/* ========================================
   Dice Art Generator - World-Class UI
   Premium Design System v2.0
   ======================================== */

/* Enhanced CSS Variables - Premium Design Tokens */
:root {
    /* Primary Colors - Refined Blue Palette */
    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;
    --color-primary-glow: rgba(59, 130, 246, 0.5);
    
    /* Accent Colors */
    --color-accent: #8b5cf6;
    --color-accent-light: #a78bfa;
    --color-success: #10b981;
    --color-success-light: #34d399;
    
    /* Neutral Colors - Refined Gray Scale */
    --color-dark: #0f172a;
    --color-gray-900: #1e293b;
    --color-gray-800: #334155;
    --color-gray-700: #475569;
    --color-gray-600: #64748b;
    --color-gray-500: #94a3b8;
    --color-gray-400: #cbd5e1;
    --color-gray-300: #e2e8f0;
    --color-gray-200: #f1f5f9;
    --color-gray-100: #f8fafc;
    --color-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Effects */
    --border-radius-sm: 6px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 40px var(--color-primary-glow);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-blur: blur(20px);
    
    /* Layout */
    --header-height: 72px;
    --max-width: 1280px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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


/* ========================================
   Header - Glassmorphism Style
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo - Enhanced */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-weight: 800;
    font-size: var(--font-size-xl);
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    font-size: 1.75rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

/* Navigation - Refined */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link {
    text-decoration: none;
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    position: relative;
    transition: all var(--transition-base);
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.08);
}

.nav-link.active {
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.1);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background var(--transition-base);
}

.mobile-menu-btn:hover {
    background: var(--color-gray-100);
}

.hamburger {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-gray-700);
    position: relative;
    transition: all var(--transition-base);
    border-radius: 2px;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 22px;
    height: 2px;
    background-color: var(--color-gray-700);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

.mobile-menu-btn.active .hamburger {
    background-color: transparent;
}

.mobile-menu-btn.active .hamburger::before {
    transform: rotate(45deg) translate(4px, 4px);
}

.mobile-menu-btn.active .hamburger::after {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* Mobile Responsive Header */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: var(--glass-blur);
        -webkit-backdrop-filter: var(--glass-blur);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-xs);
        border-bottom: 1px solid var(--color-gray-200);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: var(--spacing-md);
    }
}

body {
    padding-top: var(--header-height);
}


/* ========================================
   Hero Section - Interactive Demo with Comparison Slider
   ======================================== */

.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-3xl) var(--spacing-xl);
}

/* Animated Background Elements */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(16, 185, 129, 0.1) 0%, transparent 40%);
    animation: heroGlow 15s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(2%, 2%) rotate(1deg); }
    66% { transform: translate(-1%, 1%) rotate(-1deg); }
}

/* Floating Dice Background */
.hero::after {
    content: '🎲';
    position: absolute;
    font-size: 400px;
    opacity: 0.03;
    right: -100px;
    bottom: -100px;
    animation: floatDice 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes floatDice {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(10deg); }
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

/* Hero Content */
.hero-content {
    max-width: 540px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, var(--font-size-5xl));
    font-weight: 900;
    line-height: 1.1;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-title-gradient {
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 50%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    animation: fadeInUp 0.6s ease 0.2s both;
}

/* Hero Features - Pills Style */
.hero-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-300);
    transition: all var(--transition-base);
}

.hero-feature:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-feature-icon {
    color: var(--color-success);
    font-weight: 700;
}

/* Hero CTA Buttons */
.hero-cta-group {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.hero-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 60px var(--color-primary-glow), var(--shadow-xl);
}

.hero-cta:hover::before {
    left: 100%;
}

.hero-cta-arrow {
    transition: transform var(--transition-base);
}

.hero-cta:hover .hero-cta-arrow {
    transform: translateY(3px);
}

.hero-cta-play {
    font-size: 0.8em;
}

.hero-cta-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: none;
}

.hero-cta-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-lg);
}

/* Hero Privacy Note */
.hero-privacy {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    animation: fadeInUp 0.6s ease 0.5s both;
}

.hero-privacy-icon {
    font-size: var(--font-size-base);
}

/* Hero Visual - Demo Card */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-demo-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    box-shadow: 
        0 32px 64px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 480px;
}

/* Comparison Slider */
.hero-comparison {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    background: var(--color-gray-900);
}

.comparison-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
}

.comparison-before,
.comparison-after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.comparison-before {
    z-index: 1;
}

.comparison-after {
    z-index: 2;
    clip-path: inset(0 40% 0 0); /* Default: 60% Dice Art visible */
    transition: clip-path 0.05s ease-out;
}

.comparison-before canvas,
.comparison-after canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.comparison-label {
    position: absolute;
    bottom: 12px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.7);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 10;
}

.comparison-label-before {
    left: 12px;
}

.comparison-label-after {
    right: 12px;
}

/* Comparison Slider Handle */
.comparison-slider {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 60%; /* Default: 60% position (more Dice Art visible) */
    width: 4px;
    z-index: 10;
    cursor: ew-resize;
    transform: translateX(-50%);
}

.comparison-slider-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--color-white);
    transform: translateX(-50%);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.comparison-slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 44px;
    height: 44px;
    background: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.comparison-slider-handle:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.slider-arrow-left,
.slider-arrow-right {
    font-size: 10px;
    color: var(--color-gray-600);
}

/* Hero Project Info Bar */
.hero-project-info {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.hero-info-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--color-gray-300);
    font-size: var(--font-size-sm);
}

.hero-info-icon {
    font-size: 1rem;
}

.hero-info-value {
    font-weight: 700;
    color: var(--color-white);
}

.hero-info-label {
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
}

/* Carousel Indicators */
.hero-carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.carousel-dot:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.2);
}

