:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1f21;
  --muted: #62666b;
  --rule: #e4e1da;
  --accent: #1f7a6d;
  --accent-soft: #e3f0ec;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131516;
    --surface: #1b1e20;
    --text: #e8e6e1;
    --muted: #9a9ea3;
    --rule: #2c3033;
    --accent: #6cc3b2;
    --accent-soft: #1d2f2b;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: 860px; margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 3.5rem; }
.brand { font-family: var(--serif); font-size: 1.2rem; color: var(--text); }
.site-header nav { display: flex; gap: 1.25rem; font-size: 0.9rem; }
.site-header nav a { color: var(--muted); }
.site-header nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero {
  display: grid; grid-template-columns: 220px 1fr; gap: 2.5rem;
  align-items: start; padding-top: 3.5rem; padding-bottom: 1rem;
}
.portrait { border-radius: 10px; width: 220px; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 20%; }
h1 { font-family: var(--serif); font-weight: 500; font-size: 2.6rem; line-height: 1.1; margin: 0 0 0.75rem; }
.lede { font-family: var(--serif); font-size: 1.35rem; line-height: 1.4; margin: 0 0 1rem; }
.hero p { margin: 0 0 1rem; }
.links { list-style: none; padding: 0; margin: 1.25rem 0 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.links a {
  display: inline-block; padding: 0.35rem 0.85rem; border: 1px solid var(--rule);
  border-radius: 999px; font-size: 0.875rem; color: var(--text); background: var(--surface);
}
.links a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Sections */
main > .wrap + .wrap { margin-top: 2.75rem; }
.eyebrow {
  font: 600 0.75rem/1 var(--sans); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 1.25rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--rule);
}
.muted { color: var(--muted); }

.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags li { background: var(--accent-soft); color: var(--accent); padding: 0.25rem 0.75rem; border-radius: 6px; font-size: 0.875rem; }

/* Timeline */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 8rem 1fr; gap: 1rem; padding: 0.6rem 0; }
.timeline .when { color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; padding-top: 0.1rem; }
.timeline strong { font-weight: 500; }
.timeline p { margin: 0.15rem 0 0; color: var(--muted); font-size: 0.95rem; }

/* News */
.post { display: grid; grid-template-columns: 180px 1fr; gap: 1.75rem; padding: 1.5rem 0; border-bottom: 1px solid var(--rule); }
.post:last-child { border-bottom: 0; }
.post img { border-radius: 8px; width: 180px; aspect-ratio: 1; object-fit: cover; background: #fff; }
.post time { font-size: 0.8rem; color: var(--muted); letter-spacing: 0.02em; }
.post h3 { font-family: var(--serif); font-weight: 500; font-size: 1.35rem; line-height: 1.25; margin: 0.2rem 0 0.5rem; }
.post p { margin: 0 0 0.75rem; }

/* Publications */
.pub-group { font-family: var(--serif); font-weight: 500; font-size: 1.25rem; margin: 2rem 0 0.5rem; }
.pubs { list-style: none; padding: 0; margin: 0; }
.pubs li { display: grid; grid-template-columns: 3.5rem 1fr; gap: 0.75rem; padding: 0.7rem 0; border-top: 1px solid var(--rule); }
.pubs .yr { color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; padding-top: 0.1rem; }
.pubs .title { display: block; font-weight: 500; color: var(--text); line-height: 1.4; }
.pubs a.title:hover { color: var(--accent); }
.pubs .authors, .pubs .venue { display: block; font-size: 0.9rem; color: var(--muted); }
.pubs .authors b { color: var(--text); font-weight: 500; }
details { margin-top: 0.35rem; font-size: 0.85rem; }
summary { cursor: pointer; color: var(--accent); width: fit-content; }
pre {
  background: var(--surface); border: 1px solid var(--rule); border-radius: 6px;
  padding: 0.75rem; overflow-x: auto; font-size: 0.78rem; line-height: 1.5; white-space: pre-wrap; word-break: break-word;
}

.site-footer { padding-top: 3rem; padding-bottom: 3rem; color: var(--muted); font-size: 0.875rem; }

/* Mobile */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header nav { gap: 0.9rem; font-size: 0.85rem; }
  .hero { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 2rem; }
  .portrait { width: 140px; }
  h1 { font-size: 2.1rem; }
  .timeline li { grid-template-columns: 1fr; gap: 0; }
  .post { grid-template-columns: 1fr; gap: 1rem; }
  .post img { width: 100%; aspect-ratio: 16 / 9; }
}