/* --- 1. Brand Variables & Base Styles --- */
:root {
    --primary-blue: #60A5FA;
    --accent-green: #34D399;
    --base-text: #F9FAFB;
    --secondary-text: #9CA3AF;
    --light-grey-bg: #111827;
    --border-color: #374151;
    --card-bg: #1F2937;
    --input-bg: #374151;
    --error-red: #F87171;
    --error-bg: #452323;
    --success-green: #10B981;
    --success-bg: #064e3b;
    --warning-yellow: #F59E0B;
    --warning-bg: #451a03;
    --warning-border: #D97706;
    --warning-text: #FBBF24;
    --accent-blue-bg: #1E3A8A;
    --accent-blue-light: #3B82F6;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-sans);
    background-color: var(--light-grey-bg);
    color: var(--base-text);
    margin: 0;
    padding: 2rem;
    transition: background-color 0.3s ease, color 0.3s ease;
    /* Prevent horizontal overflow on mobile */
    overflow-x: hidden;
    /* Optimize mobile scrolling */
    -webkit-overflow-scrolling: touch;
    /* Prevent pull-to-refresh bounce on iOS */
    overscroll-behavior-y: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    /* Ensure container doesn't exceed viewport */
    width: calc(100% - 4rem);
    box-sizing: border-box;
}

.hidden { display: none !important; }

/* --- Content Page Styles --- */
.content-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0;
}

.content-header {
    text-align: center;
    padding: 3rem 2rem;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.1), rgba(52, 211, 153, 0.1));
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.content-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--base-text);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.content-header .lead {
    font-size: 1.25rem;
    color: var(--secondary-text);
    margin: 0;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .content-page {
        padding: 1rem 0;
    }

    .content-header {
        padding: 2rem 1rem;
        margin-bottom: 2rem;
    }

    .content-header h1 {
        font-size: 1.75rem;
    }

    .content-header .lead {
        font-size: 1.05rem;
    }
}

/* --- Footer Styles --- */
footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    padding-bottom: 1rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--secondary-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-blue);
}

footer p {
    margin: 0;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

/* === NATIVE MOBILE APP EXPERIENCE === */

/* Tablet - Maintain desktop-like experience */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        width: calc(100% - 3rem);
        padding: 1.25rem;
    }
}

/* Base Mobile Styles - NATIVE APP EXPERIENCE */
@media (max-width: 768px) {
    body {
        /* Full screen - no outer padding */
        padding: 0;
        /* Support safe areas for notched devices */
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }

    .container {
        /* Remove container styling on mobile - full screen */
        width: 100%;
        max-width: 100%;
        margin: 0;
        padding: 0;
        border-radius: 0;
        border: none;
        box-shadow: none;
        /* Seamless full-screen experience */
        background-color: var(--light-grey-bg);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem 1rem;
    }

    /* Native-like touch targets - minimum 44px */
    button, a.btn, .nav-btn, .auth-btn {
        min-height: 44px;
        min-width: 44px;
    }

    /* Larger, more readable text for mobile */
    body {
        font-size: 16px;
        line-height: 1.5;
    }

    h1 {
        font-size: 1.75rem;
        line-height: 1.2;
    }

    h2 {
        font-size: 1.4rem;
        line-height: 1.3;
    }

    h3 {
        font-size: 1.2rem;
        line-height: 1.3;
    }
}

/* Small Mobile - Optimized for phone portrait */
@media (max-width: 480px) {
    body {
        padding: 0;
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }

    .container {
        /* Complete edge-to-edge on small screens */
        width: 100%;
        padding: 0;
        border-radius: 0;
        border: none;
    }

    /* Even larger touch targets for small screens */
    button, a.btn, .nav-btn, .auth-btn, select, input {
        min-height: 48px;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    h3 {
        font-size: 1.1rem;
    }
}

/* --- Step-by-Step UI Styles --- */

/* Progress Bar */
#progress-bar-container {
    margin-bottom: 3rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    /* Ensure body allows scrolling and has space for fixed header */
    body {
        overflow-x: hidden !important;
        overflow-y: auto !important;
        padding-top: 0 !important; /* Remove padding - let JS handle it */
    }

    /* FORCE zero top spacing on configurator page */
    body:has(#configurator-panel) main {
        padding-top: 0 !important;
    }

    body:has(#configurator-panel) main > .step-content {
        padding-top: 0 !important;
        margin-top: 50px !important; /* Only margin for spacing below progress bar */
    }

    /* Mobile-optimized progress bar - starts below header, becomes sticky on scroll */
    #progress-bar-container {
        position: fixed;
        top: 48px; /* Starts below header (header is ~48px tall) - JS will change to 0 on scroll */
        left: 0;
        right: 0;
        z-index: 100;
        background: var(--card-bg);
        padding: 0.75rem 1rem;
        margin: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        transition: top 0.3s ease; /* Smooth transition when sticking to top */
    }

    /* Add top margin to step content to account for header + progress bar */
    .step-content {
        margin-top: 50px; /* Space for header + progress bar */
        padding-top: 0 !important; /* Remove any additional top padding */
        padding-bottom: 80px; /* Space for fixed navigation buttons at bottom */
    }

    /* Remove top padding from step-inner on mobile for tighter spacing */
    .step-content .step-inner {
        padding-top: 0;
    }

    /* Remove ALL margins/padding between h2 and form on mobile */
    .step-content h2 {
        margin-top: 0 !important;
        margin-bottom: 0 !important;
        padding-bottom: 0 !important;
    }

    /* Remove gap in setup-form-container on mobile */
    .setup-form-container {
        gap: 0.75rem;
        margin-top: 0 !important;
        padding-top: 0 !important;
    }

    /* Remove top margin from form-section on mobile */
    .form-section {
        margin-top: 0 !important;
    }

    /* Reduce padding in form-section on mobile */
    .form-section {
        padding: 0.75rem; /* Reduce from 1rem to minimize gap */
    }

    /* Compact step counter pill */
    .progress-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 0;
        position: relative;
    }

    /* Hide desktop-style step dots and labels on mobile */
    .progress-step {
        display: none !important;
    }

    /* Hide desktop connecting lines */
    .progress-bar::before,
    .progress-bar::after {
        display: none !important;
    }

    /* Add mobile step counter after progress bar */
    .progress-bar::before {
        content: attr(data-step-text);
        display: inline-flex !important;
        align-items: center;
        gap: 0.5rem;
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--base-text);
        background: var(--light-grey-bg);
        padding: 0.5rem 1rem;
        border-radius: 20px;
        border: 1px solid var(--border-color);
        position: static;
        height: auto;
        width: auto;
        max-width: none;
        left: auto;
        right: auto;
        top: auto;
    }

    /* Vertical progress indicator on left edge - inset to prevent overflow */
    #progress-bar-container::before {
        content: '';
        position: absolute;
        left: 4px;
        top: 0;
        bottom: 0;
        width: 4px;
        background: var(--border-color);
        z-index: 1;
    }

    /* Animated progress fill */
    #progress-bar-container::after {
        content: '';
        position: absolute;
        left: 4px;
        top: 0;
        width: 4px;
        height: var(--mobile-progress-height, 25%);
        background: linear-gradient(180deg, var(--primary-blue), var(--accent-green));
        transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 2;
        box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
    }

    /* Add progress percentage indicator */
    .progress-bar::after {
        content: attr(data-progress-percent);
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
        font-size: 0.8rem;
        font-weight: 700;
        color: var(--primary-blue);
        background: var(--accent-blue-bg);
        padding: 0.35rem 0.75rem;
        border-radius: 12px;
        position: static;
        height: auto;
        width: auto;
        max-width: none;
        left: auto;
        right: auto;
        top: auto;
    }
}

.progress-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    margin-bottom: 1rem;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 16px; 
    left: 16px;
    right: 16px;
    height: 2px;
    background-color: var(--border-color);
    z-index: 1;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 16px;
    left: 16px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
    z-index: 2;
    transition: width 0.3s ease;
    width: calc(var(--progress-width, 0%) - 32px);
    max-width: calc(100% - 32px);
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.5;
    transition: opacity 0.3s ease;
    position: relative;
    z-index: 3;
    min-width: 80px;
    text-align: center;
}

.progress-step.active {
    opacity: 1;
}

.progress-step.completed {
    opacity: 1;
    color: var(--accent-green);
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--base-text);
    transition: all 0.3s ease;
    position: relative;
    z-index: 4;
}

.progress-step.active .step-number {
    background-color: var(--primary-blue);
    color: white;
}

.progress-step.completed .step-number {
    background-color: var(--accent-green);
    color: white;
}

.step-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--secondary-text);
    white-space: nowrap;
    margin-top: 0.25rem;
}

.progress-step.active .step-label {
    color: var(--base-text);
    font-weight: 600;
}

/* Step Content */
.step-container {
    min-height: 400px;
    position: relative;
}

.step-content {
    animation: fadeIn 0.3s ease-in-out;
}

.step-content.hidden {
    display: none;
}

.step-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 0;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-content h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--primary-blue);
    font-size: 1.2rem;
    font-weight: 600;
}

.step-content h3 {
    margin-top: 1rem;
    margin-bottom: 0.75rem;
    color: var(--base-text);
    font-size: 1rem;
    font-weight: 600;
}

.step-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

/* Step Form Layout */
.step-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Step 1 Setup Form */
.setup-form-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.form-section {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.form-section h3 {
    color: var(--primary-blue);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

/* Nested grid for project info section that spans full width */
.form-grid-nested {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

/* Constrain ZIP code input width */
#zip-code-input {
    max-width: 150px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.form-row-split {
    grid-template-columns: 1fr 1fr;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--base-text);
    font-size: 0.875rem;
}

/* Zone Layout */
#zones-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.zone-row {
    margin-bottom: 0;
}

.zone-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    transition: all 0.3s ease;
    position: relative;
}

.zone-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.zone-card.complete {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    background-color: rgba(16, 185, 129, 0.03);
}

.zone-card.complete:hover {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3), 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Active and Inactive Zone States */
.zone-card.active-zone {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.3);
    background-color: rgba(96, 165, 250, 0.05);
}

.zone-card.inactive-zone {
    opacity: 0.5;
    pointer-events: none;
    filter: grayscale(30%);
}

.zone-card.inactive-zone .form-select,
.zone-card.inactive-zone .form-input {
    background-color: var(--card-bg);
    cursor: not-allowed;
}

.zone-header {
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.zone-label {
    font-weight: 600;
    color: var(--primary-blue);
    font-size: 1rem;
    margin: 0;
}

.zone-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    align-items: start;
}

/* When load calc is enabled, show all 4 fields in a 2x2 grid */
.zone-fields.calc-load-enabled {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 1rem;
}

/* Distribution Box Improvements */
.distro-options-container {
    max-width: 800px;
    margin: 0 auto;
}

.distro-option {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.distro-option:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.distro-option.selected {
    border-color: var(--accent-green);
    background-color: rgba(16, 185, 129, 0.05);
}

/* Dark mode support for new components */
.form-section {
    background-color: var(--light-grey-bg);
    border-color: var(--border-color);
}

.zone-card {
    background-color: var(--light-grey-bg);
    border-color: var(--border-color);
}

.zone-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.distro-option {
    background-color: var(--light-grey-bg);
    border-color: var(--border-color);
}

.distro-option:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.distro-option.selected {
    background-color: rgba(52, 211, 153, 0.1);
}

/* Tablet and larger - maintain 2 columns */
@media (min-width: 769px) {
    #zones-container {
        grid-template-columns: 1fr 1fr !important;
    }
}

/* Mobile Responsive Improvements - only single column on very small screens */
@media (max-width: 640px) {
    .setup-form-container {
        max-width: 100%;
        gap: 0.75rem; /* Match the 768px breakpoint */
    }

    .form-section {
        padding: 0.75rem; /* Reduce padding to minimize gap */
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    #zones-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .zone-card {
        padding: 0.75rem;
    }
    
    .zone-fields {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .zone-fields.calc-load-enabled {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    
    .distro-options-container {
        max-width: 100%;
    }
    
    .distro-option {
        padding: 0.75rem;
    }
    
    .calc-load-select {
        min-width: auto;
        width: 100%;
    }
}

.calc-load-fields {
    /* Remove display: contents as it breaks show/hide functionality */
}

.calc-load-fields.hidden {
    display: none;
}

/* Remove stepper from square footage input */
.zone-sqft::-webkit-outer-spin-button,
.zone-sqft::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.zone-sqft[type=number] {
    -moz-appearance: textfield;
}

/* Make zone-sqft field match select field styling exactly */
.zone-fields .zone-sqft[type="number"] {
    font-family: var(--font-sans) !important;
    width: 100% !important;
    padding: 0.75rem !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px !important;
    background-color: var(--card-bg) !important;
    color: var(--base-text) !important;
    font-size: 0.9rem !important;
    transition: border-color 0.3s ease !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    -webkit-appearance: none !important;
    -moz-appearance: textfield !important;
}

.zone-fields .zone-sqft::-webkit-outer-spin-button,
.zone-fields .zone-sqft::-webkit-inner-spin-button {
    -webkit-appearance: none !important;
    margin: 0 !important;
}

/* Navigation Buttons */
.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    min-width: 120px;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.nav-btn.primary-btn,
.nav-btn.btn-primary {
    background-color: var(--primary-blue);
    color: white;
}

.nav-btn.primary-btn:hover:not(:disabled),
.nav-btn.btn-primary:hover:not(:disabled) {
    background-color: #2563EB;
    transform: translateY(-1px);
}

.nav-btn.secondary-btn {
    background-color: transparent;
    color: var(--secondary-text);
    border: 1px solid var(--border-color);
}

.nav-btn.secondary-btn:hover:not(:disabled) {
    background-color: var(--light-grey-bg);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#find-system-btn {
    background-color: var(--accent-green);
    border-color: var(--accent-green);
}

#find-system-btn:hover:not(:disabled) {
    background-color: #059669;
    border-color: #059669;
}

#prev-step-btn.hidden + #next-step-btn {
    margin-left: auto;
}

/* System Cards */
.system-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    word-wrap: break-word;
    min-width: 0;
}

.system-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

/* Card Header */
.card-header {
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.system-title {
    margin: 0 0 0.25rem 0;
    color: var(--primary-blue);
    font-size: 1.3rem;
    font-weight: 700;
}

.system-subtitle {
    margin: 0;
    color: var(--secondary-text);
    font-size: 0.8rem;
    font-weight: 500;
}


/* --- Branded Header --- */
header { 
    border-bottom: 1px solid var(--border-color); 
    padding-top: 1rem;
    padding-bottom: 1.5rem; 
    margin-bottom: 2rem; 
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.header-main {
    text-align: center;
}