.carousel-dot.active {
    background: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary-glow);
}

.dot-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.8);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    margin-bottom: 8px;
}

.carousel-dot:hover .dot-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Hero Demo CTA */
.hero-demo-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--color-white);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--border-radius);
    transition: all var(--transition-base);
}

.hero-demo-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.hero-demo-cta-arrow {
    transition: transform var(--transition-base);
}

.hero-demo-cta:hover .hero-demo-cta-arrow {
    transform: translateY(3px);
}

/* Video Modal */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.video-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
}

.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    z-index: 1;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.video-modal.active .video-modal-content {
    transform: scale(1);
}

.video-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    transition: transform var(--transition-base);
}

.video-modal-player {
    background: var(--color-dark);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.video-modal-player video {
    width: 100%;
    display: block;
}

/* ========================================
   Download Complete Modal
   ======================================== */

.download-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.download-modal.active {
    opacity: 1;
    visibility: visible;
}

.download-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.download-modal-content {
    position: relative;
    width: 90%;
    max-width: 420px;
    background: var(--color-white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    z-index: 1;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-xl);
}

.download-modal.active .download-modal-content {
    transform: scale(1) translateY(0);
}

.download-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--color-gray-100);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 14px;
    cursor: pointer;
    color: var(--color-gray-500);
    transition: all var(--transition-base);
}

.download-modal-close:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.download-modal-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.download-modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
}

/* Feedback Section */
.download-feedback {
    margin-bottom: var(--spacing-lg);
}

.download-feedback-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.download-feedback-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.feedback-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-full);
    background: var(--color-white);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
}

.feedback-btn:hover {
    border-color: var(--color-gray-300);
    background: var(--color-gray-50);
}

.feedback-btn.selected {
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.08);
    color: var(--color-primary);
}

.feedback-btn-positive.selected {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.08);
    color: var(--color-success);
}

.feedback-btn-negative.selected {
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.08);
    color: #d97706;
}

.feedback-emoji {
    font-size: 1.2em;
}

.download-feedback-thanks {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-success);
    font-weight: 500;
}

/* Divider */
.download-modal-divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--spacing-lg) 0;
}

/* Subscribe Section */
.download-subscribe {
    margin-bottom: var(--spacing-lg);
}

.download-subscribe-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.download-subscribe-form {
    display: flex;
    gap: var(--spacing-sm);
    align-items: stretch;
}

.download-subscribe-input {
    flex: 1;
    min-width: 0; /* 防止 flex 子元素溢出 */
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-base);
}

.download-subscribe-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.download-subscribe-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-base);
    flex-shrink: 0; /* 防止按钮被压缩 */
    min-width: 100px; /* 确保最小宽度 */
}

.download-subscribe-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-subscribe-success {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-success);
    font-weight: 500;
}

/* Skip Button */
.download-modal-skip {
    background: none;
    border: none;
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: color var(--transition-base);
}

.download-modal-skip:hover {
    color: var(--color-gray-600);
}

@media (max-width: 768px) {
    .download-modal-content {
        width: 92%;
        max-width: 380px;
    }
    
    .download-subscribe-form {
        gap: var(--spacing-sm);
    }
    
    .download-subscribe-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .download-modal-content {
        width: 95%;
        max-width: 350px;
        padding: var(--spacing-xl);
    }
    
    .download-modal-title {
        font-size: var(--font-size-lg);
    }
    
    .download-subscribe-form {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .download-subscribe-btn {
        padding: var(--spacing-md);
        font-size: var(--font-size-sm);
        min-width: auto;
    }
    
    .download-feedback-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .feedback-btn {
        justify-content: center;
        padding: var(--spacing-md);
    }
}

/* Fade In Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Responsive */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-cta-group {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-privacy {
        justify-content: center;
    }
    
    .hero-demo-card {
        max-width: 400px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    .hero-features {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta-group {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta {
        width: 100%;
    }
    
    .hero-demo-card {
        padding: var(--spacing-md);
    }
    
    .hero-project-info {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        justify-content: center;
    }
    
    .hero-info-item {
        flex: 0 0 45%;
        justify-content: center;
    }
}


/* ========================================
   Tool Section - Simplified Layout (Final Design)
   ======================================== */

.tool-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
    position: relative;
    min-height: calc(100vh - var(--header-height));
}

.tool-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-gray-300), transparent);
}

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

/* Tool States */
.tool-state {
    width: 100%;
}

/* State 1: Upload Hero */
.upload-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    padding: var(--spacing-2xl);
}

.upload-zone-large {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-4xl) var(--spacing-2xl);
    border: 3px dashed var(--color-primary-light);
    border-radius: var(--border-radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.03) 0%, rgba(139, 92, 246, 0.03) 100%);
}

.upload-zone-large:hover,
.upload-zone-large.dragover {
    border-color: var(--color-primary);
    border-style: solid;
    transform: scale(1.02);
    box-shadow: 0 16px 48px rgba(59, 130, 246, 0.2);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
}

.upload-icon-large {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
    transition: all var(--transition-base);
}

.upload-zone-large:hover .upload-icon-large {
    transform: scale(1.1) translateY(-8px);
}

.upload-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.upload-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.upload-formats {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
}

/* State 2: Result */
.tool-state-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.tool-state-result[hidden] {
    display: none !important;
}

/* Result Header */
.result-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border-radius: var(--border-radius-full);
    animation: fadeInDown 0.5s ease;
}

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

.result-icon {
    font-size: 1.5rem;
}

.result-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-dark);
    margin: 0;
}

/* Collapsible Toolbar */
.tool-toolbar {
    width: 100%;
    max-width: 900px;
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    animation: slideDown 0.3s ease;
    position: relative;
}

