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

:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #161616;
    --bg-code: #0d1117;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    
    --accent-primary: #ff4444;
    --accent-secondary: #ff6b6b;
    --accent-tertiary: #ff8e8e;
    
    --border-primary: #333333;
    --border-secondary: #2a2a2a;
    
    --gradient-primary: linear-gradient(135deg, #ff4444 0%, #ff8e8e 100%);
    --gradient-secondary: linear-gradient(135deg, #333333 0%, #1a1a1a 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* 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: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-secondary);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo {
    font-size: 1.5rem;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

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

.github-link {
    background: var(--bg-card);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
    transition: all 0.2s ease;
}

.github-link:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white !important;
}

/* Hero Section */
.hero {
    position: relative;
    padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 68, 68, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 142, 142, 0.08) 0%, transparent 50%),
        var(--bg-primary);
    z-index: -1;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

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

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* Code Window */
.hero-code {
    position: relative;
}

.code-window {
    background: var(--bg-code);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

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

.code-dots {
    display: flex;
    gap: 6px;
}

.code-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-primary);
}

.code-dots span:nth-child(1) { background: #ff5f57; }
.code-dots span:nth-child(2) { background: #ffbd2e; }
.code-dots span:nth-child(3) { background: #28ca42; }

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

.code-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
}

.code-line {
    display: flex;
    align-items: center;
    margin-bottom: 4px;
}

.code-prompt {
    color: var(--accent-primary);
    margin-right: var(--space-xs);
}

.code-command {
    color: var(--text-primary);
}

.code-continuation {
    margin-left: var(--space-md);
    color: var(--text-secondary);
}

.code-flag {
    color: #79c0ff;
}

.code-string {
    color: #a5d6ff;
}

.code-response {
    margin-top: var(--space-xs);
    margin-left: 0;
}

.code-success {
    color: #56d364;
}

/* Section Styles */
section {
    padding: var(--space-3xl) 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

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

/* What Is Section */
.what-is {
    background: var(--bg-secondary);
}

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

.what-is-text h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.what-is-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

.architecture-preview {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--border-primary);
}

.arch-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.arch-layer {
    text-align: center;
    width: 100%;
}

.arch-title {
    display: block;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-sm);
}

.arch-nodes, .arch-apis, .arch-engines {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.arch-node, .arch-api, .arch-engine {
    background: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-secondary);
}

.arch-arrow {
    color: var(--accent-primary);
    font-size: 1.5rem;
    font-weight: bold;
}

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

.feature-card {
    background: var(--bg-card);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    transition: all 0.3s ease;
}

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

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

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    background: var(--bg-secondary);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-lg);
}

.example-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    overflow: hidden;
}

.example-card h3 {
    padding: var(--space-lg);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-secondary);
    background: var(--bg-tertiary);
}

.code-example {
    padding: var(--space-lg);
    background: var(--bg-code);
}

.code-example pre {
    margin: 0;
    overflow-x: auto;
}

.code-example code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-secondary);
    display: block;
}

/* Architecture Section */
.architecture-diagram {
    max-width: 800px;
    margin: 0 auto;
}

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

.arch-level {
    background: var(--bg-card);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    text-align: center;
}

.arch-level h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
}

.arch-components {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.component {
    background: var(--bg-tertiary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    border: 1px solid var(--border-primary);
    font-size: 0.875rem;
}

/* Get Started Section */
.get-started {
    background: var(--bg-secondary);
}

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

.install-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    overflow: hidden;
}

.install-card h3 {
    padding: var(--space-lg);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-secondary);
    background: var(--bg-tertiary);
}

/* Open Source Section */
.open-source {
    background: var(--bg-secondary);
}

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

.open-source-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.open-source-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    font-size: 1.125rem;
}

.open-source-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.oss-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.oss-stat strong {
    color: var(--text-primary);
    font-weight: 600;
}

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

.github-card {
    background: var(--bg-card);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-secondary);
    text-align: center;
}

.github-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.github-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.github-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.github-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

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

/* Community Section */
.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.community-card {
    background: var(--bg-card);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    text-align: center;
    transition: all 0.3s ease;
}

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

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

.community-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.community-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-section h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-section a {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--accent-primary);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.footer-brand .logo {
    font-size: 1.5rem;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid var(--border-secondary);
    padding-top: var(--space-lg);
    text-align: center;
    color: var(--text-tertiary);
}

.footer-bottom p {
    margin-bottom: var(--space-xs);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .what-is-content,
    .open-source-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .navbar .container {
        padding: var(--space-sm) var(--space-md);
    }
    
    .nav-links {
        gap: var(--space-md);
    }
    
    .nav-links a {
        font-size: 0.875rem;
    }
    
    .github-link {
        padding: var(--space-xs);
    }
    
    .github-link span {
        display: none;
    }
    
    .hero {
        padding: calc(70px + var(--space-xl)) 0 var(--space-xl);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        gap: var(--space-md);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .features-grid,
    .examples-grid,
    .install-options,
    .community-grid {
        grid-template-columns: 1fr;
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
    }
    
    .example-card {
        min-width: unset;
    }
    
    .code-example pre {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .what-is-text h3 {
        font-size: 1.5rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stat {
        min-width: 80px;
    }
}