.logo-container {
    margin-bottom: 0.5rem;
}

.logo-link {
    text-decoration: none;
}

.logo-text { 
    font-size: 2.25rem; 
    font-weight: 700; 
    color: var(--primary-blue);
    transition: color 0.3s ease;
}

.logo-image {
    height: 60px;
    max-width: 300px;
    transition: opacity 0.3s ease, transform 0.2s ease;
}

.logo-image-dark {
    height: 60px;
    max-width: 300px;
    transition: opacity 0.3s ease, transform 0.2s ease;
    display: none;
}

.logo-link:hover .logo-text {
    color: var(--accent-green);
}

.logo-link:hover .logo-image,
.logo-link:hover .logo-image-dark {
    opacity: 0.8;
    transform: translateY(-1px);
}

.header-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

/* Navigation dropdown styles */
.nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    position: relative;
    cursor: pointer;
}

.dropdown-toggle::after {
    content: "▼";
    margin-left: 0.5rem;
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--base-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-item:hover {
    background-color: var(--light-grey-bg);
    color: var(--primary-blue);
}

/* Dark mode dropdown adjustments */
.dropdown-menu {
    background: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.dropdown-item {
    color: var(--base-text);
}

.dropdown-item:hover {
    background-color: var(--light-grey-bg);
    color: var(--primary-blue);
}

.nav-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.nav-link:hover {
    color: var(--primary-blue);
    background-color: var(--light-grey-bg);
}

.tagline { 
    font-size: 1rem; 
    color: var(--secondary-text); 
    margin: 0; 
}

/* MOBILE HAMBURGER MENU */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--base-text);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.mobile-menu-toggle:hover {
    background: var(--light-grey-bg);
}

.mobile-menu-toggle i {
    width: 24px;
    height: 24px;
}

/* Mobile menu overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

/* Mobile slide-out menu */
.mobile-menu-panel {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    max-width: 85vw;
    height: 100vh;
    background: var(--card-bg);
    z-index: 1000;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.3);
}

.mobile-menu-panel.active {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
    background: none;
    border: none;
    color: var(--base-text);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.mobile-menu-close:hover {
    background: var(--light-grey-bg);
}

.mobile-menu-close i {
    width: 24px;
    height: 24px;
}

.mobile-menu-content {
    padding: 1rem 0;
}

.mobile-menu-content .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    color: var(--base-text);
    text-decoration: none;
    font-size: 1rem;
    transition: background-color 0.2s ease;
    border-left: 3px solid transparent;
}

.mobile-menu-content .nav-link:hover,
.mobile-menu-content .nav-link:active {
    background: var(--light-grey-bg);
    border-left-color: var(--primary-blue);
}

.mobile-menu-content .nav-dropdown {
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-content .dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    color: var(--base-text);
    font-size: 1rem;
    cursor: pointer;
    text-align: left;
}

.mobile-menu-content .dropdown-menu {
    position: static;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    box-shadow: none;
    border: none;
    border-radius: 0;
    background: #f5f5f5;
    background: var(--light-grey-bg);
    padding: 0;
    width: 100%;
    transition: max-height 0.3s ease, opacity 0.3s ease, visibility 0s 0.3s;
}

.mobile-menu-content .nav-dropdown.active .dropdown-menu {
    max-height: 500px;
    opacity: 1;
    visibility: visible;
    transition: max-height 0.3s ease, opacity 0.3s ease, visibility 0s 0s;
}

.mobile-menu-content .dropdown-item {
    padding: 0.875rem 2rem;
    border-left: 3px solid transparent;
    display: block !important;
    color: #2d3748;
    color: var(--base-text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: background-color 0.2s ease;
    width: 100%;
    box-sizing: border-box;
}

.mobile-menu-content .dropdown-item:hover,
.mobile-menu-content .dropdown-item:active {
    background: #ffffff;
    background: var(--card-bg);
    border-left-color: #3b82f6;
    border-left-color: var(--primary-blue);
    color: #3b82f6;
    color: var(--primary-blue);
}

/* NATIVE MOBILE HEADER - Compact with Hamburger */
@media (max-width: 768px) {
    /* Define header height as CSS variable */
    :root {
        --mobile-header-height: calc(env(safe-area-inset-top) + 60px);
    }

    /* Ensure all elements use border-box sizing on mobile */
    *,
    *::before,
    *::after {
        box-sizing: border-box !important;
    }

    /* Remove body padding on mobile for edge-to-edge header */
    html {
        overflow-x: hidden !important;
        width: 100%;
    }

    body {
        padding: 0 !important;
        margin: 0 !important;
        overflow-x: hidden !important;
        width: 100% !important;
        max-width: 100vw !important;
    }

    .container {
        padding: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        border-radius: 0 !important;
        border: none !important;
        margin: 0 !important;
    }

    header {
        /* Edge-to-edge header - static position (part of content flow) */
        position: static;
        z-index: 101;
        background-color: var(--card-bg);
        border-bottom: 1px solid var(--border-color);
        padding: calc(env(safe-area-inset-top) + 0.25rem) 1rem 0.25rem 1rem;
        margin: 0;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        box-sizing: border-box;
        width: 100%;
    }

    /* Single row layout - no wrapping */
    .header-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin: 0;
        gap: 0.75rem;
        flex-wrap: nowrap;
    }

    /* Logo - leftmost */
    .header-main {
        order: 1;
        margin: 0;
        flex-shrink: 1;
        min-width: 0;
        display: flex;
        align-items: center;
    }

    /* Hide desktop nav */
    .header-nav {
        display: none !important;
    }

    /* Right side controls wrapper */
    .header-controls {
        order: 2;
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        gap: 0.625rem;
        flex-shrink: 0;
        flex-wrap: nowrap !important;
        position: relative;
        z-index: 101;
    }

    /* Show hamburger menu */
    .mobile-menu-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        width: 32px;
        height: 32px;
        padding: 0.3rem;
        background: transparent;
        border: none;
        color: var(--base-text);
    }

    .mobile-menu-toggle i {
        width: 18px;
        height: 18px;
    }

    .logo-container {
        margin-bottom: 0;
        display: flex;
        align-items: center;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .logo-image,
    .logo-image-dark {
        height: 28px;
        max-width: 120px;
        width: auto;
        display: block;
    }

    /* Hide tagline on mobile */
    .tagline {
        display: none;
    }

    /* Compact auth section - hide login on mobile */
    .auth-section {
        gap: 0.5rem;
        display: flex !important;
        flex-direction: row !important;
        flex-shrink: 0;
        align-items: center;
    }

    /* Ensure auth section is hidden when logged in */
    .auth-section.hidden,
    #auth-buttons.hidden {
        display: none !important;
    }

    .auth-section #login-btn {
        display: none !important;
    }

    .auth-btn {
        padding: 0.45rem 0.75rem;
        font-size: 0.8rem;
        min-height: 32px;
        height: 32px;
        white-space: nowrap;
        flex-shrink: 0;
        line-height: 1;
    }

    /* Hide user dropdown on mobile - consolidate into hamburger menu */
    .user-section,
    #user-menu,
    html.auth-ready #user-menu {
        display: none !important;
    }

    /* Main content padding - no need for top padding since header is static */
    main {
        padding: 0 1rem 1rem 1rem; /* Remove top padding */
        margin-top: 0;
    }

    /* Ensure first child of main doesn't add extra margin */
    main > *:first-child {
        margin-top: 0;
    }

    footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Mobile login link styling */
.mobile-login-link {
    background: var(--light-grey-bg) !important;
    border-bottom: 2px solid var(--border-color) !important;
    margin-bottom: 0.5rem !important;
}

.mobile-login-link:hover {
    background: var(--primary-blue) !important;
    color: white !important;
}

/* Mobile user info section in hamburger menu */
.mobile-user-info {
    padding: 1rem 1.5rem;
    background: var(--light-grey-bg);
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.mobile-user-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.mobile-user-info .user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mobile-user-info .user-avatar i {
    width: 22px;
    height: 22px;
}

.mobile-user-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.mobile-user-email {
    font-size: 0.95rem;
    color: var(--base-text);
    font-weight: 600;
}

/* Mobile logout button styling */
.mobile-logout-link {
    background: var(--light-grey-bg) !important;
    width: 100%;
    border: none;
    font-family: inherit;
    cursor: pointer;
}

.mobile-logout-link:hover {
    background: var(--error-red) !important;
    color: white !important;
}

.mobile-logout-link i {
    color: var(--error-red);
}

.mobile-logout-link:hover i {
    color: white !important;
}

/* Mobile upgrade link styling */
.mobile-upgrade-link i {
    color: white !important;
}

.mobile-upgrade-link:hover {
    background: var(--primary-blue-hover) !important;
}

/* Small Mobile Header - Ultra compact */
@media (max-width: 480px) {
    header {
        padding: 0.625rem 0.875rem;
    }

    .logo-image,
    .logo-image-dark {
        height: 32px;
        max-width: 110px;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .auth-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.85rem;
        min-height: 38px;
    }

    .header-top {
        gap: 0.375rem;
    }

    .mobile-menu-toggle {
        padding: 0.375rem;
    }
}

/* --- Step-by-Step Configurator Panel --- */
#configurator-panel { 
    display: block;
    padding: 0; 
    background: transparent; 
    border: none; 
    margin-bottom: 2rem; 
}

.config-section { display: flex; flex-direction: column; gap: 1.5rem; }
.config-step label { display: block; font-weight: 600; margin-bottom: 0.5rem; font-size: 0.9rem; }
/* Removed conflicting flex rule - using grid layout defined above */

.step-header { display: flex; justify-content: space-between; align-items: center; }
.step-header label { margin-bottom: 0; }

select { 
    font-family: var(--font-sans); 
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--base-text);
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

input[type="text"], input[type="number"], textarea {
    font-family: var(--font-sans);
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--card-bg);
    color: var(--base-text);
    font-size: 0.85rem;
    transition: border-color 0.3s ease;
}

textarea {
    resize: vertical;
    min-height: 80px;
    line-height: 1.4;
}

input[type="text"]:focus, input[type="number"]:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

/* --- Custom Dropdown & Form Styles --- */
.select-wrapper { position: relative; width: 100%; }
.select-wrapper::after { content: '▼'; font-size: 1rem; color: #9CA3AF; position: absolute; right: 1rem; top: 50%; transform: translateY(-50%); pointer-events: none; }

.input-wrapper { position: relative; width: 100%; }
select {
    appearance: none; -webkit-appearance: none;
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    background-color: var(--card-bg);
    color: var(--base-text);
    cursor: pointer;
}

.secondary-btn { 
    padding: 6px 12px; 
    font-size: 0.9rem; 
    background-color: transparent; 
    border: 1px solid var(--border-color); 
    color: var(--secondary-text); 
    border-radius: 4px; 
    cursor: pointer; 
}

/* --- Results Section --- */
#results-container { margin-top: 3rem; }
.result-card { position: relative; border: 1px solid var(--border-color); border-radius: 12px; padding: 1.5rem; background-color: var(--card-bg); overflow: hidden; }
.result-card h2 { margin-top: 0; color: var(--primary-blue); font-weight: 600; }
.result-card h3 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; margin-bottom: 1rem; font-size: 1rem; font-weight: 600; }
.specs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; padding: 1rem; background-color: var(--light-grey-bg); border-radius: 8px; margin-bottom: 1.5rem; border: 1px solid var(--border-color); }
.specs-grid > div { font-size: 0.9rem; }
.effective-btu-note { font-size: 0.75rem; color: var(--secondary-text); font-style: italic; }
.spec-highlight { color: var(--accent-green); font-weight: 600; }

/* === MOBILE CONFIGURATOR OPTIMIZATIONS === */

/* Mobile Form and Input Improvements */
@media (max-width: 768px) {
    /* Configurator Panel */
    #configurator-panel {
        margin-bottom: 1.5rem;
    }
    
    .config-section {
        gap: 1rem;
    }
    
    /* === iOS-STYLE FORM INPUTS === */
    /* Native iOS-style select dropdowns */
    select {
        padding: 0.875rem 1rem;
        font-size: 16px; /* Prevents iOS zoom */
        min-height: 52px;
        border-radius: 10px;
        border: 1px solid rgba(0, 0, 0, 0.1);
        background-color: var(--card-bg);
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        -webkit-tap-highlight-color: transparent;
        appearance: none;
        -webkit-appearance: none;
    }

    select:focus {
        outline: none;
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15),
                    0 2px 4px rgba(0, 0, 0, 0.1);
        transform: translateY(-1px);
    }

    select:active {
        transform: scale(0.99);
    }

    /* Enhanced select wrapper with animated chevron */
    .select-wrapper {
        position: relative;
    }

    .select-wrapper::after {
        content: '▼';
        font-size: 0.75rem;
        color: var(--secondary-text);
        position: absolute;
        right: 1rem;
        top: 50%;
        transform: translateY(-50%);
        pointer-events: none;
        transition: transform 0.3s ease, color 0.2s ease;
    }

    .select-wrapper:has(select:focus)::after {
        transform: translateY(-50%) rotate(180deg);
        color: var(--primary-blue);
    }

    /* iOS-style text and number inputs */
    input[type="text"],
    input[type="number"],
    textarea {
        padding: 0.875rem 1rem;
        font-size: 16px; /* Prevents iOS zoom */
        min-height: 52px;
        border-radius: 10px;
        border: 1px solid rgba(0, 0, 0, 0.1);
        background-color: var(--card-bg);
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        -webkit-tap-highlight-color: transparent;
    }

    input[type="text"]:focus,
    input[type="number"]:focus,
    textarea:focus {
        outline: none;
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15),
                    0 2px 4px rgba(0, 0, 0, 0.1);
        transform: translateY(-1px);
    }

    input[type="text"]:active,
    input[type="number"]:active {
        transform: scale(0.99);
    }
    
    textarea {
        min-height: 100px;
    }
    
    /* Enhanced form layouts for touch interfaces */
    .form-group {
        margin-bottom: 1.75rem;
        position: relative;
    }

    /* iOS-style form labels */
    .form-group label,
    .form-label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 600;
        font-size: 0.9rem;
        color: var(--secondary-text);
        letter-spacing: -0.01em;
        text-transform: uppercase;
        font-size: 0.75rem;
        transition: color 0.2s ease;
    }

    /* Label color change on focus */
    .form-group:has(input:focus) label,
    .form-group:has(select:focus) label,
    .form-group:has(textarea:focus) label {
        color: var(--primary-blue);
    }

    /* Radio button and checkbox improvements with iOS styling */
    input[type="radio"],
    input[type="checkbox"] {
        width: 22px;
        height: 22px;
        margin-right: 0.75rem;
        border-radius: 6px;
        border: 2px solid rgba(0, 0, 0, 0.2);
        -webkit-tap-highlight-color: transparent;
        cursor: pointer;
        transition: all 0.2s ease;
    }

    input[type="radio"] {
        border-radius: 50%;
    }

    input[type="checkbox"]:checked,
    input[type="radio"]:checked {
        background-color: var(--primary-blue);
        border-color: var(--primary-blue);
    }