.tool-toolbar[hidden] {
    display: none !important;
}

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

.toolbar-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}

.toolbar-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    transition: all var(--transition-base);
}

.toolbar-close:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

/* Toolbar Controls */
.toolbar-control {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toolbar-control-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toolbar-control-icon {
    font-size: 1.2rem;
}

.toolbar-control-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    flex: 1;
}

.toolbar-control-value {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.1);
    padding: 2px 8px;
    border-radius: var(--border-radius-sm);
}

/* Compact Preset Buttons */
.preset-buttons-compact {
    display: flex;
    gap: var(--spacing-xs);
}

.preset-btn-sm {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-600);
    transition: all var(--transition-base);
}

.preset-btn-sm:hover {
    background: var(--color-gray-200);
}

.preset-btn-sm.active {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Compact Slider */
.slider-sm {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--color-gray-200);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.slider-sm::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-white);
    border: 2px solid var(--color-primary);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

/* Color Buttons */
.color-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.color-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
}

.color-btn input {
    display: none;
}

.color-swatch {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--color-gray-300);
    transition: all var(--transition-base);
}

.color-btn:hover .color-swatch {
    transform: scale(1.1);
}

.color-btn.active .color-swatch,
.color-btn:has(input:checked) .color-swatch {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.color-swatch.black-white {
    background: linear-gradient(135deg, #1e293b 50%, #ffffff 50%);
}

.color-swatch.white-black {
    background: linear-gradient(135deg, #ffffff 50%, #1e293b 50%);
}

.color-swatch.red-white {
    background: linear-gradient(135deg, #dc2626 50%, #ffffff 50%);
}

.color-swatch.blue-white {
    background: linear-gradient(135deg, #2563eb 50%, #ffffff 50%);
}

/* Preview Main */
.preview-main {
    width: 100%;
    max-width: 800px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
}

.preview-main canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Info Bar */
.info-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    width: 100%;
    max-width: 800px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
}

.info-thumbnail {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.info-thumbnail:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.thumbnail-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail-label {
    position: absolute;
    bottom: 2px;
    right: 2px;
    font-size: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 2px 4px;
    border-radius: 4px;
}

.info-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    flex: 1;
}

.info-stat {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    white-space: nowrap;
}

.info-stat strong {
    color: var(--color-dark);
}

/* Action Bar */
.action-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* Upload New Button */
.upload-new {
    margin-top: var(--spacing-sm);
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: color var(--transition-base);
}

.btn-text:hover {
    color: var(--color-primary);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.btn-icon {
    font-size: 1.1em;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md), 0 0 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

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

.btn-outline {
    background: transparent;
    color: var(--color-gray-600);
    border-color: var(--color-gray-300);
}

.btn-outline:hover {
    background: var(--color-gray-100);
}

/* Mobile Bottom Actions */
.tool-actions-mobile {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-white);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    border-top: 1px solid var(--color-gray-200);
    z-index: 100;
}

.tool-actions-mobile[hidden] {
    display: none !important;
}

.btn-mobile {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
}

.btn-mobile-primary {
    flex: 1;
    background: var(--gradient-primary);
    color: var(--color-white);
}

.btn-mobile-icon {
    width: 44px;
    height: 44px;
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.btn-mobile-icon:hover {
    background: var(--color-gray-200);
}

/* Mobile Settings Panel */
.mobile-settings-panel {
    position: fixed;
    bottom: 60px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.15);
    z-index: 99;
    max-height: 60vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.mobile-settings-panel[hidden] {
    display: none !important;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.mobile-settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    background: var(--color-white);
}

.mobile-settings-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-dark);
}

.mobile-settings-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.mobile-settings-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.mobile-control {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mobile-control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
}

.mobile-control-value {
    color: var(--color-primary);
    font-weight: 700;
}

.preset-buttons-mobile {
    display: flex;
    gap: var(--spacing-sm);
}

.preset-btn-mobile {
    flex: 1;
    padding: var(--spacing-sm);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-600);
    cursor: pointer;
}

.preset-btn-mobile.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.slider-mobile {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--color-gray-200);
    -webkit-appearance: none;
    appearance: none;
}

.slider-mobile::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-md);
}

.color-buttons-mobile {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.color-btn-mobile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.color-btn-mobile.active,
.color-btn-mobile:has(input:checked) {
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.1);
}

.color-btn-mobile input {
    display: none;
}

.color-swatch-mobile {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--color-gray-300);
}

.color-label-mobile {
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
}

/* Image Modal */
.image-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.image-modal[hidden] {
    display: none !important;
}

.image-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
}

.image-modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    z-index: 1;
}

.image-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: background 0.2s ease;
}

.image-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.image-modal-img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--border-radius-lg);
}

/* Step Indicator */
.step-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.step-number {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 700;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.step-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    letter-spacing: -0.01em;
}

/* Left Column: Preview (Sticky) */
.tool-preview-column {
    position: relative;
}

.tool-preview-sticky {
    position: sticky;
    top: calc(var(--header-height) + 20px);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Preview Panels */
.preview-panel {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.preview-panel:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-gray-300);
}

.preview-label {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-left: 3px solid var(--color-primary);
    border-bottom: 1px solid var(--color-gray-200);
}

.preview-label-dot {
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
}

.preview-label-dot-result {
    background: var(--color-primary);
}

/* Result panel has accent color border */
.preview-panel-result .preview-label {
    border-left-color: var(--color-accent);
}

