:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --card-bg: #f3f4f6;
  --border: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111827;
    --fg: #f9fafb;
    --muted: #9ca3af;
    --accent: #60a5fa;
    --card-bg: #1f2937;
    --border: #374151;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
}

header h1 {
  font-size: 2rem;
  margin: 0 0 0.25rem;
}

header p.tagline {
  color: var(--muted);
  margin: 0 0 2rem;
  font-size: 1.1rem;
}

section {
  margin-bottom: 2.5rem;
}

section h2 {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 1rem;
}

.project-card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: var(--fg);
  margin-bottom: 0.75rem;
}

.project-card h3 {
  margin: 0 0 0.25rem;
  color: var(--accent);
}

.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

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

.links a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 1rem;
}

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

footer {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 3rem;
}