    /* iOS-style buttons with haptic feedback */
    .btn {
        min-height: 52px;
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        font-weight: 600;
        border-radius: 12px;
        margin-bottom: 0.75rem;
        -webkit-tap-highlight-color: transparent;
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        letter-spacing: -0.01em;
    }

    .btn:active {
        transform: scale(0.98);
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    }

    .btn:disabled {
        opacity: 0.5;
        transform: none !important;
    }
    
    /* Form grid adjustments */
    .form-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    /* Zone configuration forms */
    .zone-item .form-group {
        margin-bottom: 1rem;
    }
    
    .zone-item select,
    .zone-item input {
        width: 100%;
    }
    
    /* Step Headers */
    .step-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .step-header label {
        margin-bottom: 0.5rem;
        font-size: 1rem;
    }
    
    /* Specs Grid - Stack on mobile */
    .specs-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 0.75rem;
    }
    
    .specs-grid > div {
        font-size: 0.9rem;
        padding: 0.25rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .specs-grid > div:last-child {
        border-bottom: none;
    }
    
    /* Results Container */
    #results-container {
        margin-top: 2rem;
    }
    
    .result-card {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .result-card h2 {
        font-size: 1.25rem;
    }
    
    .result-card h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
}

/* Small Mobile Configurator */
@media (max-width: 480px) {
    #configurator-panel {
        margin-bottom: 1rem;
    }
    
    .config-section {
        gap: 0.75rem;
    }
    
    /* Even larger touch targets for small screens */
    select,
    input[type="text"], 
    input[type="number"], 
    textarea {
        min-height: 52px;
        padding: 1rem;
        font-size: 1.1rem;
    }
    
    .step-header label {
        font-size: 1.1rem;
        font-weight: 700;
    }
    
    .result-card {
        padding: 0.75rem;
        border-radius: 8px;
    }
    
    .result-card h2 {
        font-size: 1.1rem;
    }
    
    .result-card h3 {
        font-size: 0.95rem;
    }
    
    /* Additional enhancements for very small screens */
    .component-name {
        font-size: 0.75rem;
        line-height: 1.3;
    }
    
    .component-spec {
        font-size: 0.7rem;
        padding: 0.15rem 0.35rem;
    }
    
    .component-price {
        font-size: 0.75rem;
    }
    
    .buy-button {
        padding: 0.625rem 0.75rem;
        font-size: 0.8rem;
        min-height: 40px;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        padding: 0.5rem;
    }
    
    .rank-badge {
        font-size: 0.7rem;
        padding: 0.25rem 0.5rem;
    }
}

/* Good/Better/Best Container */
#gbb-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

/* Rank Badges */
.rank-badge {
    position: absolute;
    top: -1px;
    right: -1px;
    padding: 0.5rem 1rem;
    border-radius: 0 12px 0 8px;
    font-weight: 700;
    font-size: 0.85rem;
    color: white;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.rank-best {
    background-color: #FFD700;
    color: #1F2937;
}

.rank-better {
    background-color: #C0C0C0;
    color: #1F2937;
}

.rank-good {
    background-color: #CD7F32;
    color: white;
}

/* Card States */
.is-best {
    border: 2px solid #FFD700;
    position: relative;
}

.is-better {
    border: 2px solid #C0C0C0;
    position: relative;
}

.is-good {
    border: 2px solid #CD7F32;
    position: relative;
}

/* Distribution Box Styles */
#distro-options-container { display: flex; flex-direction: column; gap: 0.5rem; }
.distro-option {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--card-bg);
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.distro-option.selected {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px var(--primary-blue, #3B82F6);
}
.distro-option label { font-size: 0.8rem; font-weight: 400; margin: 0; }

.custom-stepper {
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}
.stepper-btn {
    border: none;
    background-color: var(--light-grey-bg);
    color: var(--secondary-text);
    padding: 0.375rem 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    line-height: 1;
}
.stepper-btn:hover {
    background-color: var(--border-color);
}
.stepper-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.distro-quantity-input {
    width: 35px;
    text-align: center;
    border: none;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    padding: 0.375rem 0.15rem;
    background-color: var(--card-bg);
    color: var(--base-text);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.8rem;
    -webkit-appearance: none;
    margin: 0;
    -moz-appearance: textfield;
    pointer-events: none;
    user-select: none;
}

.port-validation-message { margin-top: 0.375rem; font-weight: 600; font-size: 0.8rem; }
.port-validation-message.valid { color: var(--accent-green); }
.port-validation-message.invalid { color: var(--error-red); }

.distro-required-message {
    padding: 0.5rem 0.75rem;
    background-color: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--primary-blue);
    border-radius: 4px;
    color: var(--base-text);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    text-align: center;
}

/* Connection type selector styling */
.connection-type-selector {
    margin-top: 0.75rem; 
    padding: 0.375rem;
    background-color: var(--card-bg);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
.connection-type-selector label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    text-align: center;
}
.radio-group {
    display: flex;
    border-radius: 4px;
    overflow: hidden;
}
.radio-label {
    flex: 1;
    text-align: center;
    padding: 0.375rem;
    background-color: var(--light-grey-bg);
    color: var(--secondary-text);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
}
.radio-label:first-of-type {
    border-right: none;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}
.radio-label:last-of-type {
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}
.radio-input {
    display: none;
}

.radio-input:checked + .radio-label {
    background-color: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* --- Dark Mode Overrides --- */
.logo-image {
    display: none;
}
.logo-image-dark {
    display: inline-block;
}
.modal-logo { filter: brightness(0.9) contrast(1.1); }
.tagline, .secondary-btn, #other-options-header { color: #9CA3AF; }
#configurator-panel { background-color: rgba(0,0,0,0.2); }
.select-wrapper::after { color: #6B7280; }
.secondary-btn { border-color: #4B5563; }
.specs-grid, .indoor-units-list li { background-color: #374151; border-color: #4B5563; }
.spec-highlight { color: #34D399; }
/* Dark Mode Overrides for Advanced Tooltips */
.tooltip-text {
    background-color: var(--light-grey-bg);
    color: var(--base-text);
    border: 1px solid var(--border-color);
}
.tooltip-text::after {
    border-color: var(--light-grey-bg) transparent transparent transparent;
}
.tooltip-text ul li {
    border-bottom: 1px solid #4b5563;
}
.tooltip-text ul li:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.1);
}
.tooltip-sub-info {
    color: #9CA3AF;
}
.tooltip {
    background-color: var(--light-grey-bg);
    color: var(--base-text);
    border: 1px solid var(--border-color);
}
.buy-button:hover { background-color: #93C5FD; }
#gbb-container .result-card.is-best { border-color: #a29bfe; box-shadow: 0 5px 30px rgba(162, 155, 254, 0.3); }

#error-message { 
    background-color: var(--error-bg); 
    color: var(--error-red); 
    padding: 1rem; 
    border-radius: 4px; 
    text-align: center; 
    margin: 2rem 0; 
}


/* Component List Styles */
.component-list {
    margin-bottom: 1.5rem;
}

.component-list h4 {
    margin: 0 0 0.75rem 0;
    color: var(--base-text);
    font-size: 1rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.component-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    border-bottom: 1px solid rgba(229, 231, 235, 0.3);
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.component-item:last-child {
    border-bottom: none;
}

.component-item:hover {
    background-color: var(--light-grey-bg);
}

.component-name {
    font-weight: 500;
    color: var(--base-text);
    font-size: 0.8rem;
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
    min-width: 0;
}

.component-spec {
    font-size: 0.75rem;
    color: var(--secondary-text);
    font-weight: 500;
    padding: 0.2rem 0.4rem;
    background-color: var(--light-grey-bg);
    border-radius: 3px;
}

.component-price {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--base-text);
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
    min-width: 0;
}

/* Buy Buttons */
.buy-buttons-container {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
    overflow: hidden;
    max-width: 100%;
}

.buy-button {
    padding: 0.4rem 0.8rem;
    background-color: var(--primary-blue);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.2s ease;
    border: 1px solid var(--primary-blue);
}

.buy-button:hover {
    background-color: #2563EB;
    border-color: #2563EB;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
}

/* Technical Details Section */
.tech-details {
    margin-bottom: 1.5rem;
}

.tech-details h4 {
    grid-column: 1 / -1;
    margin: 0 0 0.25rem 0;
    color: var(--base-text);
    font-size: 1rem;
    font-weight: 600;
    padding-bottom: 0.25rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    padding: 0.5rem;
    background-color: var(--light-grey-bg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    padding: 0.25rem 0;
}

.tech-label {
    font-size: 0.65rem;
    color: var(--secondary-text);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.tech-value {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--base-text);
    word-wrap: break-word;
}


/* Best Card Emphasis - desktop only */
@media (min-width: 769px) {
    .system-card.is-best {
        border: 2px solid var(--primary-blue);
        transform: scale(1.02);
        box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
    }
}

/* Responsive Design for System Cards */
@media (max-width: 1200px) {
    .container {
        max-width: 95%;
        padding: 1.5rem;
    }
    
    #gbb-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 900px) {
    #gbb-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .step-inner {
        max-width: 100%;
        padding: 0.5rem 0; /* Reduce top/bottom padding on mobile to minimize gap */
    }

    .system-card {
        padding: 1rem;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0.75rem;
    }
    
    .component-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        text-align: left;
    }
    
    .component-spec {
        order: 1;
    }
    
    .component-price {
        order: 2;
    }
    
    .buy-buttons-container {
        order: 3;
        justify-content: flex-start;
    }
    
    /* Enhanced mobile results display */
    .result-card,
    .system-card {
        margin-bottom: 1rem;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }
    
    .result-card h2,
    .system-card h2,
    .system-title {
        font-size: 1.1rem;
        line-height: 1.4;
        margin-bottom: 0.75rem;
    }
    
    /* Better mobile spacing for system sections */
    .component-list,
    .tech-details {
        margin-bottom: 1.25rem;
    }
    
    /* Mobile-optimized buy buttons */
    .buy-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        min-height: 44px;
        margin: 0.25rem 0.5rem 0.25rem 0;
        border-radius: 6px;
        text-align: center;
    }
    
    /* Improve rank badge visibility on mobile */
    .rank-badge {
        font-size: 0.8rem;
        padding: 0.375rem 0.75rem;
        border-radius: 0 8px 0 4px;
    }
    
    /* Mobile-friendly tech labels */
    .tech-label {
        font-size: 0.7rem;
        margin-bottom: 0.25rem;
    }
    
    .tech-value {
        font-size: 0.85rem;
        line-height: 1.3;
    }
}

/* Enhanced visual hierarchy */
.system-title {
    margin: 0 0 0.25rem 0;
    color: var(--primary-blue);
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.3;
}

.tech-details h4, .component-list h4 {
    margin: 0 0 0.25rem 0;
    color: var(--base-text);
    font-size: 1.1rem;
    font-weight: 600;
    padding-bottom: 0.25rem;
}

.tech-details h4 {
    grid-column: 1 / -1;
}

/* Advanced Tooltip Styles */
.distro-label-wrapper {
    display: flex;
    align-items: center;
}

.distro-label-wrapper.has-tooltip {
    position: relative;
    cursor: help;
}

.tooltip-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    line-height: 16px;
    text-align: center;
    font-size: 12px;
    font-weight: bold;
    color: var(--card-bg);
    background-color: var(--secondary-text);
    border-radius: 50%;
    margin-left: 8px;
}

.tooltip-text {
    visibility: hidden;
    opacity: 0;
    width: 300px;
    background-color: var(--light-grey-bg);
    color: var(--base-text);
    border: 1px solid var(--border-color);
    text-align: left;
    border-radius: 6px;
    padding: 1rem;
    position: absolute;
    z-index: 10;
    bottom: 130%;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transition: opacity 0.2s ease-in-out;
    pointer-events: none;
}

/* Arrow for the tooltip */
.tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--light-grey-bg) transparent transparent transparent;
}

/* Show on hover (desktop) */
.distro-label-wrapper.has-tooltip:hover .tooltip-text,
.tooltip-container:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

/* Show when active class is added (mobile tap) */
.distro-label-wrapper.has-tooltip.tooltip-active .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* Make tooltip icon more tappable on mobile */
@media (max-width: 768px) {
    .tooltip-icon {
        width: 28px !important;
        height: 28px !important;
        line-height: 28px !important;
        font-size: 16px !important;
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .distro-label-wrapper.has-tooltip {
        cursor: pointer;
    }

    /* Ensure tooltip is above other content on mobile */
    .tooltip-text {
        z-index: 1000 !important;
        pointer-events: auto !important;
    }

    /* Mobile tooltip positioning - ensure it stays on screen horizontally */
    .tooltip-text {
        width: calc(100vw - 3rem) !important;
        max-width: 320px !important;
        left: 1rem !important;
        right: 1rem !important;
        transform: none !important;
        margin: 0 auto;
        bottom: 130% !important;
    }

    /* Keep arrow pointing down (tooltip above element) */
    .distro-label-wrapper.has-tooltip .tooltip-text::after {
        top: 100% !important;
        bottom: auto !important;
        left: 50%;
        margin-left: -5px;
        border-color: var(--light-grey-bg) transparent transparent transparent !important;
    }
}

/* Tooltip content styling */
.tooltip-text strong {
    color: var(--primary-blue);
}

.tooltip-text ul {
    list-style-type: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
    font-size: 0.85rem;
}

.tooltip-text ul li {
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border-color);
}

.tooltip-text ul li:last-child {
    border-bottom: none;
}

.tooltip-text ul li:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.05);
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    margin-left: -0.5rem;
    margin-right: -0.5rem;
    border-radius: 3px;
}

.tooltip-sub-info {
    font-style: italic;
    color: var(--secondary-text);
    font-size: 0.9em;
}

/* Legacy tooltip support */
.tooltip-container {
    position: relative;
    display: inline-block;
}

.tooltip {
    visibility: hidden;
    opacity: 0;
    width: 300px;
    background-color: var(--light-grey-bg);
    color: var(--base-text);
    border: 1px solid var(--border-color);
    text-align: left;
    border-radius: 6px;
    padding: 1rem;
    position: absolute;
    z-index: 10;
    bottom: 130%;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transition: opacity 0.2s ease-in-out;
    pointer-events: none;
}

/* Other Options Compact Rows */
.other-options {
    margin-top: 2rem;
}

.other-options h3 {
    color: var(--secondary-text);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.compact-system-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    transition: all 0.2s ease;
}

.compact-system-row:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1);
}

.compact-system-name {
    font-weight: 600;
    color: var(--base-text);
    font-size: 0.95rem;
}