.preview-area {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 240px;
    max-height: 320px;
    position: relative;
    background: 
        linear-gradient(45deg, var(--color-gray-100) 25%, transparent 25%),
        linear-gradient(-45deg, var(--color-gray-100) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--color-gray-100) 75%),
        linear-gradient(-45deg, transparent 75%, var(--color-gray-100) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* Upload Zone - Enhanced with Better Visual Hierarchy */
.upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: calc(100% - 24px);
    height: calc(100% - 24px);
    margin: 12px;
    padding: var(--spacing-xl);
    border: 2px dashed var(--color-primary-light);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.03) 0%, rgba(139, 92, 246, 0.03) 100%);
    position: relative;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.upload-zone::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primary);
    border-style: solid;
    transform: scale(1.02);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.upload-zone:hover::before,
.upload-zone.dragover::before {
    opacity: 0.05;
}

.upload-zone:hover::after,
.upload-zone.dragover::after {
    opacity: 1;
}

.upload-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.upload-zone:hover .upload-icon {
    transform: scale(1.15) translateY(-4px);
    filter: drop-shadow(0 8px 16px rgba(59, 130, 246, 0.2));
}

.upload-text {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-xs);
    position: relative;
    z-index: 1;
}

.upload-subtext {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.upload-formats {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    position: relative;
    z-index: 1;
}

/* Preview Image & Canvas */
.preview-image,
#diceCanvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.preview-placeholder {
    text-align: center;
    color: var(--color-gray-400);
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dice Pattern Background for Empty State */
.placeholder-dice-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, var(--color-gray-300) 2px, transparent 2px),
        radial-gradient(circle at 75% 25%, var(--color-gray-300) 2px, transparent 2px),
        radial-gradient(circle at 50% 50%, var(--color-gray-300) 2px, transparent 2px),
        radial-gradient(circle at 25% 75%, var(--color-gray-300) 2px, transparent 2px),
        radial-gradient(circle at 75% 75%, var(--color-gray-300) 2px, transparent 2px);
    background-size: 40px 40px;
    opacity: 0.3;
    animation: patternFloat 20s ease-in-out infinite;
}

@keyframes patternFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(10px, 10px); }
}

.placeholder-content {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.9);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(4px);
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.6;
    animation: diceBounce 2s ease-in-out infinite;
}

@keyframes diceBounce {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-8px) rotate(5deg); }
}

.placeholder-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xs);
}

.placeholder-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.preview-area-result {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
}

/* Compact Project Info (Below Preview) */
.project-info-compact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-gray-200);
}

.info-item-compact {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-sm);
}

.info-icon-compact {
    font-size: 1rem;
}

.info-value-compact {
    font-weight: 700;
    color: var(--color-dark);
    transition: all var(--transition-base);
}

.info-value-compact.info-placeholder {
    color: var(--color-gray-300);
    font-weight: 500;
}

.info-value-compact.info-active {
    color: var(--color-dark);
    font-weight: 700;
}

.info-label-compact {
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
}

/* Right Column: Controls */
.tool-controls-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.control-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.control-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.control-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.control-label-icon {
    font-size: var(--font-size-lg);
}

.control-value {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

/* Preset Buttons - Pill Style */
.preset-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.preset-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    text-align: center;
    transition: all var(--transition-base);
}

.preset-btn span {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-gray-500);
    margin-top: 2px;
}

.preset-btn:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.preset-btn.active {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.preset-btn.active span {
    color: rgba(255, 255, 255, 0.8);
}

/* Slider - Custom Style */
.slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--color-gray-200);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    position: relative;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: var(--shadow-lg), 0 0 0 4px rgba(59, 130, 246, 0.2);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-primary);
    cursor: pointer;
}

/* Color Options - 2×2 Grid Layout */
.color-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.color-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
}

.color-option:hover {
    background: var(--color-gray-200);
}

.color-option input {
    display: none;
}

.color-option:has(input:checked) {
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.08);
}

.color-preview {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--color-gray-300);
    flex-shrink: 0;
}

.color-preview.black-white {
    background: linear-gradient(135deg, #1e293b 50%, #ffffff 50%);
}

.color-preview.white-black {
    background: linear-gradient(135deg, #ffffff 50%, #1e293b 50%);
}

.color-preview.red-white {
    background: linear-gradient(135deg, #dc2626 50%, #ffffff 50%);
}

.color-preview.blue-white {
    background: linear-gradient(135deg, #2563eb 50%, #ffffff 50%);
}

.color-info {
    flex: 1;
    min-width: 0;
}

.color-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    display: block;
}

.color-desc {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

.color-badge {
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: var(--border-radius-full);
    font-weight: 600;
}

/* Action Buttons Panel */
.tool-actions-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.btn-full {
    width: 100%;
}

/* Tool Tip Card - Enhanced Design */
.tool-tip-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.15);
    margin-top: var(--spacing-sm);
}

.tool-tip-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    line-height: 1;
}

.tool-tip-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tool-tip-title {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-primary);
}

.tool-tip-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.4;
}

/* Legacy tool-tip (keep for compatibility) */
.tool-tip {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-radius: var(--border-radius);
    border: 1px solid rgba(59, 130, 246, 0.1);
}

.tool-tip strong {
    color: var(--color-primary);
}

/* Processing Animation Overlay */
.processing-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    z-index: 10;
    border-radius: var(--border-radius);
    backdrop-filter: blur(4px);
}

.processing-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.processing-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-600);
}

.processing-dice {
    display: flex;
    gap: var(--spacing-xs);
}

.processing-dice span {
    font-size: 1.5rem;
    animation: diceBounce 0.6s ease-in-out infinite;
}

.processing-dice span:nth-child(2) {
    animation-delay: 0.1s;
}

.processing-dice span:nth-child(3) {
    animation-delay: 0.2s;
}


/* ========================================
   Trust Bar - Social Proof
   ======================================== */

.trust-bar {
    background: var(--color-dark);
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.trust-bar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 0% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 100% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}

