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

:root {
    /* Colors */
    --primary: #0066CC;
    --primary-dark: #0052A3;
    --secondary: #00C896;
    --background: #FFFFFF;
    --surface: #F8FAFB;
    --text: #1A1A1A;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --code-bg: #F3F4F6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
}

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

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

/* 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;
    padding: var(--spacing-md) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text);
}

.nav-logo {
    width: 32px;
    height: 32px;
}

.nav-title {
    font-weight: 600;
    font-size: 1.125rem;
}

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

.nav-menu a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-github {
    display: flex;
    align-items: center;
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    text-align: center;
    background: linear-gradient(to bottom, var(--surface), var(--background));
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 2px solid var(--border);
}

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

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
}

.stat {
    text-align: center;
}

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

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

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

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

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    background: var(--background);
    padding: var(--spacing-xl);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--primary);
}

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

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-muted);
}

/* Quick Start Section */
.quickstart {
    padding: var(--spacing-3xl) 0;
}

.quickstart-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
}

.tab-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-button:hover {
    background: var(--code-bg);
}

.tab-button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.tab-content {
    display: none;
    max-width: 800px;
    margin: 0 auto;
}

.tab-content.active {
    display: block;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    overflow-x: auto;
}

code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Use Cases Section */
.usecases {
    padding: var(--spacing-3xl) 0;
    background: var(--surface);
}

.usecase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.usecase-card {
    background: var(--background);
    padding: var(--spacing-xl);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.usecase-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.usecase-card p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Architecture Section */
.architecture {
    padding: var(--spacing-3xl) 0;
}

.arch-diagram {
    margin: var(--spacing-2xl) 0;
}

.arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.arch-box {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    text-align: center;
    min-width: 200px;
}

.arch-box.highlight {
    border-color: var(--primary);
    background: rgba(0, 102, 204, 0.05);
}

.arch-box h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.arch-box p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.arch-arrow {
    font-size: 2rem;
    color: var(--primary);
}

.arch-description {
    text-align: center;
    max-width: 700px;
    margin: var(--spacing-xl) auto 0;
    color: var(--text-muted);
}

/* CTA Section */
.cta {
    padding: var(--spacing-3xl) 0;
    background: var(--surface);
    text-align: center;
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.cta p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
}

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

/* Footer */
.footer {
    background: var(--text);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-stats {
        gap: var(--spacing-xl);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .nav-menu {
        gap: var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .arch-flow {
        flex-direction: column;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
    }
    
    .usecase-grid {
        grid-template-columns: 1fr;
    }
}