.compact-capacity {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--secondary-text);
}

.compact-price {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--base-text);
    text-align: right;
}

.compact-actions {
    display: flex;
    gap: 0.5rem;
}

.compact-btn {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--secondary-text);
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.compact-btn:hover {
    background-color: var(--light-grey-bg);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

/* Button improvements */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.btn i {
    flex-shrink: 0;
}

/* Brand Logo Styling */
.brand-logo {
    height: 40px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

/* Dark mode logos are default */
.brand-logo.light-mode-logo {
    display: none !important;
}

.brand-logo.dark-mode-logo {
    display: inline-block !important;
}

.brand-logo.light-mode-logo.fallback {
    display: inline-block !important;
}

/* Brand logos in cards and results */
.system-title .brand-logo {
    height: 24px;
    margin-right: 8px;
    vertical-align: middle;
}

/* Brand logos in about page */
.brand-item .brand-logo {
    height: 48px;
    margin-bottom: 1rem;
}

/* Responsive brand logos */
@media (max-width: 768px) {
    .brand-logo {
        height: 32px;
        max-width: 120px;
    }
    
    .system-title .brand-logo {
        height: 20px;
        margin-right: 6px;
    }
    
    .brand-item .brand-logo {
        height: 40px;
    }
}

/* Legacy compatibility */
.btn-primary {
    background-color: var(--primary-blue);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    min-width: 120px;
    box-sizing: border-box;
}

.btn-primary:hover:not(:disabled) {
    background-color: #3B82F6;
    transform: translateY(-1px);
}

/* Dark mode button text colors */
.btn-primary {
    color: white;
}

.btn-secondary {
    background-color: transparent;
    color: var(--base-text);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    color: var(--primary-blue);
    background-color: var(--light-grey-bg);
    border-color: var(--primary-blue);
}

.btn-danger {
    color: white;
}

/* Pro-only feature indicators */
.pro-indicator {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    margin-left: 0.25rem;
    display: inline-block;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.pro-only-feature {
    color: var(--secondary-text);
    font-style: italic;
    font-size: 0.875rem;
    position: relative;
}

.pro-only-feature::after {
    content: "🔒";
    margin-left: 0.25rem;
    font-size: 0.75rem;
}

/* Dark mode adjustments */
.pro-only-feature {
    color: var(--secondary-text);
}

/* Hover effects for upgrade hints */
.pro-indicator:hover,
.pro-only-feature:hover {
    cursor: help;
}

/* Pro-only tab styles */
.tab-link.pro-only {
    opacity: 0.6;
    cursor: not-allowed;
}

.tab-link.pro-only:hover {
    opacity: 0.6;
    cursor: not-allowed;
}

.tab-link.pro-only .pro-indicator {
    cursor: help;
}

/* Limit reached screen styles */
.limit-reached-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: 2rem;
}

.limit-reached-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 3rem 2rem;
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.limit-icon {
    margin-bottom: 1.5rem;
}

.limit-reached-card h2 {
    color: var(--base-text);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.limit-reached-card p {
    color: var(--secondary-text);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.upgrade-benefits {
    text-align: left;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--light-grey-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.upgrade-benefits h3 {
    color: var(--base-text);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefits-list li {
    display: flex;
    align-items: center;
    color: var(--base-text);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    padding: 0;
}

.benefit-icon {
    color: var(--accent-green);
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.limit-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-large {
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
}

/* Dark mode adjustments */
.limit-reached-card {
    background: var(--card-bg);
    border-color: var(--border-color);
}

.upgrade-benefits {
    background: var(--light-grey-bg);
    border-color: var(--border-color);
}

.btn-secondary {
    background-color: transparent;
    color: var(--base-text);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
    box-sizing: border-box;
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--light-grey-bg);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--primary-blue);
    color: white;
    transform: translateY(-1px);
}

.btn-outline:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Dark mode support for outline button */
body.dark-mode .btn-outline {
    color: #60a5fa;
    border-color: #60a5fa;
}

body.dark-mode .btn-outline:hover:not(:disabled) {
    background-color: #3b82f6;
    border-color: #3b82f6;
    color: white;
}

.btn-danger {
    background-color: #dc2626;
    color: white;
    border: 1px solid #dc2626;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    min-width: 120px;
    box-sizing: border-box;
}

.btn-danger:hover:not(:disabled) {
    background-color: #b91c1c;
    transform: translateY(-1px);
}

/* --- Authentication Styles --- */
.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Prevent auth button flicker on page load by hiding correct sections based on cached auth state */
/* Default: show auth buttons, hide user menu (for non-authenticated users) */
html:not(.auth-ready) #user-menu {
    display: none !important;
}

/* When authenticated (auth-ready class set by inline script): hide auth buttons, show user menu */
html.auth-ready #auth-buttons {
    display: none !important;
}

html.auth-ready #user-menu {
    display: flex !important;
}

/* Hide user menu on mobile viewports */
@media (max-width: 768px) {
    html.auth-ready #user-menu {
        display: none !important;
    }
}

/* Mobile menu visibility control */
html:not(.auth-ready) #mobile-user-info,
html:not(.auth-ready) .mobile-user-link {
    display: none !important;
}

html.auth-ready #mobile-login-link {
    display: none !important;
}

html.auth-ready #mobile-user-info,
html.auth-ready .mobile-user-link {
    display: block !important;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-email {
    font-size: 0.875rem;
    color: var(--secondary-text);
    font-weight: 500;
}

.pro-badge {
    background: linear-gradient(135deg, var(--accent-green), var(--primary-blue));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.auth-btn {
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    min-width: auto;
}

/* User Dropdown Menu */
.user-dropdown {
    position: relative;
}

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--base-text);
    border-radius: 8px;
}

.user-menu-toggle:hover {
    background: var(--light-grey-bg);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.user-avatar i {
    width: 20px;
    height: 20px;
}

.user-info-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.125rem;
}

.user-email {
    font-size: 0.875rem;
    color: var(--base-text);
    font-weight: 500;
}

.dropdown-icon {
    width: 16px;
    height: 16px;
    color: var(--secondary-text);
    transition: transform 0.2s ease;
    margin-left: 0.25rem;
}

.user-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.user-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 240px;
    padding: 0.5rem 0;
    padding-top: 0.75rem;
    margin-top: 0.25rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    transition-delay: 0s, 0s, 0s;
    pointer-events: none;
}

/* Create larger invisible hover bridge to cover the gap */
.user-dropdown-menu::before {
    content: '';
    position: absolute;
    top: -0.75rem;
    left: -0.5rem;
    right: -0.5rem;
    height: 1rem;
    background: transparent;
    pointer-events: auto;
}

.user-dropdown:hover .user-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    transition-delay: 0s, 0s, 0s;
}

/* Add delay before closing to allow mouse transfer */
.user-dropdown-menu:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.user-dropdown:not(:hover) .user-dropdown-menu:not(:hover) {
    transition-delay: 0s, 0.3s, 0.3s;
}

.user-dropdown-menu .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--base-text);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color 0.2s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    box-sizing: border-box;
}

.user-dropdown-menu .dropdown-item:hover {
    background: var(--light-grey-bg);
}

.user-dropdown-menu .dropdown-item i {
    width: 16px;
    height: 16px;
    color: var(--secondary-text);
}

.user-dropdown-menu .dropdown-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    color: var(--secondary-text);
}

.user-dropdown-menu .dropdown-info i {
    width: 16px;
    height: 16px;
}

.user-dropdown-menu .upgrade-item {
    background: var(--primary-blue);
    color: white;
    font-weight: 600;
    margin: 0.25rem 0.5rem;
    border-radius: 6px;
}

.user-dropdown-menu .upgrade-item:hover {
    background: var(--primary-blue-hover);
}

.user-dropdown-menu .upgrade-item i {
    color: white;
}

.user-dropdown-menu .logout-item {
    color: var(--error-red);
}

.user-dropdown-menu .logout-item:hover {
    background: #FEE2E2;
}

.user-dropdown-menu .logout-item i {
    color: var(--error-red);
}

.user-dropdown-menu .dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none; /* Hidden by default - prevents blocking clicks */
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal:not(.hidden),
.modal.show,
.modal.active {
    display: flex; /* Show when not hidden or when active */
}

.modal.hidden {
    display: none !important;
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    overflow-x: hidden;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Wider modal for projects */
#projects-modal .modal-content {
    max-width: 720px;
    height: 75%;
}

/* Project Action Modals */
#rename-project-modal .modal-content,
#copy-project-modal .modal-content,
#delete-project-modal .modal-content {
    width: 90%;
    max-width: 500px;
}

#rename-project-modal .auth-form,
#copy-project-modal .auth-form {
    text-align: center;
}

/* Center text in modal buttons */
#rename-project-modal .btn,
#copy-project-modal .btn,
#delete-project-modal .btn {
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Center text in logout and next buttons */
#logout-btn,
#next-step-btn {
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Center text in save system buttons */
.save-system-btn {
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.confirmation-content {
    padding: 1rem 0;
    text-align: center;
}

.confirmation-content p {
    margin-bottom: 1rem;
}

.warning-text {
    color: #ff6b6b;
    font-size: 0.9rem;
    font-style: italic;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--base-text);
}

.modal-title-with-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal-logo {
    height: 24px;
    width: auto;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-text);
    transition: color 0.2s ease;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--base-text);
}

.auth-form {
    padding: 0 1.5rem 1.5rem;
}

.save-project-form {
    padding: 0 1.5rem 1.5rem;
}

.save-project-form .form-group {
    margin-bottom: 1.25rem;
}

.save-project-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--base-text);
    font-size: 0.875rem;
}

.save-project-form input,
.save-project-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    background-color: var(--card-bg);
    color: var(--base-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

.save-project-form input:focus,
.save-project-form textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Duplicate System Modal Styles */
#duplicate-system-modal .form-group {
    margin-bottom: 1.25rem;
}

#duplicate-system-modal label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--base-text);
    font-size: 0.875rem;
}

#duplicate-system-modal input,
#duplicate-system-modal textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    background-color: var(--card-bg);
    color: var(--base-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

#duplicate-system-modal input:focus,
#duplicate-system-modal textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.auth-form .form-group {
    margin-bottom: 1.25rem;
}

.auth-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--base-text);
    font-size: 0.875rem;
}

.auth-form input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    background-color: var(--card-bg);
    color: var(--base-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-actions {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.form-actions .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.modal-footer {
    padding: 0 1.5rem 1.5rem;
    text-align: center;
}

.modal-footer p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--secondary-text);
}

.modal-footer a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.modal-footer a:hover {
    color: var(--accent-green);
    text-decoration: underline;
}

.error-message {
    background-color: var(--error-bg);
    color: var(--error-red);
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    margin-top: 1rem;
    border: 1px solid var(--error-red);
}

.success-message {
    background-color: #F0FDF4;
    color: var(--accent-green);
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    margin-top: 1rem;
    border: 1px solid var(--accent-green);
    background-color: #032B1A;
}

/* Projects List Styles */
.projects-list {
    padding: 0 1.5rem 1.5rem;

    overflow-y: auto;
}

.project-item {
    background-color: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: border-color 0.2s ease;
}

.project-item:hover {
    border-color: var(--primary-blue);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.project-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--base-text);
    margin: 0;
}

.project-date {
    font-size: 0.75rem;
    color: var(--secondary-text);
}

.project-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.project-actions .btn {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    min-width: auto;
    flex: 0 0 auto;
}

.loading-message {
    text-align: center;
    color: var(--secondary-text);
    font-style: italic;
    padding: 2rem 0;
}

.empty-projects {
    text-align: center;
    color: var(--secondary-text);
    padding: 2rem 0;
}

/* Save Project Button (appears in results) */
.save-project-section {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
}

.save-project-section h3 {
    margin: 0 0 1rem 0;
    color: var(--base-text);
    font-size: 1.125rem;
}

.save-project-section p {
    margin: 0 0 1.5rem 0;
    color: var(--secondary-text);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* REMOVED - Conflicting with new mobile header layout */
    /* .header-controls {
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }

    .auth-section,
    .user-section {
        justify-content: center;
    } */

    .user-info {
        flex-direction: column;
        text-align: center;
        gap: 0.25rem;
    }
    
    .modal-content {
        margin: 0.5rem;
        width: calc(100% - 1rem);
        max-height: 95vh;
        border-radius: 12px 12px 0 0;
        max-width: none;
    }
    
    /* Full-height modals for mobile */
    #projects-modal .modal-content {
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
        margin: 0;
        width: 100%;
    }
    
    /* Enhance modal close button for mobile */
    .modal-close {
        padding: 12px;
        font-size: 1.25rem;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Modal header improvements */
    .modal-header {
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        position: sticky;
        top: 0;
        background-color: var(--card-bg);
        z-index: 10;
    }
    
    /* Form elements in modals */
    .modal .auth-form input,
    .modal .auth-form select,
    .modal .auth-form textarea {
        padding: 0.875rem;
        font-size: 1rem;
        min-height: 48px;
    }
    
    /* Modal buttons */
    .modal .btn {
        padding: 0.875rem 1rem;
        font-size: 1rem;
        min-height: 48px;
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    /* Modal footer */
    .modal-footer {
        padding: 1rem;
        border-top: 1px solid var(--border-color);
        position: sticky;
        bottom: 0;
        background-color: var(--card-bg);
    }
    
    /* Floating authentication menu mobile */
    .floating-auth-menu .btn {
        padding: 0.75rem 1rem;
        min-height: 44px;
    }
    
    /* Fix dropdown menus going off-screen on mobile */
    .nav-dropdown .dropdown-menu {
        left: auto;
        right: 0;
        min-width: 180px;
        max-width: calc(100vw - 2rem);
    }
    
    /* Disable hover dropdowns on touch devices */
    @media (hover: none) {
        .nav-dropdown:hover .dropdown-menu {
            opacity: 0;
            visibility: hidden;
        }
        
        .dropdown-toggle::after {
            display: none;
        }
    }
    
    .project-header {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .project-actions {
        justify-content: space-between;
    }
}

/* === COMPREHENSIVE DARK MODE STYLING === */

/* Box shadows in dark mode */
.container {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.zone-card {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.zone-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.distro-option {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.distro-option:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Form inputs and selects */
input[type="text"], input[type="number"], input[type="email"], input[type="password"], textarea, select {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--base-text);
}

input[type="text"]:focus, input[type="number"]:focus, input[type="email"]:focus, input[type="password"]:focus, textarea:focus, select:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.2);
}

/* Tooltips */
.tooltip .tooltip-text {
    background-color: #0f172a;
    color: var(--base-text);
    border-color: var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.tooltip .tooltip-text::after {
    border-top-color: #0f172a;
}

/* Modal content */
.modal-content {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.modal-header {
    border-bottom-color: var(--border-color);
}

