/* Aly Magassouba: site styles. Colours are tokens; dark mode redefines the tokens only. */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1b2230;
  --muted: #5a6270;
  --rule: #dfe3ea;
  --accent: #1f4e79;
  --accent-soft: #e6eef6;
  --tag: #8a5a00;
  --tag-bg: #fbf1dc;
  --measure: 68ch;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Source Sans 3", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11151b;
    --surface: #171c24;
    --text: #e3e7ee;
    --muted: #9aa3b2;
    --rule: #2a313c;
    --accent: #8db8e3;
    --accent-soft: #1d2a38;
    --tag: #f0c56b;
    --tag-bg: #2d2615;
  }
}
:root[data-theme="dark"] {
  --bg: #11151b; --surface: #171c24; --text: #e3e7ee; --muted: #9aa3b2;
  --rule: #2a313c; --accent: #8db8e3; --accent-soft: #1d2a38; --tag: #f0c56b; --tag-bg: #2d2615;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 var(--sans);
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 16px; }

/* header */
.site-header { border-bottom: 1px solid var(--rule); background: var(--surface); }
.header-inner { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 8px 24px; padding-top: 14px; padding-bottom: 14px; }
.brand { font: 600 1.15rem var(--serif); color: var(--text); text-decoration: none; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.97rem; padding: 2px 0;
  border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }

main { padding-top: 40px; padding-bottom: 56px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.25; text-wrap: balance; }
h1 { font-size: 2.1rem; margin: 0 0 6px; }
h2 { font-size: 1.35rem; margin: 40px 0 14px; padding-bottom: 6px; border-bottom: 1px solid var(--rule); }
h3 { font-size: 1.08rem; margin: 22px 0 6px; }
p, li { max-width: var(--measure); }
.lede { font-size: 1.12rem; }
.muted { color: var(--muted); }

/* profile block on the home page */
.profile { display: grid; grid-template-columns: 160px 1fr; gap: 28px; align-items: start; }
.portrait { width: 160px; height: 160px; border-radius: 50%; background: var(--accent-soft);
  display: grid; place-items: center; font: 600 2.6rem var(--serif); color: var(--accent);
  overflow: hidden; }
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.role { font-size: 1.1rem; color: var(--accent); margin: 0; }
.affil { color: var(--muted); margin: 2px 0 14px; }
.links-row { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 0; margin: 12px 0 0; list-style: none; }
.links-row a { font-size: 0.95rem; overflow-wrap: anywhere; }
p, li { overflow-wrap: break-word; }

/* two-column facts (education, awards, positions) */
.facts { list-style: none; padding: 0; margin: 0; }
.facts li { display: grid; grid-template-columns: 7.5rem 1fr; gap: 4px 16px; padding: 6px 0;
  max-width: none; border-bottom: 1px solid var(--rule); }
.facts li:last-child { border-bottom: 0; }
.facts .when { color: var(--muted); font-variant-numeric: tabular-nums; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; }
.chips li { background: var(--accent-soft); color: var(--text); border-radius: 999px;
  padding: 3px 12px; font-size: 0.93rem; }

/* research themes */
.theme { padding: 4px 0 8px; }
.theme p { margin: 6px 0; }

/* publications */
.pubs { list-style: none; padding: 0; margin: 0; }
.pub { display: grid; grid-template-columns: 3.5rem 1fr; gap: 0 14px; padding: 10px 0;
  border-bottom: 1px solid var(--rule); max-width: none; }
.pub:last-child { border-bottom: 0; }
.pub .year { color: var(--muted); font-variant-numeric: tabular-nums; }
.pub .title { font-weight: 600; }
.pub .authors { color: var(--text); font-size: 0.95rem; }
.pub .me { font-weight: 600; text-decoration: underline; text-decoration-color: var(--rule);
  text-underline-offset: 3px; }
.pub .venue, .pub .note { color: var(--muted); font-size: 0.95rem; }
.pub .links a { font-size: 0.88rem; margin-right: 8px; }
.tag { font-size: 0.78rem; letter-spacing: 0.03em; text-transform: uppercase; color: var(--tag);
  background: var(--tag-bg); border-radius: 4px; padding: 1px 6px; white-space: nowrap; }
.toc { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 0.95rem; margin: 6px 0 0; }

/* footer */
.site-footer { border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.9rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px;
  padding-top: 18px; padding-bottom: 22px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  main { padding-top: 26px; }
  h1 { font-size: 1.75rem; }
  .profile { grid-template-columns: 1fr; gap: 16px; }
  .portrait { width: 112px; height: 112px; font-size: 1.9rem; }
  .facts li { grid-template-columns: 1fr; gap: 0; }
  .pub { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* research themes, news, featured publication */
.themes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.theme-card { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px; background: var(--surface);
  border: 1px solid var(--rule); border-radius: 8px; color: var(--text); text-decoration: none; }
.theme-card strong { font-family: var(--serif); font-size: 1.05rem; color: var(--accent); }
.theme-card span { color: var(--muted); font-size: 0.95rem; }
.theme-card:hover { border-color: var(--accent); }
.selected .pubs li:first-child { border-left: 3px solid var(--accent); padding-left: 12px; background: var(--accent-soft);
  border-radius: 0 6px 6px 0; }
.news li strong { font-weight: 600; }
.theme-section { scroll-margin-top: 16px; }
.tagline { font-family: var(--serif); font-size: 1.08rem; color: var(--accent); margin: 0 0 10px; }
.projects { padding-left: 1.2em; }
.projects li { margin: 6px 0; }
.feature { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 10px 14px;
  border-radius: 0 6px 6px 0; margin: 10px 0 14px; }
.feature p { margin: 2px 0; }
.feature-label { font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.theme-pubs { margin: 8px 0 4px; }
.theme-pubs summary { cursor: pointer; color: var(--accent); font-weight: 600; padding: 4px 0; }
.themes { display: inline-flex; flex-wrap: wrap; gap: 4px 10px; margin-top: 2px; }
.theme-tag { font-size: 0.8rem; color: var(--muted); text-decoration: none; border: 1px solid var(--rule);
  border-radius: 999px; padding: 0 8px; }
.theme-tag:hover { color: var(--accent); border-color: var(--accent); }
.portrait { background: transparent; }