.trust-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.trust-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: center;
}

.trust-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.trust-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -0.02em;
}

.trust-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    font-weight: 500;
}

@media (max-width: 768px) {
    .trust-items {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}


/* ========================================
   Section Common Styles
   ======================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
    max-width: 600px;
    margin: 0 auto;
}


/* ========================================
   Gallery Section - Masonry Style
   ======================================== */

.gallery-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-gray-100);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.gallery-item {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
}

.gallery-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    z-index: 1;
    transition: opacity var(--transition-base);
}

.gallery-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.gallery-item:hover::before {
    opacity: 0.9;
}

.gallery-image {
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--color-gray-200) 0%, var(--color-gray-300) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Real gallery images */
.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-img {
    transform: scale(1.05);
}

.gallery-placeholder {
    font-size: 4rem;
    opacity: 0.4;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.gallery-item:hover .gallery-placeholder {
    transform: scale(1.2);
    opacity: 0.2;
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay-icon {
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.gallery-overlay-text {
    color: var(--color-white);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.gallery-info {
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
    z-index: 2;
    background: var(--color-white);
}

.gallery-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
}

.gallery-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.gallery-cta {
    text-align: center;
}

@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
    }
}


/* ========================================
   Features Section - Icon Cards
   ======================================== */

.features-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 0 0 3px 3px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon-wrapper {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon-wrapper {
    transform: scale(1.1) rotate(5deg);
    background: var(--gradient-primary);
}

.feature-icon {
    font-size: 2rem;
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    filter: brightness(1.5);
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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


/* ========================================
   FAQ Section - Accordion Style
   ======================================== */

.faq-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

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

.faq-item {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-lg);
}

.faq-item.active {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--color-primary);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-dark);
    text-align: left;
    transition: all var(--transition-base);
}

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

.faq-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: 50%;
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: var(--color-primary);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    line-height: 1.7;
}


/* ========================================
   Final CTA Section
   ======================================== */

.final-cta {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(59, 130, 246, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(139, 92, 246, 0.2) 0%, transparent 50%);
}

.final-cta .container {
    position: relative;
    z-index: 1;
}

.final-cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.final-cta-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-xl);
}

.final-cta .hero-cta {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-xl);
}

.final-cta .hero-cta:hover {
    background: var(--color-gray-100);
    transform: translateY(-3px);
}


/* ========================================
   Footer - Modern Dark
   ======================================== */

.footer {
    background: var(--color-dark);
    color: var(--color-gray-400);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-4xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-lg);
}

.footer-brand .logo-text {
    color: var(--color-white);
    background: none;
    -webkit-text-fill-color: var(--color-white);
}

.footer-tagline {
    font-size: var(--font-size-base);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    color: var(--color-gray-400);
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-heading {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-column a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    text-decoration: none;
    transition: all var(--transition-base);
    padding: var(--spacing-xs) 0;
}

.footer-column a:hover {
    color: var(--color-white);
    padding-left: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.footer-note {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

@media (max-width: 768px) {
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}


/* ========================================
   Utility Classes
   ======================================== */

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}


/* ========================================
   Loading & Animations
   ======================================== */

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.loading {
    background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}


/* ========================================
   Scroll Animations (Optional Enhancement)
   ======================================== */

[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}


/* ========================================
   Tool Section - Simplified Layout Responsive
   ======================================== */

/* Desktop: Hide mobile elements */
@media (min-width: 769px) {
    .tool-actions-mobile {
        display: none !important;
    }
    
    .mobile-settings-panel {
        display: none !important;
    }
}

/* Tablet */
@media (max-width: 1024px) {
    .toolbar-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .toolbar-control:last-child {
        grid-column: span 2;
    }
    
    .preview-main {
        max-width: 600px;
    }
    
    .info-bar {
        max-width: 600px;
        flex-wrap: wrap;
    }
    
    .info-stats {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .tool-section {
        padding: var(--spacing-2xl) 0;
        padding-bottom: 80px; /* Space for fixed bottom bar */
    }
    
    .upload-hero {
        min-height: 400px;
        padding: var(--spacing-lg);
    }
    
    .upload-zone-large {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .upload-icon-large {
        font-size: 3.5rem;
    }
    
    .upload-title {
        font-size: var(--font-size-lg);
    }
    
    /* Result state mobile */
    .tool-state-result {
        gap: var(--spacing-md);
    }
    
    .result-header {
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .result-title {
        font-size: var(--font-size-base);
    }
    
    /* Hide desktop toolbar on mobile */
    .tool-toolbar {
        display: none !important;
    }
    
    /* Preview full width */
    .preview-main {
        max-width: 100%;
        border-radius: var(--border-radius);
    }
    
    /* Info bar compact */
    .info-bar {
        max-width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .info-thumbnail {
        width: 50px;
        height: 50px;
    }
    
    .info-stats {
        gap: var(--spacing-sm);
    }
    
    .info-stat {
        font-size: var(--font-size-xs);
    }
    
    /* Hide desktop action bar on mobile */
    .action-bar {
        display: none;
    }
    
    /* Hide upload new on mobile (use back gesture) */
    .upload-new {
        display: none;
    }
    
    /* Show mobile bottom actions */
    .tool-actions-mobile {
        display: flex !important;
    }
    
    /* Mobile settings panel */
    .mobile-settings-panel {
        display: block;
    }
    
    .mobile-settings-panel[hidden] {
        display: none;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .upload-hero {
        min-height: 350px;
    }
    
    .upload-zone-large {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .upload-icon-large {
        font-size: 3rem;
    }
    
    .upload-title {
        font-size: var(--font-size-base);
    }
    
    .upload-subtitle {
        font-size: var(--font-size-sm);
    }
    
    .info-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .info-thumbnail {
        align-self: center;
    }
    