.modal {
    background-color: rgba(17, 24, 39, 0.8);
}

/* Navigation buttons */
.nav-btn {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--base-text);
}

.nav-btn:hover {
    background-color: var(--light-grey-bg);
}

/* Progress bar */
.progress-step {
    color: var(--secondary-text);
}

.progress-step.active {
    color: white;
}

.progress-step.completed {
    color: var(--accent-green);
}

.progress-step .step-number {
    background-color: var(--border-color);
    color: var(--base-text);
}

.progress-step.active .step-number {
    background-color: var(--primary-blue);
    color: white;
}

.progress-step.completed .step-number {
    background-color: var(--accent-green);
    color: white;
}

/* System cards and results */
.system-card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.system-title {
    color: var(--base-text);
}

.system-subtitle {
    color: var(--secondary-text);
}

.tech-details {
    background-color: rgba(55, 65, 81, 0.3);
    border-color: var(--border-color);
}

.tech-item {
    border-bottom-color: var(--border-color);
}

.tech-label {
    color: var(--secondary-text);
}

.tech-value {
    color: var(--base-text);
}

.component-list {
    background-color: rgba(55, 65, 81, 0.2);
    border-color: var(--border-color);
}

.component-item {
    border-bottom-color: var(--border-color);
}

.component-name {
    color: var(--base-text);
}

.component-spec {
    color: var(--secondary-text);
}

.component-price {
    color: var(--base-text);
}

/* Buy buttons */
.buy-button {
    background-color: var(--primary-blue);
    color: white;
}

.buy-button:hover {
    background-color: #3B82F6;
}

/* Error and success states */
.error-message {
    background-color: var(--error-bg);
    color: var(--error-red);
    border-color: #7F1D1D;
}

.warning-message {
    background-color: var(--warning-bg, #451a03);
    color: var(--warning-yellow, #F59E0B);
    border-color: #92400E;
}

/* Tables */
table {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

th {
    background-color: var(--light-grey-bg);
    color: var(--base-text);
    border-color: var(--border-color);
}

td {
    border-color: var(--border-color);
    color: var(--base-text);
}

/* Loading states */
.loading-spinner {
    border-color: var(--border-color);
    border-top-color: var(--primary-blue);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    -webkit-animation: spin 1s linear infinite;
    animation: spin 1s linear infinite;
    display: inline-block;
}

.loading-message {
    color: var(--secondary-text);
}

/* Badges and tags */
.badge {
    background-color: var(--primary-blue);
    color: white;
}

.tag {
    background-color: var(--card-bg);
    color: var(--base-text);
    border-color: var(--border-color);
}

.pro-badge {
    background-color: var(--accent-green);
    color: white;
}

/* Links */
a {
    color: var(--primary-blue);
}

a:hover {
    color: #3B82F6;
}


/* Code blocks and pre */
code {
    background-color: var(--light-grey-bg);
    color: var(--accent-green);
    border-color: var(--border-color);
}

pre {
    background-color: var(--light-grey-bg);
    border-color: var(--border-color);
    color: var(--base-text);
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 12px;
    background-color: var(--light-grey-bg);
}

::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--secondary-text);
}

::-webkit-scrollbar-track {
    background-color: var(--card-bg);
}

::-webkit-scrollbar-corner {
    background-color: var(--light-grey-bg);
}

/* Disabled states */
.btn:disabled, button:disabled, input:disabled, select:disabled, textarea:disabled {
    background-color: var(--light-grey-bg);
    color: var(--secondary-text);
    border-color: var(--border-color);
    opacity: 0.6;
    cursor: not-allowed;
}

/* Placeholders */
input::placeholder, textarea::placeholder {
    color: var(--secondary-text);
    opacity: 0.7;
}

/* Selection */
::selection {
    background-color: rgba(96, 165, 250, 0.3);
    color: var(--base-text);
}

/* Focus states */
button:focus, input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Dropdown lists */
.dropdown-menu {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.dropdown-item {
    color: var(--base-text);
}

.dropdown-item:hover {
    background-color: var(--light-grey-bg);
}

/* Separator lines */
hr {
    border-color: var(--border-color);
}

.divider {
    background-color: var(--border-color);
}

/* Card shadows and borders */
.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.card-header {
    border-bottom-color: var(--border-color);
    color: var(--base-text);
}

.card-body {
    color: var(--base-text);
}

.card-footer {
    border-top-color: var(--border-color);
    background-color: rgba(55, 65, 81, 0.2);
}

/* List items */
.list-item {
    border-bottom-color: var(--border-color);
    color: var(--base-text);
}

.list-item:hover {
    background-color: var(--light-grey-bg);
}

/* Quote and blockquote */
blockquote {
    border-left-color: var(--primary-blue);
    background-color: rgba(96, 165, 250, 0.1);
    color: var(--base-text);
}

/* Alert boxes */
.alert {
    border-color: var(--border-color);
    color: var(--base-text);
}

.alert-info {
    background-color: rgba(96, 165, 250, 0.1);
    border-color: var(--primary-blue);
}

.alert-success {
    background-color: rgba(52, 211, 153, 0.1);
    border-color: var(--accent-green);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: var(--warning-yellow, #F59E0B);
}

.alert-error, .alert-danger {
    background-color: rgba(248, 113, 113, 0.1);
    border-color: var(--error-red);
}

/* Step indicators */
.step-indicator {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--secondary-text);
}

.step-indicator.active {
    background-color: var(--primary-blue);
    color: white;
}

.step-indicator.completed {
    background-color: var(--accent-green);
    color: white;
}

/* Tabs */
.tab {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--base-text);
}

.tab.active {
    background-color: var(--primary-blue);
    color: white;
}

.tab-content {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--base-text);
}

/* Floating Authentication Menu */
.floating-auth-menu {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    min-width: auto;
    width: auto;
    backdrop-filter: blur(8px);
    transition: all 0.2s ease 0s;
    /* Add padding to increase hover area without visual change */
    padding: 10px;
    margin: -10px;
}

/* CSS-only hover expansion with delay for easier mouse transfer */
.floating-auth-menu:hover {
    transition-delay: 0.15s;
}

.floating-auth-menu:not(:hover) {
    transition-delay: 0.5s;
}

/* Create invisible hover bridge around entire menu for easier mouse targeting */
.floating-auth-menu::before {
    content: '';
    position: absolute;
    top: -12px;
    left: -12px;
    right: -12px;
    bottom: -12px;
    background: transparent;
    pointer-events: auto;
    z-index: 0;
}

.floating-menu-content {
    padding: 1rem;
    position: relative;
    z-index: 1;
}

.user-info-floating {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-text);
}

.user-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.floating-user-email {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--base-text);
}

.floating-pro-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-blue);
    background: var(--accent-blue-bg);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    width: fit-content;
}

.floating-menu-actions {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.floating-menu-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--base-text);
    font-size: 0.875rem;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.2s ease;
    width: 100%;
}

.floating-menu-btn:hover {
    background: var(--light-grey-bg);
}

.floating-menu-btn.logout {
    color: var(--error-red);
}

.floating-menu-btn.logout:hover {
    background: var(--error-bg);
}

.floating-menu-btn span {
    flex: 1;
}

/* Collapse button styles */
.floating-collapse-btn {
    background: none;
    border: none;
    color: var(--secondary-text);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
    margin-left: auto;
}

.floating-collapse-btn:hover {
    background: var(--light-grey-bg);
    color: var(--base-text);
}

.floating-collapse-btn i {
    transition: transform 0.2s ease;
}

/* Default collapsed state */
.floating-auth-menu .floating-menu-actions {
    display: none;
}

.floating-auth-menu .user-info-floating {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

/* Collapsed state - hide user details text to show only avatar and collapse button */
.floating-auth-menu .user-details {
    display: none;
}

.floating-auth-menu .floating-menu-content {
    padding: 0.5rem;
    position: relative;
    z-index: 1;
}

.floating-auth-menu .user-info-floating {
    gap: 0.5rem;
}

/* Expanded state */
.floating-auth-menu.expanded {
    min-width: 280px;
}

.floating-auth-menu.expanded .floating-menu-actions {
    display: block;
}

.floating-auth-menu.expanded .user-info-floating {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    gap: 0.75rem;
}

.floating-auth-menu.expanded .user-details {
    display: flex;
}

.floating-auth-menu.expanded .floating-menu-content {
    padding: 1rem;
}

.floating-auth-menu.expanded .floating-collapse-btn i {
    transform: rotate(180deg);
}

/* Increase hover area when expanded to prevent accidental closure */
.floating-auth-menu.expanded::before {
    top: -18px;
    left: -18px;
    right: -18px;
    bottom: -18px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .floating-auth-menu {
        top: 10px;
        right: 10px;
        left: 10px;
        min-width: unset;
    }
}

/* System Limit Overlay Styles */
.system-limit-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: none; /* Hidden by default - prevents blocking clicks */
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
}

.system-limit-overlay.show,
.system-limit-overlay.active {
    display: flex; /* Show when active */
}

.system-limit-modal {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.limit-header {
    text-align: center;
    margin-bottom: 2rem;
}

.limit-header .limit-icon {
    margin-bottom: 1rem;
}

.limit-header h2 {
    color: var(--base-text);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.limit-message {
    color: var(--secondary-text);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

.limit-content {
    margin-bottom: 2rem;
}

.current-vs-pro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.current-plan, .pro-plan {
    background: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.pro-plan {
    border-color: var(--primary-blue);
    background: rgba(59, 130, 246, 0.05);
}

.current-plan h4, .pro-plan h4 {
    color: var(--base-text);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.plan-limits, .plan-benefits {
    list-style: none;
    padding: 0;
    margin: 0;
}

.plan-limits li, .plan-benefits li {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    color: var(--base-text);
    font-size: 0.9rem;
}

.plan-limits .limit-icon {
    color: var(--secondary-text);
    margin-right: 0.5rem;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.plan-benefits .pro-icon {
    color: var(--primary-blue);
    margin-right: 0.5rem;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.limit-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.limit-actions .btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
}

.limit-note {
    text-align: center;
    padding: 1rem;
    background: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.limit-note p {
    color: var(--secondary-text);
    font-size: 0.875rem;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Disable configurator when overlay is shown */
.system-limit-overlay ~ #progress-bar-container,
.system-limit-overlay ~ #configurator-panel {
    pointer-events: none;
    filter: blur(2px);
    opacity: 0.5;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .system-limit-modal {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .current-vs-pro {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .limit-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .limit-note p {
        flex-direction: column;
        text-align: center;
    }
}


/* State Restoration Loading Overlay */
#state-restoration-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    display: none; /* Hidden by default - prevents blocking clicks */
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

#state-restoration-overlay.show,
#state-restoration-overlay.active {
    display: flex; /* Show when active */
}

.restoration-spinner {
    text-align: center;
    color: white;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.restoration-spinner .spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    -webkit-animation: spin 1s linear infinite;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem auto;
}

.restoration-spinner p {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
    color: white;
    opacity: 0.9;
}

/* === DOCUMENT DRAWER STYLES === */

.document-drawer {
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.drawer-toggle {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--light-grey-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--base-text);
    transition: all 0.2s ease;
}

.drawer-toggle:hover {
    background: var(--accent-blue-bg);
    border-color: var(--primary-blue);
}

.drawer-icon {
    font-size: 0.8rem;
    color: var(--secondary-text);
    transition: transform 0.2s ease;
}

.drawer-content {
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--card-bg);
    overflow: hidden;
}

/* Ensure drawer-content works with class */
.drawer-content {
    background: #1f2937;
    border-color: #374151;
}

.drawer-content .upgrade-prompt {
    background: #1f2937;
}

.doc-count, .doc-types {
    background: #374151;
    border-color: #60A5FA;
    color: #60A5FA;
}

.system-preview {
    background: #374151;
    border-color: #4b5563;
}

.drawer-toggle {
    background: #374151;
    border-color: #4b5563;
    color: #f3f4f6;
}

.drawer-toggle:hover {
    background: #1E3A8A;
    border-color: #3b82f6;
}

.drawer-content.hidden {
    display: none;
}

.drawer-loading {
    padding: 1.5rem;
    text-align: center;
    color: var(--secondary-text);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-blue);
    border-radius: 50%;
    -webkit-animation: spin 1s linear infinite;
    animation: spin 1s linear infinite;
}
}

@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); transform: rotate(360deg); }
}

@keyframes spin {
    0% { -webkit-transform: rotate(0deg); transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); transform: rotate(360deg); }
}

/* Loading ellipsis animation */
@keyframes ellipsis {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
    100% { content: ''; }
}

.loading-ellipsis::after {
    content: '';
    animation: ellipsis 1.5s infinite;
}

/* Step Loading Overlay */
.step-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 100;
    border-radius: 12px;
}

.step-loading-overlay .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    -webkit-animation: spin 1s linear infinite;
    animation: spin 1s linear infinite;
}

.step-loading-overlay p {
    margin: 0;
    color: var(--base-text);
    font-size: 1rem;
    font-weight: 500;
}

.step-inner {
    position: relative;
}

<<<<<<< HEAD
/* AHRI Certification Badges */
.certification-badge {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Yes/Positive badges - All Green */
.certification-badge.energy-star,
.certification-badge.cold-climate,
.certification-badge.tax-credit {
    background-color: #22c55e;
    color: white;
}

/* No/Negative badges - All Gray */
.certification-badge.not-certified,
.certification-badge.not-energy-star,
.certification-badge.not-cold-climate,
.certification-badge.not-tax-credit {
    background-color: #9ca3af;
    color: white;
}

/* Dark mode certification badges */
.certification-badge.energy-star, .certification-badge.cold-climate, .certification-badge.tax-credit {
    background-color: #16a34a;
}

/* Dark mode not certified badges */
.certification-badge.not-certified, .certification-badge.not-energy-star, .certification-badge.not-cold-climate, .certification-badge.not-tax-credit {
    background-color: #6b7280;
    color: #e5e7eb;
}

/* Enhanced Section Headers */
.specifications-section h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e5e7eb;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.specifications-section h3::before {
    content: '';
    width: 4px;
    height: 20px;
    background: #3b82f6;
    border-radius: 2px;
}

/* System detail certifications */
.spec-item.certifications {
    padding: 0.75rem 0;
}

.spec-item.certifications .certification-badge {
    margin-right: 0.5rem;
    margin-bottom: 0.25rem;
    display: inline-block;
}

.spec-item .label {
    font-weight: 600;
    color: #6b7280;
    min-width: 120px;
    display: inline-block;
}

.spec-item .pro-only-feature {
    color: #f59e0b;
    font-style: italic;
    font-weight: 500;
}

