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

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Grays */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Dark theme */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-accent: #6366f1;
    
    /* Cyber theme colors */
    --cyber-neon: #00ffff;
    --cyber-pink: #ff0080;
    --cyber-purple: #8b5cf6;
    --cyber-green: #00ff41;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    min-height: 100vh;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.gradient-text {
    background: linear-gradient(135deg, var(--cyber-neon), var(--cyber-pink), var(--cyber-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn: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 var(--transition-slow);
}

.btn:hover:before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 35, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 15, 35, 0.95);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link:after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover:after {
    width: 100%;
}

.nav-cta {
    background: linear-gradient(135deg, var(--secondary-color), #d97706);
    color: white;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(99, 102, 241, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, var(--cyber-neon), transparent),
        radial-gradient(2px 2px at 40px 70px, var(--cyber-pink), transparent),
        radial-gradient(1px 1px at 90px 40px, var(--cyber-purple), transparent);
    background-repeat: repeat;
    background-size: 200px 200px, 300px 300px, 150px 150px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 50px;
    color: var(--primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.hero-title {
    margin-bottom: var(--space-lg);
    font-size: 3.5rem;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: var(--space-2xl);
    color: var(--text-secondary);
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-light);
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.hero-actions {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.hero-showcase {
    position: relative;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.showcase-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    transform: perspective(1000px) rotateY(-15deg) rotateX(10deg);
}

.showcase-item {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.showcase-item:hover {
    transform: translateY(-10px);
}

.showcase-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.showcase-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.showcase-item:hover .showcase-glow {
    opacity: 1;
}

/* Featured Extension */
.featured-extension {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.featured-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.featured-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 50px;
    color: var(--secondary-color);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.featured-content h2 {
    margin-bottom: var(--space-lg);
    font-size: 2.5rem;
}

.featured-content p {
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.featured-features {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
}

.feature-item i {
    color: var(--primary-light);
}

.featured-visual {
    position: relative;
}

.cybernight-demo {
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.demo-screen {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #0f0f23, #1a1a2e);
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.demo-effects {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.matrix-rain {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 10px,
        rgba(0, 255, 65, 0.1) 11px,
        rgba(0, 255, 65, 0.1) 12px
    );
    animation: matrix-fall 3s linear infinite;
}

@keyframes matrix-fall {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.neon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.2), transparent 70%);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.7; }
}

.scanlines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(255, 255, 255, 0.03) 2px,
        rgba(255, 255, 255, 0.03) 4px
    );
}

/* Extensions Section */
.extensions {
    padding: var(--space-3xl) 0;
}

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

.section-title {
    margin-bottom: var(--space-lg);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.extensions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.extension-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.extension-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(99, 102, 241, 0.3);
}

.extension-card.featured {
    border-color: rgba(245, 158, 11, 0.5);
    background: rgba(245, 158, 11, 0.05);
}

.extension-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

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

.extension-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.card-badges {
    display: flex;
    gap: var(--space-sm);
}

.badge {
    padding: var(--space-xs) var(--space-md);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.new {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge.featured {
    background: rgba(245, 158, 11, 0.1);
    color: var(--secondary-color);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge.popular {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-light);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge.coming-soon {
    background: rgba(161, 161, 170, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(161, 161, 170, 0.3);
}

.card-content {
    margin-bottom: var(--space-xl);
}

.card-content h3 {
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
}

.card-content p {
    margin-bottom: var(--space-lg);
}

.feature-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.feature-tag {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.rating {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.stars {
    display: flex;
    gap: 2px;
}

.stars i {
    color: var(--secondary-color);
    font-size: 0.875rem;
}

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

/* Category Filter */
.category-filter {
    text-align: center;
    margin-top: var(--space-3xl);
}

.category-filter h3 {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

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

/* Features Section */
.features {
    padding: var(--space-3xl) 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.features .feature-item {
    text-align: center;
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.features .feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    font-size: 2rem;
    color: white;
}

.features .feature-item h3 {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

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

/* Support Section */
.support {
    padding: var(--space-3xl) 0;
}

.support-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.support-info h2 {
    margin-bottom: var(--space-lg);
}

.support-info p {
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.support-ways {
    margin-bottom: var(--space-xl);
}

.support-way {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.support-way i {
    font-size: 1.5rem;
    color: var(--primary-light);
    min-width: 24px;
}

.support-way h3 {
    margin-bottom: var(--space-xs);
    font-size: 1.125rem;
}

.support-way p {
    margin: 0;
    font-size: 0.875rem;
}

.support-actions {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.support-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.coffee-animation {
    position: relative;
}

.coffee-cup {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #8B4513, #A0522D);
    border-radius: 0 0 100px 100px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.coffee-steam {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 60px;
    background: linear-gradient(to top, rgba(255, 255, 255, 0.8), transparent);
    border-radius: 50%;
    animation: steam 2s ease-in-out infinite;
}