    .info-stats {
        width: 100%;
        justify-content: center;
    }
    
    .btn-mobile {
        padding: var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .btn-mobile-icon {
        width: 40px;
        height: 40px;
    }
}

/* Image Modal Responsive */
@media (max-width: 768px) {
    .image-modal-content {
        max-width: 95vw;
    }
    
    .image-modal-img {
        max-height: 70vh;
    }
    
    .image-modal-close {
        top: -36px;
        width: 32px;
        height: 32px;
    }
}

/* ========================================
   Sub-Pages Styles
   ======================================== */

/* Page Hero (for sub-pages) */
.page-hero {
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: var(--gradient-hero);
    color: var(--color-white);
}

.page-hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.page-hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    max-width: 600px;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--color-white);
}

.breadcrumb-sep {
    color: var(--color-gray-600);
}

.breadcrumb-current {
    color: var(--color-gray-300);
}

/* Container Narrow */
.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ========================================
   Templates Page
   ======================================== */

.templates-section {
    padding: var(--spacing-4xl) 0;
}

.template-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-full);
    background: var(--color-white);
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.template-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

.template-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.template-image {
    position: relative;
    height: 200px;
    background: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
}

.template-placeholder {
    font-size: 4rem;
    opacity: 0.5;
}

.template-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--border-radius-sm);
}

.template-content {
    padding: var(--spacing-lg);
}

.template-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-900);
}

.template-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.template-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

.template-cta {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.template-cta:hover {
    color: var(--color-primary-dark);
}

/* Templates Custom CTA */
.templates-custom-cta {
    background: var(--gradient-hero);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-3xl);
    text-align: center;
}

.custom-cta-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.custom-cta-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.custom-cta-desc {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-xl);
}

/* Tips Section */
.tips-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-gray-100);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.tip-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    text-align: center;
}

.tip-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.tip-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.tip-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* ========================================
   Gallery Page
   ======================================== */

.gallery-page-section {
    padding: var(--spacing-4xl) 0;
}

.gallery-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
}

.gallery-page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.gallery-page-item {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

.gallery-page-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.gallery-page-image {
    position: relative;
    height: 250px;
    background: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-page-placeholder {
    font-size: 5rem;
    opacity: 0.4;
}

.gallery-page-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gallery-page-item:hover .gallery-page-overlay {
    opacity: 1;
}

.gallery-page-zoom {
    font-size: 2rem;
}

.gallery-page-info {
    padding: var(--spacing-lg);
}

.gallery-page-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.gallery-page-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-sm);
}

.gallery-page-desc {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    font-style: italic;
}

.gallery-page-cta {
    text-align: center;
    padding: var(--spacing-3xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-xl);
}

.gallery-page-cta h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.gallery-page-cta p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   Blog Styles
   ======================================== */

.blog-section {
    padding: var(--spacing-4xl) 0;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.blog-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-card-featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
}

.blog-card-image {
    position: relative;
    min-height: 200px;
    background: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-placeholder {
    font-size: 4rem;
    opacity: 0.4;
}

.blog-card-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--border-radius-sm);
}

.blog-card-content {
    padding: var(--spacing-xl);
}

.blog-card-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

.blog-card-category {
    color: var(--color-primary);
    font-weight: 600;
}

.blog-card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.blog-card-title a {
    color: var(--color-gray-900);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.blog-card-title a:hover {
    color: var(--color-primary);
}

.blog-card-excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.blog-card-link {
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
}

.blog-card-link:hover {
    text-decoration: underline;
}

/* Blog Newsletter */
.blog-newsletter {
    background: var(--gradient-hero);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-3xl);
    text-align: center;
}

.blog-newsletter-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.blog-newsletter-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.blog-newsletter-desc {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-xl);
}

.blog-newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 400px;
    margin: 0 auto;
}

.blog-newsletter-input {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

.blog-newsletter-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.blog-newsletter-btn:hover {
    background: var(--color-primary-dark);
}

/* ========================================
   Article Styles
   ======================================== */

.article-header {
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: var(--gradient-hero);
    color: var(--color-white);
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.article-category {
    color: var(--color-primary-light);
    font-weight: 600;
}

.article-date, .article-read {
    color: var(--color-gray-400);
}

.article-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.article-excerpt {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    max-width: 700px;
}

.article-content {
    padding: var(--spacing-4xl) 0;
}

.article-intro {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
}

/* Article TOC */
.article-toc {
    background: var(--color-gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-2xl);
}

.article-toc h4 {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

.article-toc ol {
    list-style: decimal;
    padding-left: var(--spacing-lg);
}

.article-toc li {
    margin-bottom: var(--spacing-sm);
}

.article-toc a {
    color: var(--color-gray-700);
    text-decoration: none;
}

.article-toc a:hover {
    color: var(--color-primary);
}

/* Article Content Typography */
.article-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-top: var(--spacing-3xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-900);
}

.article-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-800);
}

.article-content p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.article-content ul, .article-content ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.article-content li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

/* Comparison Table */
.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-2xl);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table th {
    background: var(--color-gray-100);
    font-weight: 600;
    color: var(--color-gray-700);
}

.comparison-table .highlight-row {
    background: rgba(59, 130, 246, 0.05);
}

/* Feature List */
.feature-list {
    margin-bottom: var(--spacing-2xl);
}

.feature-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-item h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-item p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* Review Card */
.review-card {
    background: var(--color-gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xl);
}

.review-rating {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.review-card h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.review-card ul {
    margin-bottom: 0;
}

/* Callout Boxes */
.callout {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-2xl);
}

.callout h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.callout p {
    margin-bottom: var(--spacing-md);
}

