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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #6366f1;
    --danger: #dc2626;
    --warning: #f59e0b;
    --success: #10b981;
    --bg-dark: #0f172a;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    background: var(--bg-dark);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
    font-family: monospace;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: white;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero .highlight {
    color: var(--primary);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto 3rem;
}

.stat {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #94a3b8;
    font-size: 0.9rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--bg-dark);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    margin-top: 2rem;
}

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

.code-example {
    background: #1e293b;
    border-radius: 12px;
    padding: 2rem;
    text-align: left;
    max-width: 700px;
    margin: 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.code-example code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: #e2e8f0;
    line-height: 1.8;
}

.severity-high {
    color: var(--danger);
    font-weight: 700;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: white;
}

.features h2,
.quickstart h2,
.rules h2,
.use-cases h2,
.final-cta h2 {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    border-radius: 12px;
    background: var(--bg-light);
    border: 2px solid var(--border);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Quick Start Section */
.quickstart {
    padding: 6rem 0;
    background: var(--bg-light);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.code-block {
    background: var(--bg-dark);
    color: #e2e8f0;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-family: monospace;
    margin-top: 1rem;
}

.advanced-usage {
    max-width: 800px;
    margin: 3rem auto 0;
    padding-top: 3rem;
    border-top: 2px solid var(--border);
}

.advanced-usage h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    text-align: center;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.usage-example h4 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.usage-example code {
    display: block;
    background: var(--bg-dark);
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 6px;
    font-family: monospace;
    font-size: 0.9rem;
}

/* Rules Section */
.rules {
    padding: 6rem 0;
    background: white;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-top: -2rem;
    margin-bottom: 3rem;
}

.rules-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.rule-card {
    padding: 1.5rem;
    border-radius: 10px;
    background: var(--bg-light);
    border: 2px solid var(--border);
    transition: all 0.3s;
}

.rule-card:hover {
    border-color: var(--primary);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.rule-severity {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.rule-severity.critical {
    background: #fef2f2;
    color: #991b1b;
}

.rule-severity.high {
    background: #fef2f2;
    color: var(--danger);
}

.rule-severity.medium {
    background: #fffbeb;
    color: #b45309;
}

.rule-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.rule-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.rule-tag {
    display: inline-block;
    background: var(--bg-dark);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: monospace;
}

/* Use Cases Section */
.use-cases {
    padding: 6rem 0;
    background: var(--bg-light);
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.use-case {
    text-align: center;
    padding: 2rem;
}

.use-case h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.use-case p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Final CTA Section */
.final-cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
    color: white;
    text-align: center;
}

.final-cta p {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: 2rem;
}

.code-block-large {
    background: #1e293b;
    border-radius: 12px;
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.code-block-large code {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    color: #e2e8f0;
}

/* Footer */
footer {
    background: var(--bg-dark);
    color: #cbd5e1;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: white;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-col a {
    display: block;
    color: #94a3b8;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.5rem;
    }

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

    .rules-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .hero {
        padding: 4rem 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }

    .feature-grid,
    .rules-grid,
    .use-case-grid,
    .steps,
    .usage-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .features,
    .quickstart,
    .rules,
    .use-cases,
    .final-cta {
        padding: 3rem 0;
    }

    .features h2,
    .quickstart h2,
    .rules h2,
    .use-cases h2,
    .final-cta h2 {
        font-size: 2rem;
    }
}