/* ---------- Tokens ---------- */
:root {
  --bg: #ffffff;
  --text: #1f2328;
  --text-muted: #656d76;
  --border: #e5e7eb;
  --bg-soft: #f6f8fa;
  --accent: #2563eb;
  --max: 720px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Nav ---------- */
.nav { border-bottom: 1px solid var(--border); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  font-family: var(--mono);
  font-size: 0.875rem;
}
.nav-logo { color: var(--text); font-weight: 500; }
.nav-logo:hover { text-decoration: none; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { color: var(--text-muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ---------- Intro ---------- */
.intro { padding: 56px 0 8px; }
.profile { display: flex; gap: 24px; align-items: center; margin-bottom: 28px; }
.profile img {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.profile h1 { margin: 0; font-size: 1.75rem; letter-spacing: -0.02em; line-height: 1.2; }
.profile .role { margin-top: 4px; }
.profile .links {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.profile .links a { color: var(--text-muted); }
.profile .links a:hover { color: var(--accent); }
.intro p { margin: 0 0 16px; }

/* ---------- Sections ---------- */
section { padding-top: 48px; }
h2 {
  font-size: 0.85rem;
  font-family: var(--mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* ---------- Work ---------- */
.entry {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  margin-bottom: 28px;
}
.entry .when {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 3px;
}
.entry h3 { margin: 0; font-size: 1rem; font-weight: 600; }
.entry h3 .org { font-weight: 400; color: var(--text-muted); }
.entry ul { margin: 8px 0 0; padding-left: 18px; }
.entry li { margin-bottom: 4px; }
.entry .note { margin: 4px 0 0; color: var(--text-muted); font-size: 0.95rem; }

/* ---------- Projects ---------- */
.project { padding: 18px 0; border-bottom: 1px solid var(--border); }
.project:first-of-type { padding-top: 0; }
.project:last-child { border-bottom: 0; }
.project-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}
.project h3 { margin: 0; font-size: 1rem; font-weight: 600; }
.project h3 a { color: var(--text); }
.project h3 a:hover { color: var(--accent); }
.project .year { font-family: var(--mono); font-size: 0.82rem; color: var(--text-muted); flex-shrink: 0; }
.project p { margin: 6px 0 8px; color: #3d444d; }
.project .meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; }
.project .meta > a { font-family: var(--mono); font-size: 0.82rem; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 1px 7px;
  border-radius: 4px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ---------- Skills ---------- */
.skills { margin: 0; display: grid; grid-template-columns: 120px 1fr; gap: 8px 20px; }
.skills dt { font-family: var(--mono); font-size: 0.82rem; color: var(--text-muted); padding-top: 2px; }
.skills dd { margin: 0; }

/* ---------- Footer ---------- */
footer {
  margin-top: 64px;
  padding: 24px 0 40px;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-inner { display: flex; justify-content: space-between; gap: 16px; }
footer a { color: var(--text-muted); }

/* ---------- Project detail page ---------- */
.article { max-width: var(--max); margin: 0 auto; padding: 40px 24px 0; }
.back { font-family: var(--mono); font-size: 0.85rem; color: var(--text-muted); }
.article h1 { font-size: 1.9rem; line-height: 1.2; letter-spacing: -0.02em; margin: 20px 0 8px; }
.article .subtitle { font-size: 1.05rem; color: var(--text-muted); margin: 0 0 16px; }
.article h2 { margin-top: 40px; }
.article figure { margin: 28px 0; }
.article figure img { border: 1px solid var(--border); border-radius: 6px; margin: 0 auto; }
.article figcaption {
  text-align: center;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
}
.article code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 4px;
}
.highlight {
  margin: 24px 0;
  padding: 14px 18px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}
.highlight p { margin: 0; }
.btn { font-family: var(--mono); font-size: 0.9rem; }
.btn-primary::before { content: "→ "; }

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .profile { flex-direction: column; align-items: flex-start; gap: 16px; }
  .entry, .skills { grid-template-columns: 1fr; gap: 4px; }
  .skills dd { margin-bottom: 10px; }
  .project-head { flex-direction: column; gap: 2px; }
  .nav-links a:not(.nav-cta) { display: none; }
}