:root{
  --bg:#fbfaf7; --surface:#ffffff; --text:#1d2329; --muted:#5d6670; --line:#e4e1da;
  --accent:#23446b; --accent-soft:#e7edf4; --chip:#f1efe9;
  --serif:"Source Serif 4",Georgia,serif; --sans:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --radius:10px; --shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.05);
}
@media (prefers-color-scheme:dark){
  :root{--bg:#14171b;--surface:#1c2026;--text:#e6e8eb;--muted:#9aa3ad;--line:#2c3239;
    --accent:#8fb4e0;--accent-soft:#1f2a37;--chip:#232830;--shadow:none}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.25;margin:0}
h1{font-size:2.4rem}
h2{font-size:1.8rem;margin-bottom:1.2rem;padding-bottom:.5rem;border-bottom:1px solid var(--line)}
h3.sub{font-size:1.15rem;margin:2rem 0 1rem;color:var(--muted);font-family:var(--sans);font-weight:600;text-transform:uppercase;letter-spacing:.06em;font-size:.82rem}
h4{font-size:1.05rem;margin-bottom:.4rem}
.muted{color:var(--muted)} .small{font-size:.9rem}
section{padding:56px 0 8px}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-family:var(--serif);font-weight:600;font-size:1.2rem;color:var(--text)}
.nav-links{display:flex;gap:26px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--muted);font-weight:500;font-size:.95rem}
.nav-links a:hover,.nav-links a.active{color:var(--accent);text-decoration:none}
.nav-toggle{display:none;background:none;border:0;font-size:1.4rem;color:var(--text);cursor:pointer}

/* about */
.about{display:grid;grid-template-columns:220px 1fr;gap:44px;align-items:start;padding-top:64px}
.headshot{width:220px;height:260px;object-fit:cover;object-position:61% 25%;border-radius:var(--radius);box-shadow:var(--shadow)}
.role{font-size:1.1rem;color:var(--muted);margin:.3rem 0 1.2rem}
.contact{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:1.4rem 0 0}
.contact a{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface);font-size:.9rem;font-weight:500}
.contact a:hover{border-color:var(--accent);text-decoration:none}

/* featured */
.featured-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.fcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:pointer;display:flex;flex-direction:column;text-align:left;padding:0;font:inherit;color:inherit;transition:transform .15s,box-shadow .15s,border-color .15s}
.fcard:hover,.fcard:focus-visible{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--accent)}
.fcard .thumb{height:170px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden;padding:8px}
.fcard .thumb img{max-width:100%;max-height:100%;object-fit:contain}
.fcard .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}
.fcard .title{font-family:var(--serif);font-size:1.1rem;font-weight:600;line-height:1.3}
.fcard .more{margin-top:auto;padding-top:8px;font-size:.85rem;color:var(--accent);font-weight:500}
.authors{color:var(--muted);font-size:.92rem}
.venue{font-style:italic;font-size:.92rem}

/* filters */
.list-head{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.list-head h3.sub{margin-bottom:1rem}
#search{flex:0 1 320px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--text);font:inherit;font-size:.92rem}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.chip{border:1px solid var(--line);background:var(--chip);color:var(--text);border-radius:999px;padding:5px 13px;font:inherit;font-size:.85rem;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--bg)}
.chip .n{opacity:.65;margin-left:4px}

/* paper list */
#paper-list{margin-top:14px;border-top:1px solid var(--line)}
.prow{border-bottom:1px solid var(--line)}
.prow>button{all:unset;box-sizing:border-box;display:grid;grid-template-columns:1fr auto;gap:16px;width:100%;padding:16px 4px;cursor:pointer}
.prow>button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.prow .ptitle{font-family:var(--serif);font-weight:600;font-size:1.05rem;line-height:1.35}
.prow>button:hover .ptitle{color:var(--accent)}
.prow .year{color:var(--muted);font-size:.9rem;white-space:nowrap}
.prow .caret{display:inline-block;transition:transform .2s;margin-left:6px;color:var(--muted)}
.prow.open .caret{transform:rotate(90deg)}
.pdetail{display:none;padding:0 4px 20px}
.prow.open .pdetail{display:block}
.badge{display:inline-block;font-size:.72rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:2px 8px;border-radius:4px;background:var(--accent-soft);color:var(--accent);margin-left:8px;vertical-align:2px}