.spec-item .label {
    color: #9ca3af;
}

.spec-item .pro-only-feature {
    color: #fbbf24;
}

/* System Specifications Section */
.system-specifications {
    margin-top: 2rem;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.specifications-header {
    padding: 1.5rem 2rem 0.5rem 2rem;
    border-bottom: 1px solid #e5e7eb;
}

.specifications-header h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
}

.specifications-header p {
    margin: 0;
    color: #6b7280;
    font-size: 0.95rem;
}

.specifications-content {
    padding: 1.5rem 2rem 2rem 2rem;
}

.spec-section {
    margin-bottom: 2rem;
}

.spec-section:last-child {
    margin-bottom: 0;
}

.spec-section-title {
    margin: 0 0 1rem 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: #374151;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1.25rem;
    background: #f8f9fa;
    border-radius: 12px;
    margin-bottom: 0.75rem;
}


.spec-label {
    font-weight: 600;
    color: #6b7280;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.spec-value {
    font-weight: 700;
    color: #1f2937;
    text-align: right;
    font-size: 1rem;
}

/* Pro Feature Notice */
.pro-feature-notice {
    grid-column: 1 / -1;
    justify-content: center;
    border-left-color: #f59e0b;
    background: #fef3c7;
}

.pro-feature-notice .pro-only-feature {
    font-weight: 600;
    color: #92400e;
}

/* No data notice for Pro users */
.no-data-notice {
    grid-column: 1 / -1;
    justify-content: center;
    border-left-color: #6b7280;
    background: #f3f4f6;
}

.no-data-notice .no-data-message {
    font-weight: 500;
    color: #4b5563;
    font-style: italic;
}

/* Special styling for BTU and percentage values */
.spec-value .usage-indicator,
.spec-value .headroom-indicator,
.spec-value .zones-indicator {
    padding: 0.375rem 0.75rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Usage percentage colors */
.usage-indicator.usage-low {
    background: #dcfce7;
    color: #16a34a;
}

.usage-indicator.usage-medium {
    background: #fed7aa;
    color: #ea580c;
}

.usage-indicator.usage-high {
    background: #fecaca;
    color: #dc2626;
}

/* Capacity Indicators */
.usage-indicator, .headroom-indicator, .zones-indicator {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.85rem;
}

.usage-indicator.usage-low {
    background-color: #dcfce7;
    color: #166534;
}

.usage-indicator.usage-medium {
    background-color: #fef3c7;
    color: #92400e;
}

.usage-indicator.usage-high {
    background-color: #fee2e2;
    color: #dc2626;
}

.headroom-indicator.headroom-high {
    background-color: #dcfce7;
    color: #166534;
}

.headroom-indicator.headroom-medium {
    background-color: #fef3c7;
    color: #92400e;
}

.headroom-indicator.headroom-low {
    background-color: #fee2e2;
    color: #dc2626;
}

.zones-indicator.zones-high {
    background-color: #dcfce7;
    color: #166534;
}

.zones-indicator.zones-medium {
    background-color: #fef3c7;
    color: #92400e;
}

.zones-indicator.zones-low {
    background-color: #fee2e2;
    color: #dc2626;
}

/* Dark Mode Specifications */
.system-specifications {
    background: #1f2937;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.specifications-header {
    border-bottom-color: #374151;
}

.specifications-header h3 {
    color: #f9fafb;
}

.specifications-header p {
    color: #9ca3af;
}

.spec-section-title {
    color: #e5e7eb;
    border-bottom-color: #374151;
}

/* Dark mode spec items */
.spec-item {
    background: #1f2937;
}


.spec-label {
    color: #9ca3af;
}

.spec-value {
    color: #f3f4f6;
}

/* Dark mode section headers */
.specifications-section h3 {
    color: #f3f4f6;
    border-bottom-color: #374151;
}

/* Dark mode usage indicators */
.usage-indicator.usage-low {
    background: #064e3b;
    color: #34d399;
}

.usage-indicator.usage-medium {
    background: #7c2d12;
    color: #fb923c;
}

.usage-indicator.usage-high {
    background: #7f1d1d;
    color: #f87171;
}
}

.pro-feature-notice {
    background: #451a03;
    border-left-color: #f59e0b;
}

.pro-feature-notice .pro-only-feature {
    color: #fbbf24;
}

.no-data-notice {
    background: #374151;
    border-left-color: #9ca3af;
}

.no-data-notice .no-data-message {
    color: #d1d5db;
}

/* Dark Mode Capacity Indicators */
.usage-indicator.usage-low {
    background-color: #064e3b;
    color: #6ee7b7;
}

.usage-indicator.usage-medium {
    background-color: #451a03;
    color: #fcd34d;
}

.usage-indicator.usage-high {
    background-color: #7f1d1d;
    color: #fca5a5;
}

.headroom-indicator.headroom-high {
    background-color: #064e3b;
    color: #6ee7b7;
}

.headroom-indicator.headroom-medium {
    background-color: #451a03;
    color: #fcd34d;
}

.headroom-indicator.headroom-low {
    background-color: #7f1d1d;
    color: #fca5a5;
}

.zones-indicator.zones-high {
    background-color: #064e3b;
    color: #6ee7b7;
}

.zones-indicator.zones-medium {
    background-color: #451a03;
    color: #fcd34d;
}

.zones-indicator.zones-low {
    background-color: #7f1d1d;
    color: #fca5a5;
}

/* Responsive Design */
@media (max-width: 768px) {
    .specifications-header,
    .specifications-content {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .spec-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .spec-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

/* Document List Styles */
.documents-list {
    padding: 1rem;
}

.documents-header h5 {
    color: var(--base-text);
    font-size: 1rem;
    margin: 0 0 1rem 0;
    font-weight: 600;
}

.doc-group {
    margin-bottom: 1.5rem;
}

.doc-group:last-child {
    margin-bottom: 0;
}

.doc-group h6 {
    color: var(--base-text);
    font-size: 0.9rem;
    margin: 0 0 0.5rem 0;
    font-weight: 600;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--border-color);
}

.doc-items {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.doc-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem;
    background: var(--light-grey-bg);
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.doc-item:hover {
    background: var(--accent-blue-bg);
}

.doc-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    flex: 1;
}

.doc-link:hover {
    text-decoration: underline;
}

.doc-type {
    font-size: 0.75rem;
    color: var(--secondary-text);
    background: white;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.no-docs {
    text-align: center;
    color: var(--secondary-text);
    font-style: italic;
    padding: 1rem;
    margin: 0;
}

/* Upgrade Prompt Styles */
.upgrade-prompt {
    padding: 1rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.upgrade-header {
    margin-bottom: 1rem;
}

.upgrade-header h5 {
    color: var(--base-text);
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.upgrade-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.doc-count, .doc-types {
    background: var(--card-bg);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--primary-blue);
    font-weight: 600;
    border: 1px solid var(--primary-blue);
}

.upgrade-benefits {
    margin-bottom: 1rem;
}

.upgrade-benefits p {
    color: var(--base-text);
    font-weight: 600;
    margin: 0 0 0.5rem 0;
}

.upgrade-benefits ul {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.25rem;
}

.upgrade-benefits li {
    color: var(--secondary-text);
    font-size: 0.85rem;
    padding: 0.25rem 0;
}

.system-preview {
    background: var(--card-bg);
    padding: 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.system-preview p {
    color: var(--base-text);
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    font-size: 0.85rem;
}

.preview-item {
    color: var(--secondary-text);
    font-size: 0.8rem;
    padding: 0.2rem 0;
}

.upgrade-action {
    text-align: center;
}

.upgrade-btn {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 0.5rem;
}

.upgrade-btn:hover {
    background: var(--primary-blue-hover, #0056b3);
    transform: translateY(-1px);
}

.upgrade-note {
    color: var(--secondary-text);
    font-size: 0.75rem;
    margin: 0;
}

/* Saved Projects Document Items */
.project-doc-item {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    background: var(--light-grey-bg);
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.project-doc-item:hover {
    background: var(--accent-blue-bg);
}

/* Dark mode for Step 4 upgrade prompt */
[data-theme="dark"] .upgrade-prompt {
    background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
}

/* Ensure upgrade prompt looks good inside drawer */
.drawer-content .upgrade-prompt {
    margin: 0;
    border-radius: 0;
}

[data-theme="dark"] .drawer-content .upgrade-prompt {
    background: #1f2937;
}

[data-theme="dark"] .doc-count,
[data-theme="dark"] .doc-types {
    background: #374151;
    border-color: #60A5FA;
    color: #60A5FA;
}

[data-theme="dark"] .system-preview {
    background: #1f2937;
    border-color: #374151;
}

[data-theme="dark"] .upgrade-btn:hover {
    background: #2563eb;
}

/* Upgrade mini prompt for saved projects */
.upgrade-mini-prompt {
    padding: 0.75rem;
    background: linear-gradient(135deg, var(--light-grey-bg) 0%, var(--border-color) 100%);
    border-radius: 6px;
}

[data-theme="dark"] .upgrade-mini-prompt {
    background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
}

.upgrade-badge {
    background: var(--card-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.75rem;
    color: var(--primary-blue);
    font-weight: 600;
    border: 1px solid var(--primary-blue);
}

[data-theme="dark"] .upgrade-badge {
    background: #374151;
    border-color: #60A5FA;
    color: #60A5FA;
}

/* Error Message Styles */
.error-message {
    padding: 1rem;
    text-align: center;
    background: #ffeaa7;
    border-left: 4px solid #fdcb6e;
}

.error-message p {
    color: #636e72;
    margin: 0 0 0.5rem 0;
}

.retry-btn {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
}

.retry-btn:hover {
    background: var(--primary-blue-hover, #0056b3);
}

/* Dark mode styles for document drawer */
[data-theme="dark"] .document-drawer,
[data-theme="dark"] .documents-drawer {
    border-top-color: #374151;
}

[data-theme="dark"] .drawer-toggle {
    background: #374151;
    border-color: #4b5563;
    color: #f3f4f6;
}

[data-theme="dark"] .drawer-toggle:hover {
    background: #4b5563;
    border-color: #3b82f6;
}

[data-theme="dark"] .drawer-content,
[data-theme="dark"] .documents-content {
    background: #1f2937;
    border-color: #374151;
}

[data-theme="dark"] .documents-list {
    background: #1f2937;
}

[data-theme="dark"] .documents-header h5,
[data-theme="dark"] .doc-group h6 {
    color: #f3f4f6;
}

[data-theme="dark"] .doc-group {
    border-bottom-color: #374151;
}

[data-theme="dark"] .doc-item {
    background: #374151;
    border-color: #4b5563;
}

[data-theme="dark"] .doc-item:hover {
    background: #4b5563;
}

[data-theme="dark"] .doc-item h6 {
    color: #f3f4f6;
}

[data-theme="dark"] .doc-item p {
    color: #d1d5db;
}

[data-theme="dark"] .doc-actions .btn {
    background: #3b82f6;
    color: #ffffff;
}

[data-theme="dark"] .doc-actions .btn:hover {
    background: #2563eb;
}

[data-theme="dark"] .upgrade-message {
    background: #374151;
    border-color: #4b5563;
    color: #f3f4f6;
}

[data-theme="dark"] .upgrade-message h5 {
    color: #f3f4f6;
}

[data-theme="dark"] .upgrade-message p {
    color: #d1d5db;
}

[data-theme="dark"] .loading-spinner {
    border-color: #4b5563;
    border-top-color: #3b82f6;
}

/* Mobile responsiveness for document drawer */
@media (max-width: 768px) {
    .drawer-toggle {
        font-size: 0.8rem;
        padding: 0.6rem 0.8rem;
    }

    .upgrade-stats {
        flex-direction: column;
        gap: 0.5rem;
    }

    .upgrade-benefits ul {
        grid-template-columns: 1fr;
    }

    .doc-item {
    }

    .spec-label {
        margin-right: 0;
    }

    .spec-value {
        text-align: left;
    }

    .doc-type {
        align-self: flex-end;
    }
}

/* ============================================
   NATIVE MOBILE APP EXPERIENCE - COMPREHENSIVE
   ============================================ */

/* Mobile Main Content Areas - Full Screen Usage */
@media (max-width: 768px) {
    main {
        /* Remove container padding - use full width */
        padding: 0 1rem; /* Only horizontal padding, no top padding */
        min-height: calc(100vh - 80px);
    }

    /* Mobile page sections get proper spacing */
    main > section,
    main > .step-content,
    main > .configurator-section {
        padding: 0 1rem; /* Only horizontal padding, remove top/bottom */
        margin-left: -1rem;
        margin-right: -1rem;
        margin-bottom: 0;
        background: var(--card-bg);
    }

    main > section + section {
        margin-top: 0;
        border-top: 1px solid var(--border-color);
    }

    /* Cards use full width with side margins */
    .system-card,
    .result-card,
    .zone-card,
    .form-section {
        margin-left: 0;
        margin-right: 0;
        border-radius: 12px;
        border-left: none;
        border-right: none;
    }

    /* Step 2 header: keep Clear button inline on mobile */
    #step-2 .step-header {
        flex-direction: row !important;
        align-items: center !important;
        justify-content: space-between !important;
        margin-bottom: 0.75rem !important;
    }

    #step-2 .step-header h2 {
        font-size: 1.25rem !important;
        margin: 0 !important;
    }

    #step-2 .step-header #clear-zones-btn {
        padding: 0.5rem 0.875rem !important;
        font-size: 0.875rem !important;
        min-height: 40px;
        white-space: nowrap;
        display: flex !important;
        align-items: center;
        justify-content: center;
        gap: 0.25rem;
    }

    /* === MOBILE ZONE STEPPER === */
    .zone-stepper-nav {
        position: sticky !important;
        top: 96px !important; /* Below header + progress bar */
        left: 0;
        right: 0;
        background: var(--light-grey-bg);
        padding: 0.75rem 0;
        margin: 0 -1rem 1rem -1rem;
        z-index: 50;
        border-bottom: 1px solid var(--border-color);
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .zone-stepper-nav::-webkit-scrollbar {
        display: none;
    }

    .zone-pills {
        display: flex;
        gap: 0.5rem;
        padding: 0 1rem;
        min-width: min-content;
    }

    .zone-pill {
        flex: 0 0 auto;
        min-width: 80px;
        padding: 0.625rem 1rem;
        background: var(--card-bg);
        border: 2px solid var(--border-color);
        border-radius: 20px;
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--secondary-text);
        text-align: center;
        cursor: pointer;
        transition: all 0.2s ease;
        white-space: nowrap;
        user-select: none;
        -webkit-tap-highlight-color: transparent;
    }

    .zone-pill:active {
        transform: scale(0.95);
    }

    .zone-pill.active {
        background: var(--primary-blue);
        border-color: var(--primary-blue);
        color: white;
        box-shadow: 0 2px 8px rgba(96, 165, 250, 0.3);
    }

