:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --line: #e6e3dc;
  --accent: #8a2432;
  --accent-soft: #f6e9eb;
  --link-line: rgba(138, 36, 50, .35);
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141416;
    --surface: #1c1c1f;
    --text: #ececec;
    --muted: #a0a0a8;
    --line: #2e2e33;
    --accent: #e48a96;
    --accent-soft: #3a2328;
    --link-line: rgba(228, 138, 150, .4);
  }
}

* { 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: 17px;
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.wrap { max-width: 860px; margin: 0 auto; padding: 0 24px; }

/* Colour roles
   --text   all content: names, titles, headings
   --muted  secondary details: coauthors, journals, captions
   --accent only what you can click, the active nav item and the short bar under section headings */

/* Header */
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; height: 64px;
}
.brand {
  font-family: var(--serif); font-size: 21px; font-weight: 600;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
nav { display: flex; gap: 26px; }
nav a { color: var(--muted); font-size: 15px; font-weight: 500; }
nav a:hover { color: var(--text); text-decoration: none; }
nav a.active { color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); }

main { padding: 56px 0 72px; }

/* Home */
.home .wrap { max-width: 1040px; }
.hero {
  display: grid; grid-template-columns: 280px 1fr; gap: 56px; align-items: center;
  font-size: 19px;
}
.hero img {
  width: 280px; height: 320px; object-fit: cover; border-radius: 8px;
  display: block;
}
.hero h1 {
  font-family: var(--serif); font-weight: 600; font-size: 50px;
  line-height: 1.1; margin: 0 0 8px;
}
.role { color: var(--muted); margin: 0 0 22px; font-size: 19px; }
.role strong { color: var(--text); font-weight: 500; }
.hero p { margin: 0 0 16px; }
.fields { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 26px; padding: 0; list-style: none; }
.fields li {
  font-size: 15px; padding: 5px 14px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); font-weight: 500;
}
.links { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15.5px; font-weight: 500;
  padding: 10px 18px; border-radius: 6px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
}
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #141416; } }
.btn.primary:hover { opacity: .9; color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary:hover { color: #141416; } }

/* Research and packages */
h1.page {
  font-family: var(--serif); font-weight: 600; font-size: 36px; margin: 0 0 28px;
}
.lede { color: var(--muted); margin: -16px 0 36px; }
section + section { margin-top: 36px; }
h2 {
  font-family: var(--serif); font-size: 25px; font-weight: 600;
  color: var(--text); margin: 0 0 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--line); position: relative;
}
h2::after {
  content: ""; position: absolute; left: 0; bottom: -1px;
  width: 44px; height: 3px; background: var(--accent);
}
.papers { margin: 0; padding-left: 1.2em; }
.papers li { margin: 0 0 8px; padding-left: 2px; line-height: 1.5; }
.papers li::marker { color: var(--muted); }
.papers .t { font-weight: 500; color: var(--text); }
.papers a.t {
  color: var(--text); text-decoration: underline;
  text-decoration-color: var(--link-line); text-decoration-thickness: 1px; text-underline-offset: 3px;
}
.papers a.t:hover { color: var(--accent); text-decoration-color: var(--accent); }
.papers .co { color: var(--muted); }
.papers .desc { display: block; color: var(--muted); font-size: 15px; margin-top: 2px; }
section > .lede { margin: 0 0 10px; }
.tag {
  display: inline-block; vertical-align: 1px; margin-left: 4px;
  font-size: 12px; font-weight: 500; line-height: 1.4;
  padding: 1px 8px; border-radius: 4px;
  border: 1px solid var(--line); color: var(--muted);
}
a.tag:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.home-grid {
  display: grid; grid-template-columns: 3fr 2fr; gap: 56px;
  margin-top: 64px; padding-top: 0;
}
.home-grid section + section { margin-top: 0; }
.home-grid h2 { font-size: 22px; }
.pkgs { list-style: none; margin: 0; padding: 0; }
.pkgs li { margin: 0 0 14px; line-height: 1.45; }
.pkgs .co { display: block; color: var(--muted); font-size: 15px; }
.mono { font-family: "Source Code Pro", ui-monospace, monospace; }
a.t.mono {
  color: var(--text); font-weight: 500; text-decoration: underline;
  text-decoration-color: var(--link-line); text-underline-offset: 3px;
}
a.t.mono:hover { color: var(--accent); text-decoration-color: var(--accent); }
.more { display: inline-block; margin-top: 6px; font-size: 15px; font-weight: 500; }

.pkg {
  border: 1px solid var(--line); background: var(--surface); border-radius: 8px;
  padding: 22px 24px; margin-bottom: 16px;
}
.pkg h3 { margin: 0; font-size: 21px; }
.pkg .pkg-title { margin: 6px 0 2px; color: var(--text); font-weight: 500; }
.pkg .pkg-note { margin: 0 0 14px; color: var(--muted); font-size: 15px; }
.install {
  display: block; margin: 0 0 16px; padding: 9px 14px; border-radius: 6px;
  background: var(--bg); border: 1px solid var(--line);
  font-family: "Source Code Pro", ui-monospace, monospace; font-size: 14px; color: var(--text);
  overflow-x: auto; white-space: nowrap;
}
section .pkg:first-of-type { margin-top: 18px; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 680px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  header.site .wrap { height: auto; padding-top: 14px; padding-bottom: 14px; flex-direction: column; align-items: flex-start; gap: 8px; }
  nav { gap: 20px; }
  main { padding: 36px 0 56px; }
  .hero { grid-template-columns: 1fr; gap: 24px; font-size: 17px; }
  .hero img { width: 150px; height: 172px; }
  .hero h1 { font-size: 34px; }
  .role { font-size: 17px; }
  .home-grid { grid-template-columns: 1fr; gap: 40px; margin-top: 48px; }
  h1.page { font-size: 30px; }
}