/* css/main.css */
:root {
    /* Colors - Light Theme */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #7c3aed;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Neutrals */
    --background: #ffffff;
    --surface: #f8fafc;
    --surface-elevated: #ffffff;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    
    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', 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);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #8b5cf6;
    --accent: #22d3ee;
    
    --background: #0f172a;
    --surface: #1e293b;
    --surface-elevated: #334155;
    --border: #374151;
    --border-strong: #4b5563;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container */
.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;
    margin-bottom: var(--space-md);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--text-inverse);
    border-color: var(--secondary);
}

.btn-secondary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.btn-outline:hover {
    background: var(--surface);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--space-lg) var(--space-xl);
    font-size: 1.125rem;
}

.btn-icon {
    font-size: 1.25em;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.95);
}

.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-logo .logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.logo {
    height: 2rem;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    align-items: center;
}

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

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

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

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

.dropdown-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.dropdown-link:hover {
    background: var(--surface);
    color: var(--text-primary);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--surface);
}

/* Mobile Navigation */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

.mobile-nav {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background);
    border-top: 1px solid var(--border);
    padding: var(--space-lg);
    transform: translateY(-100%);
    transition: transform var(--transition-normal);
    display: none;
}

.mobile-nav.open {
    transform: translateY(0);
}

.mobile-nav-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mobile-nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.mobile-nav-link:hover {
    background: var(--surface);
}

.mobile-nav-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

/* 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-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
}

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

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.title-main {
    display: block;
    font-weight: 300;
}

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

.title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: var(--space-md);
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
    color: var(--text-secondary);
}

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

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

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

/* Code Window */
.code-window {
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.code-dots {
    display: flex;
    gap: var(--space-sm);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.code-title {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.code-content {
    padding: var(--space-lg);
    overflow-x: auto;
}

/* Features Section */
.features {
    padding: var(--space-3xl) 0;
    background: var(--surface);
}

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

.section-title {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-2xl);
}

.feature-card {
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.feature-example {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
}

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

.matrix-types, .matrix-handlers {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.type-tag, .handler-tag {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.type-tag {
    background: var(--primary);
    color: var(--text-inverse);
}

.type-tag.optional {
    background: var(--warning);
}

.type-tag.required {
    background: var(--error);
}

.type-tag.stream {
    background: var(--accent);
}

.handler-tag {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.blocks-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-sm);
}

.block-tag {
    padding: var(--space-sm);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.875rem;
}

/* Quick Start Section */
.quick-start {
    padding: var(--space-3xl) 0;
}

.quick-start-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.step-card {
    text-align: center;
    padding: var(--space-2xl);
}

.step-number {
    width: 3rem;
    height: 3rem;
    background: var(--primary);
    color: var(--text-inverse);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--space-lg);
}

.step-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.step-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.step-code {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    overflow-x: auto;
}

.step-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.step-link:hover {
    color: var(--primary-dark);
}

/* Domain Showcase */
.domain-showcase {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
}

.showcase-title {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.domain-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.domain-tab {
    padding: var(--space-md) var(--space-lg);
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.domain-tab.active {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
}

.domain-content {
    min-height: 300px;
}

.domain-example {
    display: none;
}

.domain-example.active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.example-code {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    overflow-x: auto;
}

.example-explanation h4 {
    margin-bottom: var(--space-lg);
}

.example-explanation ul {
    list-style: none;
}

.example-explanation li {
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--space-lg);
}

.example-explanation li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Community Stats */
.community-stats {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-inverse);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.stat-item .stat-value {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.stat-item .stat-label {
    font-size: 1.125rem;
    opacity: 0.9;
}

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

.community-cta h3 {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.community-cta p {
    font-size: 1.25rem;
    margin-bottom: var(--space-2xl);
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: var(--space-3xl) 0 var(--space-2xl);
}

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

.footer-brand .footer-logo {
    height: 2rem;
    margin-bottom: var(--space-md);
}

.footer-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

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

.social-link {
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.social-link:hover {
    transform: scale(1.1);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
}

.footer-column h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer-legal a {
    color: inherit;
    text-decoration: none;
}

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

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    margin: var(--space-sm) auto 0;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: rotate(45deg) translateY(0);
    }
    40% {
        transform: rotate(45deg) translateY(-10px);
    }
    60% {
        transform: rotate(45deg) translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-nav {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-start-grid {
        grid-template-columns: 1fr;
    }
    
    .domain-example.active {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .hero-actions,
    .footer {
        display: none;
    }
    
    .hero {
        padding-top: 0;
        min-height: auto;
    }
}