/* docs/assets/landing.css */
/* Unified CSS variables - same as style.css */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Background & Surface - same as docs */
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f4f4f5;
    --bg-glass: rgba(255, 255, 255, 0.8);

    /* Text */
    --text-primary: #18181b;
    --text-secondary: #3f3f46;
    --text-muted: #71717a;
    --text-inverted: #fafafa;

    /* Borders */
    --border-subtle: rgba(0, 0, 0, 0.06);
    --border-default: #e4e4e7;

    /* Accents */
    --accent-primary: #6366f1;
    --accent-primary-hover: #4f46e5;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

html.dark {
    --bg-primary: #09090b;
    --bg-secondary: #0f0f11;
    --bg-tertiary: #18181b;
    --bg-glass: rgba(15, 15, 17, 0.85);

    --text-primary: #fafafa;
    --text-secondary: #d4d4d8;
    --text-muted: #a1a1aa;
    --text-inverted: #18181b;

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: #27272a;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.2);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand span {
    -webkit-text-fill-color: initial;
}

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

.navbar-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.navbar-actions {
    display: flex;
    align-items: center;
}

/* Hero */
.hero {
    background: var(--bg-secondary);
    padding: 6rem 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-subtle);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    margin: 0 0.5rem;
    transition: all var(--transition-fast);
}

.btn:hover {
    transform: translateY(-2px);
}

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

.btn-primary:hover {
    box-shadow: 0 0 50px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

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

/* Features */
.features-section {
    padding: 5rem 2rem;
}

.features-section h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    padding: 2rem;
    border-radius: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-details {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Main Content */
.landing-main {
    width: 100%;
}

.landing-main > *:not(.hero):not(.features-section) {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

/* Footer */
.landing-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-subtle);
    margin-top: 4rem;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
}

.landing-footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
}

.landing-footer a:hover {
    text-decoration: underline;
}

/* Theme Toggle */
#theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

#theme-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--border-default);
}

html:not(.dark) .sun-icon { display: none; }
html:not(.dark) .moon-icon { display: block; }
html.dark .sun-icon { display: block; }
html.dark .moon-icon { display: none; }

/* Selection */
::selection {
    background: var(--accent-primary);
    color: var(--text-inverted);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }
    
    .navbar-links {
        display: none;
    }
    
    .hero {
        padding: 4rem 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        display: block;
        margin: 0.5rem 0;
    }
}