.coffee-steam:before,
.coffee-steam:after {
    content: '';
    position: absolute;
    width: 6px;
    height: 60px;
    background: linear-gradient(to top, rgba(255, 255, 255, 0.6), transparent);
    border-radius: 50%;
}

.coffee-steam:before {
    left: -10px;
    animation: steam 2s ease-in-out infinite 0.5s;
}

.coffee-steam:after {
    right: -10px;
    animation: steam 2s ease-in-out infinite 1s;
}

@keyframes steam {
    0%, 100% { transform: translateY(0) scaleY(1); opacity: 1; }
    50% { transform: translateY(-10px) scaleY(1.2); opacity: 0.7; }
}

.coffee-heart {
    font-size: 3rem;
    color: white;
    text-shadow: 0 0 20px rgba(245, 158, 11, 0.5);
}

/* Feedback Section */
.feedback {
    padding: var(--space-3xl) 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.feedback-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.feedback-info h2 {
    margin-bottom: var(--space-lg);
}

.feedback-info p {
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    color: var(--text-secondary);
}

.contact-item i {
    color: var(--primary-light);
    min-width: 20px;
}

.feedback-form {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-xl);
}

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

.footer-brand .brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.footer-logo {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
}

.link-group h3 {
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    font-size: 1.125rem;
}

.link-group a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: var(--space-md);
    transition: color var(--transition-fast);
}

.link-group a:hover {
    color: var(--primary-light);
}

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

.footer-social {
    display: flex;
    gap: var(--space-lg);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

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

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transform: translateY(100px);
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-glow);
}

.back-to-top.show {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .extensions-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .showcase-grid {
        transform: none; /* Remove 3D transform on tablets */
    }
}

@media (max-width: 768px) {
    /* Reduce animations for better mobile performance */
    .hero-particles,
    .matrix-rain,
    .hero-grid {
        display: none;
    }
    
    /* Simplify backdrop filters for mobile */
    .navbar,
    .extension-card,
    .feedback-form {
        backdrop-filter: none;
        background: rgba(15, 15, 35, 0.95);
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .nav-container {
        padding: var(--space-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 15, 35, 0.98);
        backdrop-filter: none;
        flex-direction: column;
        padding: var(--space-xl);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-normal);
        z-index: 1001;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1002;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        min-height: 90vh;
        padding-top: 100px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.2;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-actions {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
    
    .hero-showcase {
        order: -1;
        margin-bottom: var(--space-xl);
    }
    
    .showcase-grid {
        transform: none;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
    }
    
    .showcase-item img {
        height: 120px;
    }
    
    .featured-content,
    .support-content,
    .feedback-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .extensions-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .extension-card {
        padding: var(--space-lg);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }
    
    /* Simplify complex animations */
    .extension-card:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .showcase-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .showcase-item img {
        height: 150px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        padding: var(--space-md) var(--space-lg);
    }
    
    .filter-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-btn {
        width: 200px;
    }
}

/* Loading States */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Ensure content is visible by default (JavaScript enhancement) */
.extension-card,
.feature-item,
.support-way {
    opacity: 1;
    transform: translateY(0);
}

/* Only hide if animations are explicitly enabled */
.animations-enabled .extension-card,
.animations-enabled .feature-item,
.animations-enabled .support-way {
    opacity: 0;
    transform: translateY(30px);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Selection */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
}

/* Mobile Performance Optimizations */
@media (max-width: 768px) {
    /* Disable heavy animations and effects on mobile */
    * {
        will-change: auto !important;
    }
    
    /* Reduce complex shadows */
    .btn-primary {
        box-shadow: 0 4px 6px rgba(99, 102, 241, 0.3);
    }
    
    .extension-card {
        box-shadow: var(--shadow-md);
    }
    
    /* Simplify backgrounds */
    body {
        background: var(--bg-primary);
        background-image: none;
    }
    
    /* Optimize touch targets */
    .btn,
    .nav-link,
    .filter-btn {
        min-height: 44px;
        padding: var(--space-md) var(--space-lg);
    }
    
    /* Improve text readability */
    .hero-description,
    .section-description {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    /* Ensure proper spacing */
    .hero {
        padding: 120px 0 var(--space-3xl);
    }
    
    section {
        padding: var(--space-2xl) 0;
    }
}

/* Mobile-specific fixes */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
        line-height: 1.1;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
        margin: var(--space-xl) 0;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        padding: var(--space-md) var(--space-lg);
        justify-content: center;
    }
    
    .filter-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }
    
    .filter-btn {
        width: 200px;
        text-align: center;
    }
    
    /* Improve form usability */
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    /* Better card layout */
    .extension-card {
        margin-bottom: var(--space-md);
    }
    
    .card-footer {
        flex-direction: column;
        gap: var(--space-md);
        align-items: stretch;
    }
    
    .card-footer .btn {
        width: 100%;
    }
}