    .zone-pill.complete {
        border-color: var(--accent-green);
        color: var(--accent-green);
    }

    .zone-pill.complete.active {
        background: var(--accent-green);
        border-color: var(--accent-green);
        color: white;
    }

    .zone-pill-checkmark {
        display: inline-block;
        margin-left: 0.25rem;
        font-size: 0.75rem;
    }

    /* Hide all zones except active on mobile */
    #zones-container .zone-row {
        display: none !important;
    }

    #zones-container .zone-row.active {
        display: block !important;
    }

    /* Zone navigation buttons - override nav-btn styles */
    .zone-nav-btn {
        flex: 1;
        padding: 1rem !important;
        font-size: 1rem !important;
        font-weight: 600 !important;
        border-radius: 12px !important;
        cursor: pointer;
        transition: all 0.2s ease;
        display: flex !important;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        min-height: 52px !important;
        -webkit-tap-highlight-color: transparent;
    }

    .zone-nav-btn:active {
        transform: scale(0.98) !important;
    }

    /* Previous button - always secondary style */
    .zone-nav-btn.prev {
        background: var(--card-bg) !important;
        border: 2px solid var(--border-color) !important;
        color: var(--base-text) !important;
    }

    /* Next button - changes based on context */
    .zone-nav-btn.next {
        background: var(--card-bg) !important;
        border: 2px solid var(--accent-green) !important;
        color: var(--accent-green) !important;
        box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15) !important;
    }

    /* When next button is for zone navigation */
    .zone-nav-btn.next.zone-nav {
        background: var(--card-bg) !important;
        border: 2px solid var(--accent-green) !important;
        color: var(--accent-green) !important;
    }

    /* When next button is for step navigation */
    .zone-nav-btn.next.next-step {
        background: var(--primary-blue) !important;
        border: 2px solid var(--primary-blue) !important;
        color: white !important;
        box-shadow: 0 2px 8px rgba(96, 165, 250, 0.3) !important;
    }

    .zone-nav-btn:disabled {
        opacity: 0.5 !important;
        cursor: not-allowed !important;
    }

    /* === MOBILE STEP 3: DISTRIBUTION BOXES === */
    #distro-options-container {
        gap: 0.75rem !important;
        padding: 0 !important;
    }

    .distro-option {
        background: var(--card-bg);
        border: 1px solid var(--border-color) !important;
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        padding: 0.875rem 1rem !important;
        margin: 0 -1rem;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        justify-content: space-between !important;
        gap: 1rem !important;
        grid-template-columns: unset !important;
    }

    .distro-option:active {
        transform: scale(0.995);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    }

    /* "No Distribution Box" option styling */
    #distro-none-option {
        border-left: 4px solid var(--secondary-text) !important;
        cursor: pointer;
    }

    #distro-none-option.selected {
        border-left: 4px solid var(--accent-green) !important;
        border-color: var(--accent-green) !important;
        background: linear-gradient(90deg, rgba(16, 185, 129, 0.05) 0%, var(--card-bg) 10%);
        box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15) !important;
    }

    #distro-none-option label {
        font-size: 1rem !important;
        font-weight: 600 !important;
        color: var(--base-text);
    }

    #distro-none-btn {
        padding: 0.75rem 1.5rem !important;
        font-size: 1rem !important;
        font-weight: 600 !important;
        border-radius: 12px !important;
        min-height: 44px;
        text-align: center !important;
        display: inline-block !important;
    }

    /* Distribution box options with stepper */
    .distro-option.selected {
        border-left: 4px solid var(--primary-blue) !important;
        border-color: var(--primary-blue) !important;
        background: linear-gradient(90deg, rgba(96, 165, 250, 0.05) 0%, var(--card-bg) 10%);
        box-shadow: 0 2px 8px rgba(96, 165, 250, 0.15) !important;
    }

    .distro-label-wrapper {
        display: flex;
        flex-direction: row !important;
        align-items: center !important;
        gap: 0.5rem;
        flex: 1;
    }

    .distro-label-wrapper label {
        font-size: 0.95rem !important;
        font-weight: 600 !important;
        color: var(--base-text);
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin: 0 !important;
    }

    /* Enhanced stepper for mobile */
    .custom-stepper {
        display: flex !important;
        align-items: center;
        justify-content: center;
        gap: 0;
        border: 2px solid var(--border-color) !important;
        border-radius: 10px !important;
        overflow: hidden;
        background: var(--light-grey-bg);
        min-height: 44px;
        flex-shrink: 0;
    }

    .stepper-btn {
        flex: 0 0 44px;
        width: 44px;
        height: 44px;
        padding: 0 !important;
        font-size: 1.5rem !important;
        font-weight: 700 !important;
        background: var(--card-bg) !important;
        color: var(--primary-blue) !important;
        border: none !important;
        cursor: pointer;
        transition: all 0.2s ease;
        -webkit-tap-highlight-color: transparent;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .stepper-btn:active {
        background: var(--primary-blue) !important;
        color: white !important;
        transform: scale(0.95);
    }

    .stepper-btn:disabled {
        opacity: 0.3 !important;
        color: var(--secondary-text) !important;
    }

    .distro-quantity-input {
        flex: 0 0 48px !important;
        width: 48px !important;
        height: 44px;
        text-align: center;
        border: none !important;
        border-left: 2px solid var(--border-color) !important;
        border-right: 2px solid var(--border-color) !important;
        padding: 0 !important;
        background: var(--card-bg) !important;
        color: var(--base-text);
        font-weight: 700 !important;
        font-size: 1.1rem !important;
        line-height: 44px;
        pointer-events: none !important;
        user-select: none !important;
    }

    /* Connection type selector */
    .connection-type-selector {
        background: var(--card-bg);
        border: 1px solid var(--border-color) !important;
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        padding: 0.875rem 1rem !important;
        margin: 0.5rem -1rem 0 -1rem !important;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    }

    .connection-type-selector label {
        font-size: 0.95rem !important;
        font-weight: 600 !important;
        margin-bottom: 0.625rem !important;
        display: block;
    }

    .radio-group {
        display: flex;
        gap: 0.625rem;
    }

    .radio-label {
        flex: 1;
        padding: 0.625rem 0.875rem !important;
        border: 2px solid var(--border-color) !important;
        border-radius: 10px !important;
        text-align: center;
        font-size: 0.95rem !important;
        font-weight: 600 !important;
        cursor: pointer;
        transition: all 0.2s ease;
        background: var(--card-bg);
        color: var(--base-text);
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .radio-input:checked + .radio-label {
        background: var(--primary-blue) !important;
        border-color: var(--primary-blue) !important;
        color: white !important;
        box-shadow: 0 2px 8px rgba(96, 165, 250, 0.3);
    }

    .radio-input {
        display: none;
    }

    /* Required message styling */
    .distro-required-message {
        background: var(--card-bg);
        border: 2px solid var(--primary-blue) !important;
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        padding: 0.75rem 1rem !important;
        margin: 0 -1rem 0.5rem -1rem !important;
        font-size: 0.8rem !important;
        line-height: 1.4;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    }

    /* === iOS-STYLE ZONE CARDS === */
    .zone-card {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-left: none !important;
        border-right: none !important;
        border-radius: 0 !important;
        padding: 1.25rem 1rem;
        margin-bottom: 0.5rem;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
        position: relative;
        overflow: hidden;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* Elevated state on interaction */
    .zone-card:active {
        transform: scale(0.995);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    }

    /* Zone card entrance animation */
    .zone-row {
        animation: zoneCardSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
    }

    @keyframes zoneCardSlideIn {
        from {
            opacity: 0;
            transform: translateY(20px) scale(0.95);
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }

    /* Stagger animation for multiple zones */
    .zone-row:nth-child(1) { animation-delay: 0.05s; }
    .zone-row:nth-child(2) { animation-delay: 0.1s; }
    .zone-row:nth-child(3) { animation-delay: 0.15s; }
    .zone-row:nth-child(4) { animation-delay: 0.2s; }
    .zone-row:nth-child(5) { animation-delay: 0.25s; }
    .zone-row:nth-child(6) { animation-delay: 0.3s; }
    .zone-row:nth-child(7) { animation-delay: 0.35s; }
    .zone-row:nth-child(8) { animation-delay: 0.4s; }

    /* Completion state with visual feedback */
    .zone-card.complete {
        border-color: var(--accent-green) !important;
        border-left: 4px solid var(--accent-green) !important;
        border-right: none !important;
        background: linear-gradient(90deg, rgba(16, 185, 129, 0.05) 0%, var(--card-bg) 10%);
        box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
    }

    /* Completion checkmark badge */
    .zone-card.complete::before {
        content: '✓';
        position: absolute;
        top: 1rem;
        right: 1rem;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--accent-green);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.75rem;
        font-weight: 700;
        box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
        animation: checkmarkPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes checkmarkPop {
        0% { transform: scale(0); opacity: 0; }
        50% { transform: scale(1.2); }
        100% { transform: scale(1); opacity: 1; }
    }

    /* Zone header styling */
    .zone-header {
        margin-bottom: 1rem;
        padding-bottom: 0.75rem;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .zone-label {
        font-size: 1rem;
        font-weight: 700;
        color: var(--primary-blue);
        letter-spacing: -0.01em;
    }

    .zone-card.complete .zone-label {
        color: var(--accent-green);
    }

    /* Zone fields layout */
    .zone-fields {
        display: flex;
        flex-direction: column;
        gap: 0.3rem;
    }

    /* Reduce form-group margin within zone fields */
    .zone-fields .form-group {
        margin-bottom: 0.5rem;
        width: 100%;
    }

    .zone-fields .form-group:last-child {
        margin-bottom: 0;
    }

    /* Ensure all inputs/selects within zone fields are full width */
    .zone-fields .form-group input,
    .zone-fields .form-group select,
    .zone-fields .form-group .select-wrapper {
        width: 100% !important;
        max-width: 100% !important;
    }

    /* FORCE REMOVE swipe to delete - override any cached styles */
    .zone-card::after,
    .zone-row:first-child .zone-card::after {
        content: none !important;
        display: none !important;
    }

    /* === GOOD/BETTER/BEST HORIZONTAL CAROUSEL === */
    #gbb-container {
        display: flex;
        flex-direction: row;
        gap: 0;
        margin: 0 -1rem 2rem -1rem;
        padding: 1rem 0;
        overflow-x: auto;
        overflow-y: visible;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE/Edge */
    }

    /* Hide scrollbar */
    #gbb-container::-webkit-scrollbar {
        display: none;
    }

    /* System cards in carousel - CONDENSED for mobile viewport */
    #gbb-container > .system-card {
        flex: 0 0 85%;
        scroll-snap-align: center;
        scroll-snap-stop: always;
        margin: 0 0.5rem;
        padding: 0.875rem; /* Reduced from 1.5rem */
        border-radius: 16px;
        border: 2px solid var(--border-color);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    /* Condense all system cards on mobile */
    .system-card {
        padding: 0.875rem !important;
    }

    /* Compact card header */
    .system-card .card-header {
        margin-bottom: 0.5rem;
        padding-bottom: 0.5rem;
    }

    .system-card .system-title {
        font-size: 1.1rem;
        margin: 0 0 0.25rem 0;
        line-height: 1.3;
    }

    .system-card .system-subtitle {
        font-size: 0.8rem;
        margin: 0;
    }

    /* Compact tech grid - two columns, tight spacing */
    .system-card .tech-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.375rem !important;
        padding: 0.5rem !important;
        margin: 0.5rem 0 !important;
        font-size: 0.85rem;
    }

    .system-card .tech-item {
        padding: 0.375rem !important;
        font-size: 0.85rem;
    }

    .system-card .tech-label {
        font-size: 0.7rem;
        font-weight: 600;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .system-card .tech-value {
        font-size: 0.8rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    /* Hide/condense less critical info on mobile */
    .system-card .effective-btu-note {
        display: none;
    }

    /* Condense or hide view detail message */
    .system-card div[style*="padding: 1rem"] {
        padding: 0.5rem !important;
        font-size: 0.8rem !important;
        margin: 0.5rem 0 !important;
    }

    .system-card div[style*="padding: 1rem"] p {
        font-size: 0.8rem !important;
        margin: 0 !important;
    }

    /* Compact action buttons */
    .system-card .action-buttons,
    .system-card .card-actions {
        margin-top: 0.75rem;
        gap: 0.5rem;
    }

    .system-card .action-buttons button,
    .system-card .card-actions button {
        padding: 0.625rem 1rem;
        font-size: 0.85rem;
        min-height: 44px;
    }

    /* Compact brand logo */
    .system-card .brand-logo {
        max-height: 20px;
        max-width: 60px;
    }

    /* Reduce spacing in component lists */
    .system-card .component-list {
        margin: 0.5rem 0;
    }

    .system-card .component-item {
        padding: 0.5rem;
        font-size: 0.85rem;
        margin-bottom: 0.375rem;
    }

    /* First card (Better) - add left margin */
    #gbb-container > .system-card:first-child {
        margin-left: 1rem;
    }

    /* Last card (Good) - add right margin */
    #gbb-container > .system-card:last-child {
        margin-right: 1rem;
    }

    /* All cards same size on mobile */
    #gbb-container > .system-card.is-best,
    #gbb-container > .system-card.is-better,
    #gbb-container > .system-card.is-good {
        flex: 0 0 85%;
        transform: none;
    }

    /* Best card styling */
    #gbb-container > .system-card.is-best {
        border: 3px solid #FFD700;
        box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3);
    }

    /* Better card styling */
    #gbb-container > .system-card.is-better {
        border: 2px solid #C0C0C0;
        box-shadow: 0 4px 12px rgba(192, 192, 192, 0.2);
    }

    /* Good card styling */
    #gbb-container > .system-card.is-good {
        border: 2px solid #CD7F32;
        box-shadow: 0 4px 12px rgba(205, 127, 50, 0.2);
    }

    /* Rank badges - compact on mobile */
    .rank-badge {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
        border-radius: 0 16px 0 12px;
    }

    /* Add carousel pagination dots */
    #gbb-container::after {
        content: '';
        position: absolute;
        bottom: -1.5rem;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        gap: 0.5rem;
        pointer-events: none;
    }

    /* Scroll progress indicator */
    #results-container {
        position: relative;
    }

    /* Add pagination dots container after GBB */
    #gbb-container + .gbb-pagination {
        display: flex;
        justify-content: center;
        gap: 0.5rem;
        margin: -1rem 0 2rem 0;
        padding: 0.5rem 0;
    }

    .gbb-pagination-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: rgba(0, 0, 0, 0.2);
        transition: all 0.3s ease;
    }

    .gbb-pagination-dot.active {
        width: 24px;
        border-radius: 4px;
        background: var(--primary-blue);
    }

