/* Synthetic Taxonomy - Main Stylesheet */

:root {
  /* Color palette - academic but modern */
  --color-primary: #1a365d;
  --color-primary-light: #2c5282;
  --color-accent: #c53030;
  --color-accent-light: #e53e3e;
  --color-text: #1a202c;
  --color-text-muted: #4a5568;
  --color-bg: #ffffff;
  --color-bg-alt: #f7fafc;
  --color-border: #e2e8f0;
  --color-code-bg: #edf2f7;

  /* Typography */
  --font-serif: 'Crimson Pro', 'Georgia', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Layout */
  --max-width: 72rem;
  --content-width: 48rem;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

/* Base */
html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin: 0 0 var(--space-md) 0;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

a:hover {
  border-bottom-color: var(--color-primary-light);
}

/* Navigation */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-lg);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  border: none;
}

.nav-logo:hover {
  color: var(--color-primary-light);
  border: none;
}

.nav-logo em {
  font-style: italic;
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* Main content */
main {
  padding-top: 4rem; /* Account for fixed nav */
}

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

.content {
  max-width: var(--content-width);
  margin: 0 auto;
}

/* Hero section */
.hero {
  padding: var(--space-xl) 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero h1 {
  font-size: 3rem;
  margin-top: 0;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.hero .subtitle {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero .tagline {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 36rem;
  margin: 0 auto var(--space-xl);
}

/* Cladogram Feature Section */
.cladogram-feature {
  padding: var(--space-lg) 0 var(--space-xl);
  background: var(--color-bg);
}

.hero-figure {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.hero-figure figcaption {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-md);
  padding: 0 var(--space-lg);
}

/* CTA buttons */
.cta-group {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 4px;
  border: none;
  transition: all 0.2s ease;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--color-primary-light);
  border: none;
}

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

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

/* Sections */
section {
  padding: var(--space-xl) 0;
}

section.alt-bg {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  margin-top: 0;
}

.section-cta {
  text-align: center;
  margin-top: var(--space-xl);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-lg);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.card a.card-link {
  display: block;
  margin-top: var(--space-md);
  font-weight: 500;
}

/* Family badges */
.family-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-alt);
  border-radius: 4px;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

/* Stats */
.stats-row {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  padding: var(--space-lg) 0;
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Blog list */
.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-item {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.blog-item:last-child {
  border-bottom: none;
}

.blog-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.blog-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin: var(--space-sm) 0;
}

.blog-title a {
  color: var(--color-text);
}

.blog-title a:hover {
  color: var(--color-primary);
}

.blog-excerpt {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.blog-tags {
  display: flex;
  gap: var(--space-sm);
}

.tag {
  font-size: 0.75rem;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-alt);
  border-radius: 3px;
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: white;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: white;
  border-color: white;
}

.footer-note {
  width: 100%;
  text-align: center;
  font-size: 0.85rem;
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Taxonomy page specific */
.taxonomy-embed {
  width: 100%;
  margin: var(--space-xl) 0;
}

.taxonomy-embed iframe {
  width: 100%;
  height: 90vh;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.download-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  justify-content: center;
}

/* Quote block */
.quote-block {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-lg);
  margin: var(--space-xl) 0;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-text-muted);
}

.quote-block cite {
  display: block;
  font-size: 0.9rem;
  font-style: normal;
  margin-top: var(--space-md);
  color: var(--color-text-muted);
}

/* Lead paragraph */
.lead {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* Post figure */
.post-figure {
  margin: var(--space-xl) 0;
}

.post-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.post-figure figcaption {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-md);
  text-align: center;
}

/* Post CTA */
.post-cta {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

/* Responsive */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .hero {
    min-height: auto;
    padding: var(--space-lg) 0;
  }

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

  .hero .subtitle {
    font-size: 1.25rem;
  }

  .nav-links {
    gap: var(--space-md);
  }

  .stats-row {
    gap: var(--space-lg);
  }

  .stat-number {
    font-size: 2rem;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .cta-group {
    flex-direction: column;
    align-items: center;
  }

  .post-cta {
    flex-direction: column;
  }
}

/* Print styles */
@media print {
  .site-nav, .site-footer {
    display: none;
  }

  main {
    padding-top: 0;
  }
}