/* CSS Reset & Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0f172a;
    --accent: #22d3ee;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --border: #334155;
    --success: #22c55e;
    --warning: #eab308;
    --error: #ef4444;
    --gradient: linear-gradient(135deg, #6366f1 0%, #22d3ee 100%);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 1.125rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.35);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
}

.github-icon {
    flex-shrink: 0;
}

/* Hero Section */
.hero {
    padding: 160px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

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

.hero-description {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

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

/* Terminal */
.terminal {
    background: #0d1117;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: #161b22;
    border-bottom: 1px solid var(--border);
}

.terminal-dots {
    display: flex;
    gap: 8px;
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.terminal-title {
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.8;
}

.terminal-body .prompt {
    color: var(--accent);
}

.terminal-body .info {
    color: var(--primary-light);
}

.terminal-body .success {
    color: var(--success);
}

.terminal-body .cursor {
    border-right: 2px solid var(--accent);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { border-color: var(--accent); }
    51%, 100% { border-color: transparent; }
}

/* Sections Common */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

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

/* Features Section */
.features {
    background: linear-gradient(180deg, var(--bg) 0%, rgba(30, 41, 59, 0.5) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* Architecture Section */
.architecture-diagram {
    max-width: 600px;
    margin: 0 auto;
}

.arch-layer {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.arch-layer:hover {
    border-color: var(--primary);
}

.arch-layer-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.layer-number {
    width: 32px;
    height: 32px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.arch-layer h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.arch-layer-content {
    color: var(--text-muted);
    font-size: 0.9375rem;
    padding-left: 48px;
}

.arch-layer-content code {
    color: var(--accent);
    font-family: var(--font-mono);
}

.arch-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--primary);
    padding: 12px 0;
}

/* Quick Start Section */
.quickstart {
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.5) 0%, var(--bg) 100%);
}

.steps {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.125rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.code-block {
    display: flex;
    align-items: center;
    background: #0d1117;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    overflow: hidden;
}

.code-block code {
    flex: 1;
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent);
}

.copy-btn {
    padding: 16px 20px;
    background: var(--bg-card);
    border: none;
    border-left: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.copy-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text);
}

/* CTA Section */
.cta {
    background: var(--gradient);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    font-weight: 700;
}

.cta-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

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

.cta .btn-primary:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
    background: #0b1120;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-info p {
    color: var(--text-muted);
    margin-top: 12px;
    font-size: 0.9375rem;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border);
    text-align: center;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

@media (max-width: 768px) {
    .navbar .container {
        flex-wrap: wrap;
        gap: 16px;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 16px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
    }

    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .step {
        flex-direction: column;
        gap: 16px;
    }
}