/* AI for Health Lab — shared stylesheet
   Neutral palette: warm stone background, charcoal text, muted slate accent. */

:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #2a2a28;
  --muted: #6a6862;
  --rule: #e0ddd6;
  --accent: #4b5d6b;
  --accent-soft: #e9ecee;
  --tag-bg: #efede8;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max: 960px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover { border-bottom-color: currentColor; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 22px;
  padding-bottom: 18px;
}
.brand { display: flex; flex-direction: column; border: 0; color: var(--text); }
.brand:hover { border: 0; }
.brand-name { font-family: var(--serif); font-size: 1.6rem; font-weight: 600; letter-spacing: -0.01em; line-height: 1.2; }
.brand-sub { font-size: 0.85rem; color: var(--muted); letter-spacing: 0.02em; }

nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 22px; }
nav a { color: var(--muted); font-size: 0.95rem; padding: 4px 0; border-bottom: 2px solid transparent; }
nav a:hover { color: var(--text); border-bottom-color: var(--rule); }
nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- Main ---------- */
main { padding: 44px 0 64px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: 2rem; margin: 0 0 12px; }
h2 { font-size: 1.35rem; margin: 48px 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--rule); }
h3 { font-size: 1.1rem; margin: 0 0 6px; }
main > .wrap > h2:first-child, section:first-child > h2 { margin-top: 0; }

.lede { font-size: 1.12rem; color: var(--text); max-width: 46em; }
.muted { color: var(--muted); }

/* ---------- Home hero ---------- */
.hero { padding-bottom: 8px; }
.hero p { max-width: 46em; }

.highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 18px 20px;
}
.card h3 { font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; }

/* ---------- News ---------- */
.news { list-style: none; margin: 0; padding: 0; }
.news li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}
.news li:last-child { border-bottom: 0; }
.news time { color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; }

/* ---------- Research ---------- */
.area { display: grid; grid-template-columns: 1fr; gap: 6px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
.area:last-of-type { border-bottom: 0; }
.area p { margin: 4px 0; max-width: 46em; }
.area .meta { font-size: 0.9rem; color: var(--muted); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; padding: 0; list-style: none; }
.chips li { background: var(--tag-bg); color: var(--text); font-size: 0.85rem; padding: 3px 10px; border-radius: 999px; }

/* ---------- People ---------- */
.pi {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 22px;
}
.pi img { width: 150px; height: auto; border-radius: 4px; display: block; background: var(--tag-bg); }
.pi h3 { font-size: 1.25rem; }
.pi p { margin: 6px 0; }

.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.person { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 16px 18px; }
.person .name { font-weight: 600; }
.person .role { color: var(--muted); font-size: 0.92rem; }
.person .topic { font-size: 0.92rem; margin-top: 6px; }

.plain-list { margin: 0; padding-left: 1.1em; }
.plain-list li { margin: 4px 0; }

/* ---------- Publications ---------- */
.year { font-family: var(--serif); font-size: 1.2rem; margin: 36px 0 8px; color: var(--muted); }
.year:first-of-type { margin-top: 8px; }
.pubs { list-style: none; margin: 0; padding: 0; }
.pubs li { padding: 14px 0; border-bottom: 1px solid var(--rule); }
.pubs li:last-child { border-bottom: 0; }
.pub-title { font-weight: 600; display: block; color: var(--text); }
a.pub-title { color: var(--accent); }
.pub-authors { display: block; font-size: 0.93rem; }
.pub-venue { display: block; font-size: 0.93rem; color: var(--muted); font-style: italic; }
.pub-authors b { font-weight: 600; }
.tag { display: inline-block; font-size: 0.75rem; font-style: normal; background: var(--accent-soft); color: var(--accent); padding: 1px 8px; border-radius: 999px; margin-left: 6px; vertical-align: 1px; }

.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 4px 4px 0;
  font-size: 0.95rem;
}

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--rule); background: var(--surface); font-size: 0.9rem; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 40px; padding-top: 24px; padding-bottom: 28px; }
.site-footer address { font-style: normal; line-height: 1.55; }
.site-footer strong { color: var(--text); font-weight: 600; }

/* ---------- Small screens ---------- */
@media (max-width: 640px) {
  main { padding: 32px 0 48px; }
  h1 { font-size: 1.65rem; }
  .news li { grid-template-columns: 1fr; gap: 2px; }
  .pi { grid-template-columns: 1fr; }
  .pi img { width: 120px; }
}