/* details shared by list + modal */
.abstract{margin:.6rem 0 1rem;max-width:72ch}
.abstract-label{margin-top:1rem;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
.figure{margin:0;align-self:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px}
.figure img{width:100%;height:auto;display:block}
.figure figcaption{font-size:.85rem;color:var(--muted);margin-top:8px}
.links{display:flex;flex-wrap:wrap;gap:8px;margin:.6rem 0}
.btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:6px;border:1px solid var(--accent);color:var(--accent);background:transparent;font:inherit;font-size:.88rem;font-weight:500;cursor:pointer}
.btn:hover{background:var(--accent);color:var(--bg);text-decoration:none}
.media{font-size:.9rem;margin-top:.6rem}
.media a{white-space:nowrap}
.tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.tag{font-size:.75rem;color:var(--muted);background:var(--chip);border-radius:4px;padding:1px 8px}
pre.bib{white-space:pre-wrap;font-size:.8rem;background:var(--chip);padding:12px;border-radius:6px;display:none}
pre.bib.show{display:block}
.note{font-size:.88rem;color:var(--muted)}

/* ongoing */
.ongoing{list-style:none;padding:0;margin:0}
.ongoing li{padding:10px 0;border-bottom:1px solid var(--line)}
.ongoing .t{font-family:var(--serif);font-weight:600}

/* teaching */
.teach-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:28px}
.teach-grid ul{padding-left:18px;margin:0}

/* students */
.lede{max-width:72ch}
.student-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.scard{all:unset;box-sizing:border-box;cursor:pointer;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:border-color .15s,box-shadow .15s}
.scard:hover,.scard:focus-visible{border-color:var(--accent);box-shadow:var(--shadow)}
.scard .simg{height:120px;background:var(--accent-soft) center/cover no-repeat}
.scard .sbody{padding:12px 14px 14px}
.scard .stitle{font-family:var(--serif);font-weight:600;font-size:.98rem;line-height:1.3}
.scard .sauthor{color:var(--muted);font-size:.85rem;margin-top:4px}

/* modal */
dialog{width:min(1120px,calc(100vw - 32px));max-height:calc(100vh - 48px);border:0;border-radius:14px;padding:32px 34px;background:var(--surface);color:var(--text);box-shadow:0 20px 60px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(15,20,28,.55)}
dialog .close{position:absolute;top:12px;right:16px;border:0;background:none;font-size:1.8rem;color:var(--muted);cursor:pointer;line-height:1}
dialog h3{font-size:1.5rem;margin:0 24px .5rem 0}

.footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:48px 20px 40px;margin-top:40px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}

@media (max-width:720px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 20px}
  .nav-links.open{display:flex}
  .nav-links li a{display:block;padding:10px 0}
  .about{grid-template-columns:1fr;gap:24px;padding-top:36px}
  .headshot{width:160px;height:190px}
  h1{font-size:2rem}
  dialog{padding:26px 20px}
  #search{flex:1 1 100%}
}

/* paper detail: abstract + figure side by side */
.pgrid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;align-items:start}
.pgrid.nofig{grid-template-columns:minmax(0,1fr);max-width:760px}
.pgrid .abstract-label{margin-top:.4rem}
.takeaway-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);font-weight:600}
.takeaway{margin:.25rem 0 .7rem;font-family:var(--serif);font-size:1.02rem;line-height:1.4}
.figure img{background:#fff;border-radius:4px;cursor:zoom-in}
@media (max-width:820px){.pgrid{grid-template-columns:1fr}.pgrid .figure{order:-1}}