/* =========================================
   BABA AI - Modern Design System
   ========================================= */

/* --- Google Font Import --- */
@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800;900&display=swap');

/* --- Custom Font --- */
@font-face {
    font-family: 'B Mitra';
    src: url('./fonts/BMitra.ttf') format('truetype');
}

/* --- CSS Variables (Design Tokens) --- */
:root {
    /* Colors */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-card: rgba(255, 255, 255, 0.04);
    --color-bg-card-hover: rgba(255, 255, 255, 0.08);
    --color-glass: rgba(255, 255, 255, 0.06);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    --color-glass-hover: rgba(255, 255, 255, 0.12);

    /* Accent Colors */
    --color-accent-primary: #e63946;
    --color-accent-secondary: #ff6b6b;
    --color-accent-warm: #ff8c42;
    --color-accent-purple: #a855f7;
    --color-accent-gradient: linear-gradient(135deg, #e63946 0%, #ff6b6b 50%, #ff8c42 100%);
    --color-accent-gradient-2: linear-gradient(135deg, #a855f7 0%, #e63946 100%);

    /* Text Colors */
    --color-text-primary: #f0f0f5;
    --color-text-secondary: rgba(240, 240, 245, 0.7);
    --color-text-muted: rgba(240, 240, 245, 0.4);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.2);
    --shadow-glow-strong: 0 0 60px rgba(230, 57, 70, 0.3);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Typography */
    --font-primary: 'Vazirmatn', 'B Mitra', Arial, 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;
    --font-size-6xl: 4.5rem;

    /* Z-index layers */
    --z-navbar: 1000;
    --z-overlay: 900;
    --z-modal: 1100;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    direction: rtl;
    text-align: right;
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul, ol {
    list-style: none;
}

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

.section-padding {
    padding: var(--space-3xl) 0;
}

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

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

/* --- Animated Background --- */
.bg-animated {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-animated::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: var(--radius-full);
    background: radial-gradient(circle, rgba(230, 57, 70, 0.15) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    animation: floatOrb 20s ease-in-out infinite;
}

.bg-animated::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: var(--radius-full);
    background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
    bottom: -150px;
    left: -150px;
    animation: floatOrb 25s ease-in-out infinite reverse;
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navbar);
    padding: var(--space-sm) 0;
    transition: var(--transition-base);
    backdrop-filter: blur(0px);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-glass-border);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-xl);
    font-weight: 800;
}

.navbar-brand .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.navbar-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: var(--space-xs) 0;
}

.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: var(--transition-base);
    border-radius: 1px;
}

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

.navbar-links a:hover::after {
    width: 100%;
}

.navbar-cta {
    padding: 8px 20px !important;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-xl);
    color: white !important;
    font-weight: 600 !important;
    font-size: var(--font-size-sm);
    box-shadow: var(--shadow-glow);
    transition: var(--transition-base);
}

.navbar-cta::after {
    display: none !important;
}

.navbar-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
}

/* Mobile menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 850px;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 6px 16px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    backdrop-filter: blur(10px);
    animation: fadeInDown 0.8s ease-out;
}

.hero-badge .pulse-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: var(--radius-full);
    animation: pulse 2s ease-in-out infinite;
}

.hero h1 {
    font-size: var(--font-size-6xl);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-glow {
    position: absolute;
    width: 800px;
    height: 800px;
    border-radius: var(--radius-full);
    background: radial-gradient(circle, rgba(230, 57, 70, 0.08) 0%, transparent 60%);
    pointer-events: none;
    animation: heroGlow 8s ease-in-out infinite;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 14px 32px;
    border-radius: var(--radius-xl);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-strong);
}

.btn-primary::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: 0.5s;
}

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

.btn-secondary {
    background: var(--color-glass);
    color: var(--color-text-primary);
    border: 1px solid var(--color-glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--color-glass-hover);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 44px;
    font-size: var(--font-size-lg);
    border-radius: var(--radius-xl);
}

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

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 4px 14px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-accent-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

.section-header h2 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Feature Cards --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: var(--color-bg-card-hover);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-lg);
}

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

.feature-card-image {
    width: 100%;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    aspect-ratio: 16/9;
    object-fit: cover;
    transition: var(--transition-slow);
}

