/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

:root {
    /* Colors */
    --primary-color: #ff3366;
    --secondary-color: #00ff88;
    --dark-bg: #000000;
    --card-bg: #0a0a0a;
    --border-color: #222;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --gradient-thermal: linear-gradient(135deg, #000033, #ff0000, #ffff00);
    --gradient-night: linear-gradient(135deg, #001100, #00ff00);

    /* Spacing System - 8px base grid */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    --space-5xl: 128px;

    /* Section Spacing */
    --section-padding-y: var(--space-5xl);
    --section-padding-y-mobile: var(--space-3xl);
    --section-gap: var(--space-3xl);

    /* Component Spacing */
    --container-padding: var(--space-lg);
    --card-padding: var(--space-xl);
    --card-gap: var(--space-xl);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: calc(70px + env(safe-area-inset-top, 0px)); /* Account for fixed navbar and Smart App Banner */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

/* ========================================
   Navigation Bar - Professional & SEO Optimized
   ======================================== */

.navbar {
    position: fixed;
    top: env(safe-area-inset-top, 0);
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.98);
    border-bottom: 1px solid rgba(255, 51, 102, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar.scroll-down {
    transform: translateY(-100%);
}

.navbar.scroll-up {
    transform: translateY(0);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 20px;
    transition: all 0.3s ease;
    z-index: 1001;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(255, 51, 102, 0.2);
}

.nav-logo:hover .logo-icon {
    transform: scale(1.05) rotate(-2deg);
    box-shadow: 0 4px 16px rgba(255, 51, 102, 0.4);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    list-style: none;
    margin: 0;
}

.nav-link {
    position: relative;
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 6px;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 51, 102, 0.08);
}

.nav-link:hover::before {
    transform: scaleX(1);
}

.nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 51, 102, 0.1);
}

.nav-link.active::before {
    transform: scaleX(1);
}

/* CTA Button in Navbar */
.nav-cta {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Switcher Styles */
.language-switcher {
    position: relative;
}

.btn-lang {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-lang:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-lang svg {
    width: 18px;
    height: 18px;
    opacity: 0.8;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: #1a1a1a;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    overflow: hidden;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 14px;
}

.lang-option:hover {
    background: rgba(255, 255, 255, 0.05);
}

.lang-option.active {
    background: rgba(255, 51, 102, 0.1);
    color: var(--primary-color);
}

.lang-option .flag {
    font-size: 20px;
    line-height: 1;
}

.lang-option span:last-child {
    flex: 1;
}

.btn-nav-primary {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--primary-color), #ff6b6b);
    border: none;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(255, 51, 102, 0.3);
}

.btn-nav-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 51, 102, 0.5);
}

/* Mobile Toggle Button */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger {
    width: 30px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active .hamburger:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
}

.nav-toggle.active .hamburger:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.nav-toggle.active .hamburger:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
}

/* ========================================
   Responsive Navigation
   ======================================== */

@media (max-width: 968px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 0;
        padding: 24px;
        border-bottom: 1px solid rgba(255, 51, 102, 0.2);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

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

    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 4px;
    }

    .nav-link {
        width: 100%;
        padding: 14px 20px;
        font-size: 16px;
        text-align: left;
        border-radius: 8px;
    }

    .nav-link::before {
        left: 20px;
        right: 20px;
    }

    .nav-cta {
        width: 100%;
        margin-top: 16px;
        padding-top: 16px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .btn-nav-primary {
        width: 100%;
        padding: 14px 24px;
        font-size: 16px;
        justify-content: center;
        display: flex;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 16px;
        height: 60px;
    }

    body {
        padding-top: calc(60px + env(safe-area-inset-top, 0px)); /* Mobile navbar + Smart App Banner space */
    }

    .nav-menu {
        top: calc(60px + env(safe-area-inset-top, 0px));
        max-height: calc(100vh - 60px - env(safe-area-inset-top, 0px));
    }

    .logo-text {
        font-size: 18px;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 14px var(--space-xl);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #ff6b6b);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 51, 102, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.btn-upload {
    margin-top: 16px;
}