.callout p:last-child {
    margin-bottom: 0;
}

.callout-info {
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--color-primary);
}

.callout-success {
    background: rgba(16, 185, 129, 0.1);
    border-left: 4px solid var(--color-success);
}

.callout-warning {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid #f59e0b;
}

.callout-cta {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

/* Article CTA */
.article-cta {
    text-align: center;
    padding: var(--spacing-3xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-xl);
    margin-top: var(--spacing-3xl);
}

.article-cta h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.article-cta p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

/* Related Articles */
.related-articles {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-100);
}

.related-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.related-grid {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.related-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-gray-700);
    transition: all var(--transition-fast);
}

.related-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.related-icon {
    font-size: 1.5rem;
}

.related-text {
    font-weight: 500;
}

/* ========================================
   About Page
   ======================================== */

.about-section {
    padding: var(--spacing-4xl) 0;
}

.about-intro {
    margin-bottom: var(--spacing-3xl);
}

.about-lead {
    font-size: var(--font-size-xl);
    color: var(--color-gray-700);
    line-height: 1.7;
}

.about-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-top: var(--spacing-3xl);
    margin-bottom: var(--spacing-lg);
}

.about-section p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.value-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
}

.value-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.value-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.value-card p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin: 0;
}

.about-cta {
    text-align: center;
    padding: var(--spacing-3xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-xl);
    margin-top: var(--spacing-3xl);
}

.about-cta h3 {
    margin-bottom: var(--spacing-sm);
}

.about-cta p {
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   Legal Pages (Privacy, Terms)
   ======================================== */

.legal-section {
    padding: var(--spacing-4xl) 0;
}

.legal-highlight {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-3xl);
}

.legal-highlight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.legal-highlight h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.legal-highlight p {
    margin: 0;
    color: var(--color-gray-700);
}

.legal-section h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.legal-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

.legal-section p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.legal-section ul {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.legal-section li {
    margin-bottom: var(--spacing-sm);
}

.legal-footer {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

/* ========================================
   How-To Article Specific Styles
   ======================================== */

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.overview-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
}

.overview-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.overview-item h4 {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xs);
}

.overview-item p {
    font-weight: 600;
    margin: 0;
}

/* Step Instructions */
.step-instructions {
    margin-bottom: var(--spacing-2xl);
}

.instruction {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.instruction:last-child {
    border-bottom: none;
}

.instruction-num {
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.instruction h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.instruction p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* Checklist */
.checklist {
    margin-bottom: var(--spacing-2xl);
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
}

.checklist-item input {
    margin-top: 4px;
}

/* Size Guide Cards */
.size-guide {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.size-card {
    padding: var(--spacing-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    text-align: center;
}

.size-card-featured {
    background: rgba(59, 130, 246, 0.1);
    border: 2px solid var(--color-primary);
}

.size-icon {
    display: inline-block;
    width: 48px;
    height: 48px;
    background: var(--color-gray-300);
    border-radius: 50%;
    line-height: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.size-card-featured .size-icon {
    background: var(--color-primary);
    color: var(--color-white);
}

.size-card h4 {
    margin-bottom: var(--spacing-md);
}

.size-card ul {
    list-style: none;
    padding: 0;
    text-align: left;
    font-size: var(--font-size-sm);
}

.size-best {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* Color Options */
.color-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.color-option {
    padding: var(--spacing-lg);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    text-align: center;
}

.color-preview {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    margin: 0 auto var(--spacing-md);
}

.black-white-preview { background: #1a1a1a; }
.white-black-preview { background: #f5f5f5; border: 1px solid #ddd; }
.red-white-preview { background: #dc2626; }

.color-option h4 {
    margin-bottom: var(--spacing-sm);
}

.color-option p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin: 0;
}

.color-tag {
    display: inline-block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    border-radius: var(--border-radius-sm);
}

/* Vendor Cards */
.vendor-list {
    margin-bottom: var(--spacing-2xl);
}

.vendor-card {
    padding: var(--spacing-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.vendor-card h4 {
    margin-bottom: var(--spacing-md);
}

.vendor-card p {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* Supplies Grid */
.supplies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.supply-item {
    padding: var(--spacing-lg);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    text-align: center;
}

.supply-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.supply-item h4 {
    margin-bottom: var(--spacing-sm);
}

.supply-item p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.supply-cost {
    font-weight: 600;
    color: var(--color-primary);
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.option-card {
    padding: var(--spacing-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
}

.option-card h4 {
    margin-bottom: var(--spacing-sm);
}

.option-card p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.option-cost {
    font-weight: 600;
    color: var(--color-primary);
}

/* Tips List */
.tips-list {
    margin-bottom: var(--spacing-2xl);
}

.tips-list .tip {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.tip-num {
    width: 28px;
    height: 28px;
    background: var(--color-gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

/* ========================================
   Sub-Pages Responsive
   ======================================== */

@media (max-width: 768px) {
    .page-hero {
        padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }
    
    .page-hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .article-header {
        padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }
    
    .article-title {
        font-size: var(--font-size-2xl);
    }
    
    .article-meta {
        flex-wrap: wrap;
    }
    
    .blog-card-featured {
        grid-template-columns: 1fr;
    }
    
    .blog-newsletter-form {
        flex-direction: column;
    }
    
    .legal-highlight {
        flex-direction: column;
        text-align: center;
    }
    
    .container-narrow {
        padding: 0 var(--spacing-md);
    }
    
    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .instruction {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .comparison-table {
        font-size: var(--font-size-xs);
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .page-hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .breadcrumb {
        font-size: var(--font-size-xs);
    }
    
    .filter-btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
    
    .overview-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }
    
    .overview-item {
        padding: var(--spacing-md);
    }
}
/* Gallery Page Image Styles */
.gallery-page-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.gallery-page-item:hover .gallery-page-img {
    transform: scale(1.05);
}
/* ========================================
   Tool Section UX Improvements
   ======================================== */

