/* Bojun Zhang | Academic homepage v5 */
:root {
  --ink:#172936; --muted:#586671; --accent:#006b64;
  --line:#e4e9e8; --soft:#f5f8f7;
  --bg-blush:#f3dfe2; --bg-sage:#dcebe2; --bg-cream:#f7f5ef;
}
* { box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:30px; }
body {
  margin:0; color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  font-size:16px; line-height:1.7; -webkit-font-smoothing:antialiased;
  background-color:var(--bg-cream);
  background-image:radial-gradient(ellipse at 0% 0%,var(--bg-blush) 0%,transparent 58%),
    radial-gradient(ellipse at 100% 25%,var(--bg-sage) 0%,transparent 62%),
    linear-gradient(135deg,#faf7f3 0%,#f0f5f0 100%);
  background-attachment:fixed; min-height:100vh;
}
a { color:var(--accent); text-decoration:none; text-underline-offset:4px; }
a:hover { text-decoration:underline; }
a:focus-visible,button:focus-visible { outline:2px solid var(--accent); outline-offset:4px; border-radius:3px; }
p,h1,h2,h3 { margin-top:0; }
p { margin-bottom:17px; }
strong { font-weight:650; }
img { max-width:100%; }
.page {
  width:min(1208px,calc(100% - 72px)); margin:40px auto; padding:44px;
  display:grid; grid-template-columns:245px minmax(0,1fr); gap:82px;
  background:rgba(255,255,255,.83); border:1px solid rgba(255,255,255,.85);
  border-radius:22px; box-shadow:0 12px 48px rgba(48,70,59,.045);
}
.profile { position:static; align-self:start; }
.portrait {
  display:block; width:190px; height:190px; object-fit:cover; object-position:center 36%;
  border-radius:50%; margin-bottom:25px; background:var(--soft);
}
h1 { font-size:31px; letter-spacing:-1.1px; line-height:1.2; margin-bottom:13px; }
.role { color:var(--muted); line-height:1.6; margin-bottom:10px; }
.affiliation { font-size:15px; line-height:1.6; margin-bottom:22px; }
.affiliation a { color:var(--ink); }
.email { font-size:15px; overflow-wrap:anywhere; }
.profile-links {
  display:grid; grid-template-columns:1fr 1fr; gap:8px 10px;
  border-top:1px solid var(--line); padding-top:18px; margin-top:18px;
  font-size:13px;
}
.profile-links a {
  display:flex; justify-content:space-between; align-items:center; gap:4px;
  min-width:0; border:1px solid #e1e8e5; border-radius:9px;
  padding:8px 9px; color:var(--ink); font-weight:550;
  background:rgba(255,255,255,.65); transition:background .18s,border-color .18s,transform .18s;
}
.profile-links a:hover { text-decoration:none; background:#eaf5f0; border-color:#a8cfc2; transform:translateY(-1px); }
.profile-links a span { color:var(--accent); font-size:12px; flex-shrink:0; }
.profile-art {
  display:block; width:100%; height:310px; margin-top:28px;
  object-fit:cover; object-position:center 42%; border-radius:6px;
}
main { min-width:0; }
.section-nav {
  display:flex; gap:30px; flex-wrap:wrap; padding-bottom:20px; margin-bottom:36px;
  border-bottom:1px solid var(--line); font-size:14px;
}
.section-nav a { color:var(--muted); }
.section-nav a:hover { color:var(--accent); }
.eyebrow { font-size:12px; letter-spacing:1.1px; text-transform:uppercase; color:var(--accent); font-weight:700; margin-bottom:12px; }
h2 { font-size:27px; line-height:1.3; letter-spacing:-.65px; margin-bottom:22px; }
.about h2 { font-size:39px; letter-spacing:-1.5px; margin-bottom:21px; }
.about p:not(.eyebrow) { color:var(--muted); }
.about .intro { font-size:18px; line-height:1.8; color:var(--ink)!important; }
.section { margin-top:42px; padding-top:30px; border-top:1px solid var(--line); }
