:root {
  --bg: #fbfcfa;
  --text: #1b2e23;
  --muted: #56675c;
  --rule: #dfe6e0;
  --accent: #1f5a3c;
  --heading: #173f2b;
  --tag-bg: #e8f0ea;
  --nav-bg: #ffffff;
  --nav-text: #3e5a49;
  --nav-strong: #173f2b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121714;
    --text: #e2e9e4;
    --muted: #97a69c;
    --rule: #27312b;
    --accent: #8fcaa6;
    --heading: #b5dcc3;
    --tag-bg: #1e2922;
    --nav-bg: #18201b;
    --nav-text: #b9cbbf;
    --nav-strong: #d6eadc;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 "Source Serif 4", Georgia, serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 820px; margin: 0 auto; padding: 0 16px; }

/* Site header and tabs */
.site-head { position: sticky; top: 0; z-index: 10; background: var(--nav-bg); color: var(--nav-text); border-bottom: 1px solid var(--rule); }
.site-head .wrap {
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: 8px 24px; padding-top: 18px;
}
.site-name {
  color: var(--nav-strong); font-size: 22px; font-weight: 600; padding-bottom: 14px;
}
.site-name:hover { text-decoration: none; }
.tabs { display: flex; flex-wrap: wrap; gap: 0 4px; font: 500 14px/1 Inter, system-ui, sans-serif; }
.tabs a {
  color: var(--nav-text); opacity: 0.85;
  padding: 12px 12px 14px; border-bottom: 3px solid transparent;
}
.tabs a:hover { opacity: 1; color: var(--nav-strong); text-decoration: none; }
.tabs a.active { opacity: 1; border-bottom-color: var(--nav-strong); font-weight: 600; color: var(--nav-strong); }

main.wrap { padding-top: 40px; padding-bottom: 16px; }
section[id] { scroll-margin-top: 80px; }

/* Home */
.intro { display: flex; gap: 32px; align-items: flex-start; }
.intro img {
  width: 240px; height: auto; border-radius: 4px; flex-shrink: 0;
  border: 1px solid var(--rule);
}
h1 { color: var(--heading); font-size: 34px; font-weight: 600; line-height: 1.15; margin: 0 0 6px; letter-spacing: -0.01em; }
.role { margin: 0 0 16px; }
.contact { color: var(--muted); font: 14px/1.8 Inter, system-ui, sans-serif; margin-top: 20px; }
.contact div { margin: 0; }
.contact .email { font-size: 16px; }
.buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.btn {
  display: inline-block; padding: 8px 16px; border-radius: 6px;
  border: 1px solid var(--accent); color: var(--accent);
  font: 600 14px/1.2 Inter, system-ui, sans-serif;
}
.btn:hover { text-decoration: none; background: var(--tag-bg); }
.btn.primary { background: var(--accent); color: var(--bg); }
.btn.primary:hover { background: var(--heading); border-color: var(--heading); }

/* Sections */
section { padding: 28px 0 8px; border-top: 1px solid var(--rule); margin-top: 28px; }
main > section:first-child { border-top: 0; padding-top: 0; margin-top: 0; }
h2 {
  font: 600 13px/1 Inter, system-ui, sans-serif;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted); margin: 0 0 20px;
}
h3 { color: var(--heading); font-size: 17px; font-weight: 600; margin: 0 0 6px; }

/* Data */
.dataset {
  border: 1px solid var(--rule); border-radius: 10px;
  padding: 22px 24px; background: color-mix(in srgb, var(--tag-bg) 45%, var(--bg));
}
.dataset + .dataset { margin-top: 20px; }
.dataset h3 { font-size: 20px; margin-bottom: 8px; }
.kicker {
  font: 600 11px/1.4 Inter, system-ui, sans-serif; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--accent); margin-bottom: 6px;
}
.chips { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.chips li {
  padding: 3px 10px; border-radius: 999px; border: 1px solid var(--rule); background: var(--bg);
  font: 500 12.5px/1.5 Inter, system-ui, sans-serif; color: var(--text);
}
.dataset .note { margin: 14px 0 0; font-size: 14.5px; color: var(--muted); }
.dataset > p { margin: 0 0 16px; }
.dataset .cite { margin: 20px 0 0; font-size: 14.5px; color: var(--muted); }
.cite span { font: 600 13px/1.4 Inter, system-ui, sans-serif; color: var(--text); }

/* Discussions */
.discussions { list-style: none; padding: 0; margin: 0 0 8px; }
.year { font-size: 15px; color: var(--muted); margin: 6px 0 12px; }
.discussions li { margin: 0 0 18px; }
.discussions .title { font-weight: 600; }
.discussions .meta { color: var(--muted); font-size: 15.5px; }
.discussions .venue { font-style: italic; color: var(--text); }

/* Papers */
.paper { margin: 0 0 24px; }
.paper .title { font-weight: 600; }
.paper .meta { color: var(--muted); font-size: 15.5px; }
.paper .venue { font-style: italic; color: var(--text); }
.paper .award { color: var(--accent); font-size: 15.5px; }
.links { margin-top: 4px; font: 500 13px/1.6 Inter, system-ui, sans-serif; display: flex; flex-wrap: wrap; gap: 4px 14px; }
details { margin-top: 4px; }
summary {
  cursor: pointer; color: var(--accent); width: fit-content;
  font: 500 13px/1.6 Inter, system-ui, sans-serif;
}
details p { margin: 8px 0 0; font-size: 15.5px; color: var(--text); border-left: 2px solid var(--rule); padding-left: 14px; }

.tag {
  display: inline-block; margin-left: 6px; padding: 1px 8px;
  border-radius: 999px; background: var(--tag-bg); color: var(--muted);
  font: 500 12px/1.6 Inter, system-ui, sans-serif; vertical-align: 2px;
}
ul.plain { list-style: none; padding: 0; margin: 0 0 20px; }
ul.plain li { margin: 0 0 6px; }
.muted { color: var(--muted); }

footer {
  border-top: 1px solid var(--rule); margin-top: 32px; padding: 20px 0 40px;
  color: var(--muted); font: 13px/1.6 Inter, system-ui, sans-serif;
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .intro { flex-direction: column; gap: 20px; }
  .intro img { width: 180px; }
  h1 { font-size: 28px; }
  .tabs a { padding: 10px 8px 12px; }
  main.wrap { padding-top: 28px; }
  .dataset { padding: 18px 16px; }
}