/* Info Bar Reupload Button */
.info-reupload-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--color-gray-100);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    min-width: 60px;
}

.info-reupload-btn:hover {
    background: var(--color-gray-200);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.reupload-icon {
    font-size: 1.2rem;
}

.reupload-text {
    font-weight: 500;
    white-space: nowrap;
}

/* Inline Customize Panel */
.inline-customize-panel {
    margin-top: var(--spacing-lg);
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 400px;
    }
}

.inline-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
}

.inline-panel-title {
    font-weight: 600;
    color: var(--color-gray-800);
}

.inline-panel-close {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.inline-panel-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.inline-panel-content {
    padding: var(--spacing-lg);
}
/* Inline Control Styles */
.inline-control {
    margin-bottom: var(--spacing-xl);
}

.inline-control:last-child {
    margin-bottom: 0;
}

.inline-control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.inline-control-label {
    font-weight: 500;
    color: var(--color-gray-700);
}

.inline-control-value {
    font-weight: 600;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
}

/* Preset Buttons Inline */
.preset-buttons-inline {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.preset-btn-inline {
    width: 40px;
    height: 32px;
    border: 2px solid var(--color-gray-300);
    background: var(--color-white);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-btn-inline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.preset-btn-inline.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* Slider Inline */
.slider-inline {
    width: 100%;
    height: 6px;
    background: var(--color-gray-200);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.slider-inline::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.slider-inline::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Color Buttons Inline */
.color-buttons-inline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.color-btn-inline {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-sm);
    background: var(--color-white);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-btn-inline:hover {
    border-color: var(--color-gray-300);
    background: var(--color-gray-50);
}

.color-btn-inline.active {
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.05);
}

.color-btn-inline input {
    display: none;
}

.color-swatch-inline {
    width: 20px;
    height: 20px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-gray-300);
}

.color-swatch-inline.black-white { background: #1a1a1a; }
.color-swatch-inline.white-black { background: #f5f5f5; }
.color-swatch-inline.red-white { background: #dc2626; }
.color-swatch-inline.blue-white { background: #2563eb; }

.color-label-inline {
    font-size: var(--font-size-sm);
    font-weight: 500;
}
/* Mobile Responsive for Inline Panel */
@media (max-width: 768px) {
    .inline-customize-panel {
        margin-top: var(--spacing-md);
    }
    
    .inline-panel-content {
        padding: var(--spacing-md);
    }
    
    .color-buttons-inline {
        grid-template-columns: 1fr;
    }
    
    .preset-buttons-inline {
        justify-content: center;
    }
    
    .info-reupload-btn {
        min-width: 50px;
        padding: var(--spacing-xs);
    }
    
    .reupload-text {
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .info-bar {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .info-thumbnail {
        order: 1;
    }
    
    .info-reupload-btn {
        order: 2;
        flex-shrink: 0;
    }
    
    .info-stats {
        order: 3;
        width: 100%;
        justify-content: center;
    }
    
    .inline-control-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
}
/* ========================================
   Side Control Panel (右侧固定面板)
   ======================================== */

.side-control-panel[hidden] {
    display: none !important;
}

.preview-layout {
    display: flex;
    gap: var(--spacing-lg);
    min-height: 400px;
}

.preview-main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.preview-main.with-panel {
    flex: 1;
}

.side-control-panel {
    width: 280px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    max-height: 600px;
    animation: slideInRight 0.3s ease-out;
}

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

.side-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.side-panel-title {
    font-weight: 600;
    color: var(--color-gray-800);
    font-size: var(--font-size-sm);
}

.side-panel-close {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.side-panel-close:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-600);
}

.side-panel-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

/* Side Control Styles */
.side-control {
    margin-bottom: var(--spacing-xl);
}

.side-control:last-child {
    margin-bottom: 0;
}

.side-control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.side-control-label {
    font-weight: 500;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
}

.side-control-value {
    font-weight: 600;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
}

/* Preset Buttons Side */
.preset-buttons-side {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.preset-btn-side {
    height: 32px;
    border: 2px solid var(--color-gray-300);
    background: var(--color-white);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-btn-side:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.preset-btn-side.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* Slider Side */
.slider-side {
    width: 100%;
    height: 6px;
    background: var(--color-gray-200);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.slider-side::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.slider-side::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Color Buttons Side */
.color-buttons-side {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.color-btn-side {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-sm);
    background: var(--color-white);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-btn-side:hover {
    border-color: var(--color-gray-300);
    background: var(--color-gray-50);
}

.color-btn-side.active {
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.05);
}

.color-btn-side input {
    display: none;
}

.color-swatch-side {
    width: 16px;
    height: 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-gray-300);
    flex-shrink: 0;
}

.color-swatch-side.black-white { background: #1a1a1a; }
.color-swatch-side.white-black { background: #f5f5f5; }
.color-swatch-side.red-white { background: #dc2626; }
.color-swatch-side.blue-white { background: #2563eb; }

.color-label-side {
    font-size: var(--font-size-xs);
    font-weight: 500;
}
/* Side Panel Responsive */
@media (max-width: 1024px) {
    .side-control-panel {
        width: 240px;
    }
    
    .side-panel-content {
        padding: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .preview-layout {
        flex-direction: column;
    }
    
    .side-control-panel {
        width: 100%;
        max-height: none;
        order: -1; /* 移动端时显示在预览图上方 */
    }
    
    .preview-main {
        min-height: 300px;
    }
    
    .color-buttons-side {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .preset-buttons-side {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .side-control {
        margin-bottom: var(--spacing-lg);
    }
}