:root {
  --bg: #0d1117;
  --card: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #f0883e;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  max-width: 700px;
  margin-inline: auto;
  padding: 4rem 1.25rem 3rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

/* Hero */
.hero { text-align: center; margin-bottom: 4.5rem; }
.headshot {
  border-radius: 50%;
  border: 2px solid var(--border);
  width: 160px;
  height: 160px;
  object-fit: cover;
}
.hero h1 { font-size: 2rem; margin: 1.25rem 0 0.5rem; letter-spacing: -0.02em; }
.tagline { color: var(--muted); max-width: 34rem; margin: 0 auto 1.25rem; }
.links { display: flex; gap: 1.5rem; justify-content: center; font-family: var(--mono); font-size: 0.9rem; }
.links a { display: inline-flex; align-items: center; gap: 0.4rem; }
.links svg { width: 1em; height: 1em; }

/* Sections */
section { margin-bottom: 4rem; }
h2 {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  margin: 0 0 1.5rem;
}
.section-intro { color: var(--muted); margin: -0.5rem 0 1.5rem; }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}
.card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; }
.card p { margin: 0 0 0.5rem; color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.card-links { display: flex; gap: 1.25rem; font-family: var(--mono); font-size: 0.85rem; }

/* Career timeline */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}
.timeline li:last-child { border-bottom: none; }
.when { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); padding-top: 0.25rem; }
.timeline h3 { margin: 0; font-size: 1.05rem; }
.timeline p { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.95rem; }

/* Footer */
footer { border-top: 1px solid var(--border); padding-top: 2rem; text-align: center; }
.colophon { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin-top: 1rem; }

/* Mobile */
@media (max-width: 480px) {
  body { padding-top: 2.5rem; font-size: 1rem; }
  .hero h1 { font-size: 1.6rem; }
  .timeline li { grid-template-columns: 3rem 1fr; gap: 0.75rem; }
}