.feature-card:hover .feature-card-image {
    transform: scale(1.03);
}

.feature-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    font-size: 1.6rem;
}

.feature-card-icon.icon-red {
    background: rgba(230, 57, 70, 0.15);
}

.feature-card-icon.icon-purple {
    background: rgba(168, 85, 247, 0.15);
}

.feature-card-icon.icon-orange {
    background: rgba(255, 140, 66, 0.15);
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.feature-card p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* --- How It Works --- */
.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    position: relative;
}

.steps-container::before {
    content: '';
    position: absolute;
    top: 45px;
    left: 15%;
    right: 15%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-glass-border), transparent);
}

.step-item {
    text-align: center;
    position: relative;
}

.step-number {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin: 0 auto var(--space-md);
    position: relative;
    z-index: 1;
}

.step-number.step-1 {
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.2), rgba(230, 57, 70, 0.05));
    color: var(--color-accent-primary);
    border: 2px solid rgba(230, 57, 70, 0.3);
}

.step-number.step-2 {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(168, 85, 247, 0.05));
    color: var(--color-accent-purple);
    border: 2px solid rgba(168, 85, 247, 0.3);
}

.step-number.step-3 {
    background: linear-gradient(135deg, rgba(255, 140, 66, 0.2), rgba(255, 140, 66, 0.05));
    color: var(--color-accent-warm);
    border: 2px solid rgba(255, 140, 66, 0.3);
}

.step-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.step-item p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    max-width: 300px;
    margin: 0 auto;
}

/* --- AI Models Section --- */
.models-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.model-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    min-width: 160px;
}

.model-item:hover {
    transform: translateY(-5px) scale(1.05);
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.15);
}

.model-item img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    filter: brightness(0.9);
    transition: var(--transition-base);
}

.model-item:hover img {
    filter: brightness(1.1);
}

.model-item span {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* --- Stats Section --- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    padding: var(--space-2xl);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    line-height: 1.2;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
    display: block;
}

/* --- CTA Section --- */
.cta-section {
    text-align: center;
    padding: var(--space-3xl) 0;
    position: relative;
}

.cta-box {
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    border: 1px solid rgba(230, 57, 70, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl) var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    border-radius: var(--radius-full);
    background: radial-gradient(circle, rgba(230, 57, 70, 0.1) 0%, transparent 60%);
    animation: floatOrb 15s ease-in-out infinite;
}

.cta-box h2 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
}

.cta-box p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.cta-box .btn {
    position: relative;
    z-index: 1;
}

/* --- Footer --- */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-glass-border);
    padding: var(--space-3xl) 0 var(--space-lg);
}

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

.footer-brand h3 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.8;
    max-width: 320px;
}

.footer-col h4 {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.footer-col a {
    display: block;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    padding: 4px 0;
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-accent-secondary);
    transform: translateX(-4px);
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.footer-social a {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-accent-gradient);
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-glass-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* --- Scroll Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* --- Keyframes --- */
@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

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

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

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

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

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

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

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

    .hero h1 {
        font-size: var(--font-size-5xl);
    }

    .section-header h2 {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 2.8rem;
        --font-size-5xl: 2.2rem;
        --font-size-4xl: 1.8rem;
    }

    .navbar-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(20px);
        padding: var(--space-lg);
        border-bottom: 1px solid var(--color-glass-border);
        gap: var(--space-sm);
    }

    .navbar-links.active {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps-container {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .steps-container::before {
        display: none;
    }

    .stats-bar {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .models-grid {
        gap: var(--space-sm);
    }

    .model-item {
        min-width: 120px;
        padding: var(--space-sm) var(--space-md);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand p {
        max-width: 100%;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }

    .hero {
        padding-top: calc(70px + var(--space-xl));
    }

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

    .cta-box {
        padding: var(--space-2xl) var(--space-lg);
    }

    .cta-box h2 {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }

    .hero h1 {
        font-size: var(--font-size-3xl);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-large {
        width: 100%;
        max-width: 300px;
    }

    .model-item {
        min-width: 100px;
    }

    .model-item img {
        width: 48px;
        height: 48px;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* --- Selection --- */
::selection {
    background: rgba(230, 57, 70, 0.3);
    color: white;
}