/* ============================================
   Compiler Project Intro Page Styles
   ============================================ */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);

    --accent-pink: #ff6b9d;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #ff6b9d 0%, #a855f7 50%, #3b82f6 100%);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: rgba(255, 255, 255, 0.08);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'Fira Code', monospace;
}

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

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

a {
    color: inherit;
    text-decoration: none;
}

.app {
    min-height: 100vh;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

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

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

.nav {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

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

.nav-github {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
}

/* Hero */
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    text-align: center;
}

.hero-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.btn-demo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--accent-gradient);
    color: white;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-demo:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.3);
}

.btn-demo.large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

/* Architecture */
.architecture {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

.pipeline {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pipeline-stage {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    text-align: center;
    min-width: 100px;
}

.pipeline-stage.split {
    display: flex;
    gap: 1rem;
    padding: 1rem;
}

.split-path {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    text-align: center;
}

.stage-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.stage-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.stage-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.pipeline-arrow {
    color: var(--accent-purple);
    font-size: 1.5rem;
}

/* Features */
.features {
    padding: 4rem 2rem;
    background: var(--bg-secondary);
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Syntax */
.syntax {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.code-examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.code-header {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.code-block pre {
    padding: 1rem;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
}

/* CTA */
.cta {
    padding: 4rem 2rem;
    text-align: center;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-github {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-github:hover {
    border-color: var(--accent-purple);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

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

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

.footer-links span {
    color: var(--border-color);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .pipeline {
        flex-direction: column;
    }

    .pipeline-arrow {
        transform: rotate(90deg);
    }
}