:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5b6270;
  --border: #e6e8eb;
  --accent: #3457d5;
  --card-bg: #f7f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e8eaed;
    --muted: #9aa1ac;
    --border: #262a33;
    --accent: #7c9bff;
    --card-bg: #171a21;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 17px;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

header.wrap {
  padding-top: 32px;
  padding-bottom: 8px;
}

.brand {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.hero {
  padding: 40px 0 8px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  letter-spacing: -0.01em;
}

.tagline {
  color: var(--muted);
  margin: 0 0 16px;
  font-size: 1.05rem;
}

.links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

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

.links span {
  color: var(--border);
  margin: 0 8px;
}

section {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

section:first-of-type,
.hero {
  border-top: none;
}

h2 {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 20px;
}

p { margin: 0 0 12px; }

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.timeline li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
}

.timeline .when {
  color: var(--muted);
  font-size: 0.9rem;
  padding-top: 2px;
}

.timeline .what strong {
  display: block;
  margin-bottom: 4px;
}

.timeline .what p {
  margin: 0;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.card {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card-bg);
  text-decoration: none;
  color: var(--fg);
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

.skills {
  margin: 0;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 10px 16px;
}

.skills dt {
  color: var(--muted);
  font-size: 0.9rem;
  padding-top: 1px;
}

.skills dd {
  margin: 0;
}

ul.plain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

footer.wrap {
  padding: 32px 24px 48px;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 480px) {
  .timeline li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .skills {
    grid-template-columns: 1fr;
    gap: 2px 0;
  }
  .skills dt {
    margin-top: 10px;
  }
}