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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border: #334155;
    --gradient-start: #6366f1;
    --gradient-end: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

code, pre {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
        var(--background);
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 500;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.05rem;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.stat {
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Sections */
section {
    padding: 6rem 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

/* Concept Section */
.concept {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.concept-item {
    padding: 2rem;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 1rem;
    transition: all 0.3s ease;
}

.concept-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

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

.concept-item h3 {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.concept-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* DSL Section */
.dsl-section {
    background: var(--background);
}

.code-block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    overflow: hidden;
    margin: 3rem 0;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--surface-light);
    border-bottom: 1px solid var(--border);
}

.code-filename {
    font-family: 'JetBrains Mono', monospace;
    color: var(--primary-light);
    font-weight: 600;
}

.code-score {
    padding: 0.25rem 0.75rem;
    background: var(--success);
    color: white;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
}

pre {
    padding: 2rem;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.7;
}

code {
    color: var(--text-secondary);
}

.dsl-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
}

.feature h4 {
    color: var(--primary-light);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

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

/* Chapters Section */
.chapters {
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.chapter-card {
    padding: 2rem;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    position: relative;
}

.chapter-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.chapter-highlight {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(236, 72, 153, 0.05));
}

.chapter-number {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 1rem;
}

.chapter-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.chapter-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.chapter-words {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

/* Logos Evaluated */
.logos-evaluated {
    background: var(--background);
}

.logos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.logo-score {
    padding: 2rem;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    text-align: center;
    transition: all 0.3s ease;
}

.logo-score:hover {
    transform: translateY(-5px);
}

.logo-score.iconic {
    border-color: var(--success);
}

.logo-score.excellent {
    border-color: var(--primary);
}

.logo-score.average {
    border-color: var(--warning);
}

.logo-score.poor {
    border-color: var(--error);
}

.logo-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.logo-rating {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.logo-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    display: inline-block;
}

.iconic .logo-label {
    background: var(--success);
    color: white;
}

.excellent .logo-label {
    background: var(--primary);
    color: white;
}

.average .logo-label {
    background: var(--warning);
    color: white;
}

.poor .logo-label {
    background: var(--error);
    color: white;
}

/* ROI Section */
.roi {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.roi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.roi-item {
    text-align: center;
    padding: 2rem;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
}

.roi-stat {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.roi-label {
    color: var(--text-secondary);
    line-height: 1.5;
}

/* CTA Section */
.cta-section {
    background: var(--background);
}

.cta-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.audience-item {
    padding: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
}

.audience-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

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

.audience-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Quote Section */
.quote-section {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    padding: 6rem 2rem;
    text-align: center;
}

.main-quote {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    font-style: italic;
    line-height: 1.4;
    margin-bottom: 1.5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.quote-author {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer h3, .footer h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-stats {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer a {
    color: var(--primary-light);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-license {
    margin-top: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-cta {
        flex-direction: column;
    }

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

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

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

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

    pre {
        font-size: 0.75rem;
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
    }
}