.publication { display:grid; grid-template-columns:56px minmax(0,1fr); gap:22px; }
.publication-year { font-size:14px; color:var(--muted); padding-top:1px; }
.venue { font-size:12px; color:var(--accent); font-weight:700; letter-spacing:.3px; margin-bottom:9px; }
.venue span { font-weight:400; color:var(--muted); margin-left:12px; }
.publication h3 { font-size:20px; line-height:1.5; letter-spacing:-.3px; margin-bottom:10px; }
.publication h3 a { color:var(--ink); }
.authors { font-size:15px; color:var(--muted); margin-bottom:11px; }
.authors strong { color:var(--ink); }
.paper-links { display:flex; flex-wrap:wrap; gap:18px; font-size:13px; font-weight:600; }
.paper-links span { font-size:14px; }
.publication+.publication { margin-top:28px; padding-top:28px; border-top:1px solid var(--line); }
/* Interactive horizontal timeline */
.timeline-heading { display:flex; align-items:baseline; flex-wrap:wrap; gap:6px 20px; justify-content:space-between; }
.timeline-heading h2 { margin-bottom:13px; }
.timeline-heading p { font-size:12px; color:var(--muted); margin:0 0 13px; }
.timeline-scroller { overflow-x:auto; overscroll-behavior-x:contain; padding:3px 1px 9px; scrollbar-width:thin; scrollbar-color:#b8cac4 transparent; }
.timeline-track { display:flex; width:100%; min-width:560px; position:relative; }
.timeline-track::before { content:""; height:2px; position:absolute; top:42px; left:10%; right:10%; background:#d4e3df; pointer-events:none; }
.timeline-step {
  appearance:none; display:flex; flex:1 1 0; min-width:0;
  align-items:center; flex-direction:column; gap:0; text-align:center;
  border:0; background:transparent; cursor:pointer;
  padding:0 5px 8px; color:var(--muted); font:inherit; line-height:1.4;
  scroll-snap-align:center;
}
.timeline-date { font-size:12px; letter-spacing:.1px; white-space:nowrap; font-variant-numeric:tabular-nums; }
.timeline-dot {
  display:block; position:relative; z-index:1; width:15px; height:15px;
  margin:18px 0 13px; border:3px solid #accbc2; background:#fff; border-radius:100%;
  box-shadow:0 0 0 4px #f8fbf9; transition:background .18s,border-color .18s,transform .18s;
}
.timeline-name { font-size:14px; font-weight:700; color:var(--ink); }
.timeline-type { font-size:11px; margin-top:2px; color:var(--muted); }
.timeline-step:hover .timeline-dot { transform:scale(1.25); border-color:var(--accent); }
.timeline-step[aria-selected="true"] .timeline-dot { background:var(--accent); border-color:var(--accent); transform:scale(1.22); }
.timeline-step[aria-selected="true"] .timeline-date,
.timeline-step[aria-selected="true"] .timeline-name { color:var(--accent); }
.timeline-detail {
  display:grid; grid-template-columns:218px minmax(0,1fr); gap:23px; align-items:center;
  margin-top:13px; padding:15px; min-height:184px;
  border:1px solid #e0eae6; border-radius:15px;
  background:linear-gradient(112deg,#f3f9f6 0%,rgba(255,255,255,.85) 95%);
}
.timeline-detail[hidden] { display:none; }
.timeline-detail img { display:block; width:218px; height:154px; object-fit:cover; border-radius:10px; background:var(--soft); }
.timeline-detail-body { min-width:0; }
.timeline-kicker { font-size:11px; text-transform:uppercase; letter-spacing:.7px; color:var(--accent)!important; font-weight:700; margin-bottom:9px; }
.timeline-detail h3 { font-size:19px; line-height:1.35; letter-spacing:-.3px; margin-bottom:7px; }
.timeline-detail-body>p:last-child { color:var(--muted); font-size:14px; line-height:1.65; margin:0; }
.photo-credits { margin-top:28px; font-size:12px; color:var(--muted); }
