:root {
  --bg: #0a0a0b;
  --bg-2: #111113;
  --surface: #18181b;
  --surface-hover: #222225;
  --ink: #fafafa;
  --ink-2: #a1a1aa;
  --muted: #71717a;
  --line: #27272a;
  --brand: #3b82f6;
  --brand-hover: #60a5fa;
  --accent: #22c55e;
  --radius: 8px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  margin: 0 auto;
  max-width: 900px;
  padding: 0 1.5rem;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--brand-hover);
}

/* Header */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-row {
  align-items: center;
  display: flex;
  height: 56px;
  justify-content: space-between;
}

.brand {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  border-radius: var(--radius);
  color: var(--ink-2);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  transition: all 0.15s;
}

.nav-links a:hover {
  background: var(--surface);
  color: var(--ink);
}

.nav-links a.active {
  background: var(--surface);
  color: var(--ink);
}

/* Hero */
.hero {
  border-bottom: 1px solid var(--line);
  padding-block: 4rem 3rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero .lead {
  color: var(--ink-2);
  font-size: 1.125rem;
  line-height: 1.7;
  max-width: 600px;
}

/* Quick Facts */
.quick-facts {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 2rem;
  background: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact {
  background: var(--surface);
  padding: 1.25rem;
}

.fact-label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
}

.fact-value {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 500;
}

/* Page Header */
.page-header {
  border-bottom: 1px solid var(--line);
  padding-block: 3rem 2rem;
}

.page-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--ink-2);
  max-width: 600px;
}

/* Sections */
.section {
  border-bottom: 1px solid var(--line);
  padding-block: 2rem;
}

.section:last-child {
  border-bottom: none;
}

.section h2 {
  color: var(--ink);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.section p {
  color: var(--ink-2);
  max-width: 600px;
}

.section p + p {
  margin-top: 1rem;
}

/* Grid */
.grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 1.5rem;
}

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

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

.grid-item {
  background: var(--surface);
  padding: 1.25rem;
}

.grid-item h3 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.grid-item p {
  color: var(--ink-2);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Data List */
.data-list {
  list-style: none;
}

.data-list li {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 120px 1fr;
  padding: 1rem 0;
}

.data-list li:last-child {
  border-bottom: none;
}

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

.data-value {
  color: var(--ink);
  font-size: 0.875rem;
}

/* Timeline */
.timeline {
  list-style: none;
}

.timeline li {
  border-left: 2px solid var(--line);
  padding: 0 0 2rem 1.5rem;
  position: relative;
}

.timeline li:last-child {
  padding-bottom: 0;
}

.timeline li::before {
  background: var(--brand);
  border-radius: 50%;
  content: "";
  height: 8px;
  left: -5px;
  position: absolute;
  top: 0.5rem;
  width: 8px;
}

.timeline-date {
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline-desc {
  color: var(--ink-2);
  font-size: 0.875rem;
}

/* Resources */
.resources-list {
  list-style: none;
}

.resources-list li {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.resources-list li:last-child {
  border-bottom: none;
}

.resource-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
}

.resource-link::after {
  color: var(--muted);
  content: "→";
  transition: transform 0.15s;
}

.resource-link:hover::after {
  transform: translateX(4px);
}

.resource-desc {
  color: var(--muted);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
}

/* Navigation Cards */
.nav-cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 2rem;
}

.nav-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: block;
  padding: 1.25rem;
  transition: all 0.15s;
}

.nav-card:hover {
  background: var(--surface-hover);
  border-color: var(--brand);
}

.nav-card h3 {
  color: var(--ink);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.nav-card p {
  color: var(--muted);
  font-size: 0.8125rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8125rem;
  padding: 1.5rem 0;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
}

.footer-mail {
  color: var(--muted);
  font-size: 0.8125rem;
}

.footer-mail:hover {
  color: var(--ink-2);
}

/* Tags */
.tag {
  background: var(--surface);
  border-radius: 4px;
  color: var(--ink-2);
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* Status indicator */
.status {
  align-items: center;
  display: inline-flex;
  font-size: 0.8125rem;
  gap: 0.375rem;
}

.status::before {
  background: var(--accent);
  border-radius: 50%;
  content: "";
  height: 6px;
  width: 6px;
}

/* Utilities */
.mono {
  font-family: var(--font-mono);
}

.text-muted {
  color: var(--muted);
}

.mb-2 {
  margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 1.75rem;
  }

  .nav-row {
    flex-direction: column;
    gap: 1rem;
    height: auto;
    padding: 1rem 0;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .nav-links a {
    padding: 0.625rem 0.875rem;
  }

  .hero {
    padding-block: 3rem 2.5rem;
  }

  .hero .lead {
    font-size: 1.0625rem;
  }

  .page-header {
    padding-block: 2.5rem 1.75rem;
  }

  .section {
    padding-block: 2.25rem;
  }

  .section h2 {
    margin-bottom: 1.25rem;
  }

  .quick-facts {
    margin-top: 2.25rem;
  }

  .fact {
    padding: 1.375rem;
  }

  .grid {
    margin-top: 1.75rem;
  }

  .grid-item {
    padding: 1.375rem;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .data-list li {
    grid-template-columns: 1fr;
    gap: 0.375rem;
    padding: 1.125rem 0;
  }

  .nav-cards {
    margin-top: 2.25rem;
    gap: 1.125rem;
  }

  .nav-card {
    padding: 1.375rem;
  }

  .timeline li {
    padding: 0 0 2.25rem 1.5rem;
  }

  .site-footer {
    padding: 2rem 0;
  }

  .footer-row {
    gap: 0.75rem 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1.5rem;
  }

  .quick-facts {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-block: 2.5rem 2rem;
  }

  .page-header {
    padding-block: 2rem 1.5rem;
  }
}