    /* Swipe hint for carousel */
    #gbb-container::before {
        content: '← Swipe to compare →';
        position: absolute;
        top: -2rem;
        left: 50%;
        transform: translateX(-50%);
        background: var(--primary-blue);
        color: white;
        padding: 0.5rem 1rem;
        border-radius: 20px;
        font-size: 0.8rem;
        font-weight: 600;
        opacity: 0;
        animation: carouselHint 4s ease-in-out 0.5s;
        pointer-events: none;
        z-index: 10;
    }

    @keyframes carouselHint {
        0%, 100% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
        10%, 30% { opacity: 1; transform: translateX(-50%) translateY(0); }
    }

    /* Other Options header styling */
    #other-options-header {
        font-size: 1.25rem;
        margin: 2rem 0 1rem 0;
        padding-bottom: 0.75rem;
        border-bottom: 2px solid var(--border-color);
        color: var(--base-text);
    }

    /* === SKELETON LOADING STATES === */
    .skeleton-card {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 16px;
        padding: 1.5rem 1rem;
        margin-bottom: 1rem;
        animation: skeletonFadeIn 0.3s ease;
    }

    @keyframes skeletonFadeIn {
        from { opacity: 0; transform: translateY(10px); }
        to { opacity: 1; transform: translateY(0); }
    }

    /* Skeleton shimmer effect */
    .skeleton {
        background: linear-gradient(
            90deg,
            rgba(0, 0, 0, 0.06) 0%,
            rgba(0, 0, 0, 0.1) 50%,
            rgba(0, 0, 0, 0.06) 100%
        );
        background-size: 200% 100%;
        animation: shimmer 1.5s infinite;
        border-radius: 8px;
    }

    @keyframes shimmer {
        0% { background-position: 200% 0; }
        100% { background-position: -200% 0; }
    }

    /* Skeleton elements */
    .skeleton-title {
        height: 24px;
        width: 70%;
        margin-bottom: 1rem;
    }

    .skeleton-subtitle {
        height: 16px;
        width: 40%;
        margin-bottom: 1.5rem;
    }

    .skeleton-text {
        height: 14px;
        width: 100%;
        margin-bottom: 0.75rem;
    }

    .skeleton-text.short {
        width: 60%;
    }

    .skeleton-button {
        height: 44px;
        width: 100%;
        margin-top: 1rem;
        border-radius: 12px;
    }

    .skeleton-badge {
        height: 32px;
        width: 80px;
        position: absolute;
        top: -1px;
        right: -1px;
        border-radius: 0 16px 0 12px;
    }

    /* Skeleton grid for specs */
    .skeleton-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
        margin: 1rem 0;
    }

    .skeleton-grid-item {
        height: 40px;
    }

    /* Loading state container */
    #loading-skeleton {
        display: none;
    }

    #loading-skeleton.active {
        display: block;
    }

    /* Fade out skeleton when results load */
    .skeleton-card.fade-out {
        animation: skeletonFadeOut 0.3s ease forwards;
    }

    @keyframes skeletonFadeOut {
        from { opacity: 1; transform: scale(1); }
        to { opacity: 0; transform: scale(0.95); }
    }

    /* Smooth results entrance */
    .system-card {
        animation: resultsSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
    }

    @keyframes resultsSlideIn {
        from {
            opacity: 0;
            transform: translateY(20px) scale(0.95);
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }

    /* Stagger results animation */
    #gbb-container > .system-card:nth-child(1) {
        animation-delay: 0.1s;
    }

    #gbb-container > .system-card:nth-child(2) {
        animation-delay: 0.15s;
    }

    #gbb-container > .system-card:nth-child(3) {
        animation-delay: 0.2s;
    }

    /* === SPRING ANIMATIONS & MICRO-INTERACTIONS === */

    /* Spring-based button interactions */
    button,
    .btn,
    .nav-btn {
        transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
                    box-shadow 0.2s ease,
                    background-color 0.2s ease;
    }

    button:active,
    .btn:active,
    .nav-btn:active {
        transform: scale(0.96);
        transition: transform 0.1s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    /* Success bounce animation for buttons */
    button.success-bounce {
        animation: successBounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes successBounce {
        0% { transform: scale(1); }
        30% { transform: scale(1.1); }
        50% { transform: scale(0.95); }
        70% { transform: scale(1.05); }
        100% { transform: scale(1); }
    }

    /* Progress step transition with spring */
    .progress-step {
        transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .progress-step.active .step-number {
        animation: stepActivate 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes stepActivate {
        0% { transform: scale(0.8); opacity: 0; }
        50% { transform: scale(1.15); }
        100% { transform: scale(1); opacity: 1; }
    }

    /* Form input spring focus */
    input:focus,
    select:focus,
    textarea:focus {
        animation: inputFocusPulse 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes inputFocusPulse {
        0% { transform: scale(1); }
        50% { transform: scale(1.02); }
        100% { transform: scale(1); }
    }

    /* Navigation button spring entrance */
    .nav-btn:not(.hidden) {
        animation: navButtonSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes navButtonSlideIn {
        from {
            opacity: 0;
            transform: translateY(20px) scale(0.9);
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }

    /* Ripple effect container */
    .ripple-container {
        position: relative;
        overflow: hidden;
    }

    .ripple {
        position: absolute;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.5);
        transform: scale(0);
        animation: ripple 0.6s ease-out;
        pointer-events: none;
    }

    @keyframes ripple {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }

    /* Smooth step transitions with slide effect */
    .step-content:not(.hidden) {
        animation: stepSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes stepSlideIn {
        from {
            opacity: 0;
            transform: translateX(30px) scale(0.98);
        }
        to {
            opacity: 1;
            transform: translateX(0) scale(1);
        }
    }

    /* Select dropdown spring open */
    .select-wrapper select:focus {
        animation: selectSpring 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes selectSpring {
        0% { transform: scale(1); }
        40% { transform: scale(1.03); }
        100% { transform: scale(1); }
    }

    /* Card hover/tap with spring */
    .system-card,
    .zone-card {
        transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
                    box-shadow 0.2s ease;
    }

    /* === TOAST NOTIFICATIONS & VISUAL FEEDBACK === */

    /* Toast container */
    .toast-container {
        position: fixed;
        top: 80px; /* Below fixed progress bar */
        left: 50%;
        transform: translateX(-50%);
        z-index: 1000;
        pointer-events: none;
    }

    /* Toast notification */
    .toast {
        background: var(--card-bg);
        color: var(--base-text);
        padding: 1rem 1.5rem;
        border-radius: 12px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15),
                    0 0 0 1px rgba(0, 0, 0, 0.1);
        margin-bottom: 0.5rem;
        display: flex;
        align-items: center;
        gap: 0.75rem;
        min-width: 280px;
        max-width: 90vw;
        animation: toastSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        pointer-events: auto;
    }

    @keyframes toastSlideIn {
        from {
            opacity: 0;
            transform: translateY(-20px) scale(0.9);
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }

    .toast.toast-exit {
        animation: toastSlideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }

    @keyframes toastSlideOut {
        from {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
        to {
            opacity: 0;
            transform: translateY(-10px) scale(0.95);
        }
    }

    /* Toast types */
    .toast.success {
        background: linear-gradient(135deg, #10b981 0%, #059669 100%);
        color: white;
    }

    .toast.error {
        background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
        color: white;
    }

    .toast.info {
        background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
        color: white;
    }

    .toast.warning {
        background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
        color: white;
    }

    /* Toast icon */
    .toast-icon {
        width: 24px;
        height: 24px;
        flex-shrink: 0;
    }

    .toast-message {
        flex: 1;
        font-size: 0.95rem;
        font-weight: 500;
    }

    /* Success checkmark animation */
    .success-checkmark {
        display: inline-block;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--accent-green);
        position: relative;
        animation: successPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .success-checkmark::after {
        content: '✓';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        color: white;
        font-size: 14px;
        font-weight: 700;
    }

    @keyframes successPop {
        0% { transform: scale(0); }
        50% { transform: scale(1.2); }
        100% { transform: scale(1); }
    }

    /* Error shake animation */
    .error-shake {
        animation: errorShake 0.5s ease;
    }

    @keyframes errorShake {
        0%, 100% { transform: translateX(0); }
        10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
        20%, 40%, 60%, 80% { transform: translateX(10px); }
    }

    /* Pulse animation for important elements */
    .pulse {
        animation: pulse 2s ease infinite;
    }

    @keyframes pulse {
        0%, 100% { transform: scale(1); opacity: 1; }
        50% { transform: scale(1.05); opacity: 0.9; }
    }

    /* Shimmer effect for highlights */
    .shimmer {
        position: relative;
        overflow: hidden;
    }

    .shimmer::after {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(
            90deg,
            transparent 0%,
            rgba(255, 255, 255, 0.3) 50%,
            transparent 100%
        );
        animation: shimmerSlide 2s infinite;
    }

    @keyframes shimmerSlide {
        to {
            left: 100%;
        }
    }

    /* Loading dots animation */
    .loading-dots {
        display: inline-flex;
        gap: 4px;
    }

    .loading-dots span {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: currentColor;
        animation: loadingBounce 1.4s ease-in-out infinite both;
    }

    .loading-dots span:nth-child(1) { animation-delay: -0.32s; }
    .loading-dots span:nth-child(2) { animation-delay: -0.16s; }

    @keyframes loadingBounce {
        0%, 80%, 100% { transform: scale(0); }
        40% { transform: scale(1); }
    }

    /* Native app-like smooth transitions */
    * {
        -webkit-tap-highlight-color: rgba(96, 165, 250, 0.1);
    }

    /* Smooth page transitions */
    .step-content,
    .tab-content {
        animation: mobileSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    @keyframes mobileSlideIn {
        from {
            opacity: 0;
            transform: translateX(20px);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }

    /* Native-like button feedback */
    button:active,
    .btn:active,
    .nav-btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }

    /* Modals become bottom sheets */
    .modal {
        align-items: flex-end;
        padding: 0;
    }

    .modal-content {
        border-radius: 20px 20px 0 0;
        max-height: 90vh;
        width: 100%;
        margin: 0;
        animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        padding-bottom: calc(1rem + env(safe-area-inset-bottom));
    }

    @keyframes slideUp {
        from {
            transform: translateY(100%);
        }
        to {
            transform: translateY(0);
        }
    }

    /* Native navigation buttons - FORCE FIXED to bottom */
    .navigation-buttons {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        background: var(--card-bg) !important;
        border-top: 1px solid var(--border-color) !important;
        padding: 0.75rem 1rem !important;
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom)) !important;
        z-index: 50 !important;
        display: flex !important;
        gap: 0.75rem !important;
        justify-content: center !important;
        box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.08) !important;
        margin: 0 !important;
    }

    .navigation-buttons .nav-btn {
        flex: 0 1 auto !important;
        max-width: 200px !important;
        justify-content: center !important;
        padding: 0.75rem 1rem !important;
        font-size: 0.95rem !important;
        border-radius: 12px !important;
        font-weight: 600 !important;
        min-height: 48px !important;
    }

    /* Touch-friendly inputs */
    input,
    select,
    textarea {
        font-size: 16px !important; /* Prevents zoom on iOS */
        padding: 0.875rem !important;
        border-radius: 10px;
    }

    /* Larger checkboxes and radio buttons */
    input[type="checkbox"],
    input[type="radio"] {
        width: 24px;
        height: 24px;
        margin-right: 0.75rem;
    }

    /* Native-like lists */
    .component-list,
    .zone-list,
    .system-list {
        margin-left: -1rem;
        margin-right: -1rem;
    }

    .component-item,
    .zone-item,
    .system-item {
        padding: 1rem;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }

    /* Native loading states */
    .loading-state,
    .spinner {
        background: transparent;
    }

    /* Bottom safe area for fixed elements */
    footer {
        padding-bottom: calc(1rem + env(safe-area-inset-bottom));
    }
}

/* Extra small phones - maximum space utilization */
@media (max-width: 480px) {
    main {
        padding: 0 0.75rem; /* Only horizontal padding, no top padding */
    }

    main > section,
    main > .step-content {
        padding: 0 0.75rem; /* Only horizontal padding */
        margin-left: -0.75rem;
        margin-right: -0.75rem;
        margin-bottom: 0;
    }

    /* Smaller touch targets acceptable on tiny screens */
    .btn-sm,
    .compact-btn {
        min-height: 40px;
        font-size: 0.9rem;
        padding: 0.625rem 1rem;
    }

    /* Stack everything vertically */
    .form-grid,
    .button-group,
    .action-buttons {
        grid-template-columns: 1fr !important;
        flex-direction: column;
    }

    .navigation-buttons {
        position: fixed !important;
        bottom: 0 !important;
        padding: 0.75rem !important;
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom)) !important;
    }
}

/* Landscape phones - optimize horizontal space */
@media (max-width: 900px) and (orientation: landscape) {
    header {
        padding: 0.5rem 1rem;
    }

    .header-nav {
        flex-wrap: nowrap;
    }

    main {
        padding: 0.75rem 1rem;
    }

    .navigation-buttons {
        position: fixed !important;
        bottom: 0 !important;
        padding: 0.75rem 1rem !important;
    }
}

/* ========================================
   COOKIE CONSENT BANNER
======================================== */

.cookie-consent-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(17, 24, 39, 0.98), rgba(17, 24, 39, 0.95));
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.cookie-consent-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cookie-consent-text {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    flex: 1;
}

.cookie-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.cookie-icon i {
    width: 20px;
    height: 20px;
}

.cookie-consent-text h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--base-text);
}

.cookie-consent-text p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--secondary-text);
}

.cookie-consent-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.cookie-consent-actions .btn {
    min-width: 100px;
    font-size: 0.9rem;
    padding: 0.625rem 1.25rem;
    white-space: nowrap;
}

.cookie-privacy-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.875rem;
    white-space: nowrap;
    transition: color 0.2s ease;
}

.cookie-privacy-link:hover {
    color: var(--accent-blue-light);
    text-decoration: underline;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .cookie-consent-content {
        flex-direction: column;
        padding: 1.25rem 1rem;
        gap: 1.25rem;
        align-items: stretch;
    }

    .cookie-consent-text {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .cookie-consent-text h4 {
        font-size: 1rem;
    }

    .cookie-consent-text p {
        font-size: 0.85rem;
    }

    .cookie-consent-actions {
        flex-direction: column;
        width: 100%;
    }

    .cookie-consent-actions .btn {
        width: 100%;
        min-width: unset;
    }

    .cookie-privacy-link {
        text-align: center;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .cookie-consent-content {
        padding: 1rem 0.75rem;
        padding-bottom: calc(1rem + env(safe-area-inset-bottom));
    }

    .cookie-icon {
        width: 36px;
        height: 36px;
    }

    .cookie-icon i {
        width: 18px;
        height: 18px;
    }
}