.btn-small {
    padding: 8px 20px;
    font-size: 14px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-4xl) var(--container-padding);
    background: #000000;
    position: relative;
    overflow: hidden;
}


.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, #ffffff, var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-3xl);
}

.device-mockup {
    max-width: 300px;
    margin: 0 auto;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

#heroCanvas {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

/* Demo Section */
.demo-section {
    padding: var(--space-lg) var(--container-padding) var(--section-padding-y);
    background: #000000;
}

.demo-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.demo-container {
    max-width: 900px;
    margin: 0 auto;
}

/* Upload Area */
.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 16px;
    padding: var(--space-3xl) var(--space-2xl);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: var(--card-bg);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(255, 51, 102, 0.05);
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.upload-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.upload-content p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Preview Container */
.preview-container {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.canvas-wrapper {
    position: relative;
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 40px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Before/After Container */
.before-after-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.image-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: center;
    margin: 0;
}

.before-section .section-title {
    color: var(--text-secondary);
}

.after-section .section-title {
    color: var(--primary-color);
}

.image-box {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.before-section .image-box:hover {
    border-color: var(--text-secondary);
    box-shadow: 0 4px 16px rgba(176, 176, 176, 0.2);
}

.after-section .image-box:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(255, 51, 102, 0.3);
}

.image-box canvas {
    max-width: 100%;
    max-height: 45vh;
    height: auto;
    display: block;
    border-radius: 8px;
    object-fit: contain;
}

/* Download Section */
.download-section {
    margin-bottom: 40px;
}

.download-section .section-title {
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 16px;
}

.download-box {
    display: flex;
    flex-direction: row;
    gap: 16px;
    justify-content: center;
    align-items: center;
}

.btn-download-action {
    flex: 1;
    max-width: 300px;
}

/* Responsive */
@media (max-width: 968px) {
    .before-after-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .image-box canvas {
        max-height: 50vh;
    }

    .download-box {
        flex-direction: column;
    }

    .btn-download-action {
        max-width: 100%;
        width: 100%;
    }
}

/* Intensity Control */
.intensity-control {
    margin-bottom: 40px;
    animation: fadeIn 0.3s ease;
}

.intensity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.intensity-header h3 {
    font-size: 1.25rem;
    margin: 0;
    color: var(--text-primary);
}

.intensity-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--secondary-color);
    min-width: 60px;
    text-align: right;
}

.intensity-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right,
        var(--card-bg) 0%,
        var(--primary-color) 50%,
        var(--secondary-color) 100%);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.intensity-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(255, 51, 102, 0.4);
    transition: all 0.3s ease;
}

.intensity-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 16px rgba(255, 51, 102, 0.6);
}

.intensity-slider::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

.intensity-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(255, 51, 102, 0.4);
    transition: all 0.3s ease;
}

.intensity-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 16px rgba(255, 51, 102, 0.6);
}

.intensity-slider::-moz-range-thumb:active {
    transform: scale(1.1);
}

/* Style Selector */
.style-selector {
    margin-bottom: var(--space-2xl);
}

.style-selector h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
    text-align: center;
}

.style-grid {
    display: flex;
    gap: var(--space-md);
    overflow-x: auto;
    overflow-y: hidden;
    padding: var(--space-sm) 0;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--card-bg);
}

.style-grid::-webkit-scrollbar {
    height: 8px;
}

.style-grid::-webkit-scrollbar-track {
    background: var(--card-bg);
    border-radius: 4px;
}

.style-grid::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.style-grid::-webkit-scrollbar-thumb:hover {
    background: #ff4477;
}

.style-tile {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 140px;
    flex-shrink: 0;
}

.style-tile:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.style-tile.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(255, 51, 102, 0.3);
}

.style-preview {
    width: 100%;
    height: 80px;
    border-radius: 8px;
    margin-bottom: 12px;
}

.style-tile span {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

/* App CTA Banner */
.app-cta-banner {
    background: linear-gradient(135deg, rgba(255, 51, 102, 0.1), rgba(0, 255, 136, 0.1));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
}

.app-cta-banner p {
    margin-bottom: 16px;
}

/* Features Section */
.features-section {
    padding: var(--section-padding-y) var(--container-padding);
    background: #000000;
}