.photo-credits summary { cursor:pointer; }
.photo-credits p { margin:10px 0 0; line-height:1.7; }
footer {
  border-top:1px solid var(--line); margin-top:35px; padding-top:20px;
  display:flex; justify-content:space-between; gap:20px; font-size:12px; color:var(--muted);
}
.skip-link { position:absolute; left:12px; top:-100px; background:#fff; padding:12px; z-index:5; }
.skip-link:focus { top:12px; }
section { scroll-margin-top:20px; }
@media(max-width:1050px) {
  .page { gap:45px; grid-template-columns:215px minmax(0,1fr); }
  .profile-links { gap:7px; }
  .profile-links a { padding:8px 7px; font-size:12px; }
}
@media(max-width:900px) {
  .page { width:calc(100% - 40px); padding:28px; margin:24px auto; gap:36px; grid-template-columns:210px minmax(0,1fr); }
  .portrait { width:170px; height:170px; }
  .venue span { display:block; margin-left:0; margin-top:3px; }
  .publication { gap:13px; grid-template-columns:40px minmax(0,1fr); }
  .timeline-detail { grid-template-columns:150px minmax(0,1fr); gap:15px; }
  .timeline-detail img { width:150px; height:133px; }
  .timeline-detail h3 { font-size:17px; }
}
@media(max-width:640px) {
  .page { display:block; width:calc(100% - 24px); padding:24px 20px; margin:12px auto; border-radius:16px; }
  .profile { display:grid; grid-template-columns:100px minmax(0,1fr); column-gap:18px; margin-bottom:31px; }
  .portrait { width:100px; height:100px; grid-column:1; grid-row:1/4; margin-bottom:0; }
  .profile h1 { grid-column:2; font-size:26px; margin-bottom:8px; }
  .profile .role { grid-column:2; font-size:14px; margin-bottom:5px; }
  .affiliation { grid-column:2; font-size:13px; margin-bottom:0; }
  .email { grid-column:1/-1; margin-top:20px; }
  .profile-links { grid-column:1/-1; margin-top:14px; padding-top:14px; grid-template-columns:repeat(2,minmax(0,1fr)); }
  .profile-links a { font-size:13px; padding:9px 10px; }
  .profile-art { grid-column:1/-1; height:155px; margin-top:22px; object-position:center 42%; }
  .section-nav { gap:26px; margin-bottom:28px; padding-bottom:16px; }
  .about h2 { font-size:33px; }
  .about .intro { font-size:17px; }
  .section { margin-top:32px; padding-top:26px; }
  h2 { font-size:24px; }
  .publication { grid-template-columns:1fr; gap:8px; }
  .publication h3 { font-size:19px; }
  .venue span { display:inline; margin-left:10px; }
  .timeline-heading { gap:0 10px; }
  .timeline-heading h2 { margin-bottom:3px; }
  .timeline-heading p { width:100%; margin-bottom:8px; }
  .timeline-track { min-width:630px; }
  .timeline-step { flex:0 0 126px; }
  .timeline-detail { grid-template-columns:1fr; gap:13px; padding:12px; }
  .timeline-detail img { width:100%; height:140px; }
  .timeline-detail h3 { font-size:18px; }
  .timeline-detail-body { padding:0 3px 5px; }
  footer { flex-direction:column; gap:4px; }
  body { font-size:15px; }
}
@media(prefers-reduced-motion:reduce) {
  html { scroll-behavior:auto; }
  .profile-links a,.timeline-dot { transition:none; }
}
@media print {
  body { background:#fff; font-size:12px; }
  .page { width:100%; margin:0; padding:0; gap:35px; grid-template-columns:210px 1fr; background:#fff; border:0; border-radius:0; box-shadow:none; }
  .section-nav,.skip-link { display:none; }
  .section { break-inside:avoid; }
  .about .intro { font-size:14px; }
  .profile-art { height:210px; }
  .timeline-scroller { overflow:visible; }
  .timeline-track { min-width:0; }
  .timeline-detail { break-inside:avoid; }
}