.features-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: var(--space-3xl);
}

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

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: var(--card-padding);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Use Cases Section */
.use-cases-section {
    padding: var(--section-padding-y) var(--container-padding);
    background: #000000;
}

.use-cases-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--card-gap);
    max-width: 1000px;
    margin: 0 auto;
}

.use-case-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: var(--card-padding);
    transition: all 0.3s ease;
}

.use-case-card:hover {
    transform: translateY(-8px);
    border-color: var(--secondary-color);
}

.use-case-card h3 {
    font-size: 1.375rem;
    margin-bottom: 16px;
    color: var(--secondary-color);
}

.use-case-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* App Section */
.app-section {
    padding: var(--section-padding-y) var(--container-padding);
    background: #000000;
    text-align: center;
}

.app-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
}

.app-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-2xl);
    max-width: 900px;
    margin: var(--space-3xl) auto;
}

.app-feature {
    text-align: center;
}

.app-feature svg {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.app-feature h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.app-feature p {
    color: var(--text-secondary);
}

/* App Download */
.app-download {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 60px 0;
}

.store-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.store-badge:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.store-badge svg {
    width: 40px;
    height: 40px;
}

.store-text {
    text-align: left;
}

.store-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.store-title {
    font-size: 1.125rem;
    font-weight: 600;
}

/* QR Code */
.qr-code-container {
    margin-top: 40px;
    text-align: center;
}

#qrcode {
    display: inline-block;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

#qrcode img {
    display: block;
}

.qr-text {
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.qr-placeholder {
    display: inline-block;
    padding: 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.qr-placeholder p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* FAQ Section */
.faq-section {
    padding: var(--section-padding-y) var(--container-padding);
    background: #000000;
}

.faq-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--card-padding);
    margin-bottom: var(--space-lg);
    transition: all 0.3s ease;
}

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

.faq-item h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--secondary-color);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Footer */
.footer {
    background: #000000;
    border-top: 1px solid var(--border-color);
    padding: var(--space-3xl) var(--container-padding) var(--space-2xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.footer-links {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

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

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

.footer-disclaimer {
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding-y: var(--section-padding-y-mobile);
        --card-padding: var(--space-lg);
        --card-gap: var(--space-lg);
    }

    .hero {
        min-height: auto;
        padding: var(--space-3xl) var(--space-md);
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .demo-section,
    .features-section,
    .use-cases-section,
    .app-section,
    .faq-section {
        padding: var(--section-padding-y-mobile) var(--space-md);
    }

    .upload-area {
        padding: var(--space-2xl) var(--space-md);
    }

    .style-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: var(--space-md);
    }

    .style-tile {
        padding: var(--space-md);
    }

    .style-preview {
        height: 60px;
    }

    .action-buttons {
        flex-direction: column;
    }

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

    .footer-links {
        flex-direction: column;
        gap: var(--space-md);
    }

    .app-download {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 480px) {
    :root {
        --card-padding: var(--space-lg);
    }

    .style-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-card,
    .use-case-card,
    .faq-item {
        padding: var(--space-lg);
    }
}

/* Loading State */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Error Message */
.error-message {
    background: rgba(255, 51, 51, 0.1);
    border: 1px solid #ff3333;
    border-radius: 8px;
    padding: 16px;
    margin: 20px 0;
    color: #ff6666;
    text-align: center;
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: white;
}

/* Share Modal */
.share-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 20px;
}

.share-modal.show {
    opacity: 1;
}

.share-modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalSlideUp 0.3s ease;
}

@keyframes modalSlideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.share-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.share-modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.share-modal-close {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.share-modal-close:hover {
    background: rgba(255, 51, 102, 0.1);
    color: var(--primary-color);
}

.share-modal-body {
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.share-option {
    padding: 14px 20px;
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.share-option:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.share-option:active {
    transform: translateY(0);
}

@media (max-width: 480px) {
    .share-modal-body {
        grid-template-columns: 1fr;
    }

    .share-modal-header h3 {
        font-size: 1.25rem;
    }
}