:root{
  --paper:#F5F6F4;
  --panel:#FFFFFF;
  --ink:#141821;
  --ink-soft:#515b68;
  --ink-faint:#8b95a1;
  --hair:#E7E7E1;
  --hair-strong:#D7D7CE;
  --accent:#2743A6;
  --accent-deep:#1A2E73;
  --accent-wash:#ECEFFb;
  --current:#2F6B4F;
  --current-wash:#E7F1EB;
  --star:#8A5A00;
  --star-wash:#F6EFE0;
  --hero-1:#1c2656;
  --hero-2:#0c1230;
  --hero-accent:#8FA8FF;
  --shadow:0 1px 2px rgba(20,24,33,.04), 0 8px 24px rgba(20,24,33,.06);
  --shadow-hi:0 2px 6px rgba(20,24,33,.06), 0 16px 40px rgba(26,46,115,.14);
  --radius:14px;
  --maxw:960px;
  --serif:"Spectral",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- nav ---------- */
header.nav{position:sticky;top:0;z-index:40;background:rgba(245,246,244,.88);backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--hair)}
.nav-inner{display:flex;align-items:center;gap:18px;height:60px}
.nav-name{font-family:var(--serif);font-weight:600;font-size:18px}
.nav-links{margin-left:auto;display:flex;gap:22px;align-items:center}
.nav-links a{color:var(--ink-soft);font-size:14.5px;font-weight:500}
.nav-links a:hover{color:var(--accent);text-decoration:none}
#adminToggle{border:1px solid var(--hair-strong);background:var(--panel);color:var(--ink-soft);font-family:var(--sans);font-size:13px;font-weight:600;padding:7px 13px;border-radius:8px;cursor:pointer}
#adminToggle:hover{border-color:var(--accent);color:var(--accent)}
#adminToggle.on{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ---------- hero (bold, dark) ---------- */
.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(1200px 380px at 12% -10%, rgba(120,150,255,.28), transparent 60%), linear-gradient(135deg, var(--hero-1), var(--hero-2))}
.hero-net{position:absolute;inset:0;width:100%;height:100%;opacity:.9;pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:186px 1fr;gap:38px;align-items:center;padding:60px 0 40px}
.portrait{width:186px;height:222px;object-fit:cover;border-radius:16px;border:3px solid rgba(255,255,255,.18);box-shadow:0 18px 40px rgba(0,0,0,.35);background:rgba(255,255,255,.08)}
.portrait-fallback{display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:60px;color:#cdd8ff;font-weight:600}
.hero h1{font-family:var(--serif);font-weight:700;font-size:47px;line-height:1.05;margin:0 0 10px;letter-spacing:-.5px}
.hero .role{font-size:20px;margin:0 0 3px;font-weight:500;color:#dfe6fb}
.hero .place{font-size:16px;margin:0 0 20px;color:#a9b4d6}
.quicklinks{display:flex;flex-wrap:wrap;gap:9px}
.chip{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:500;padding:7px 13px;border:1px solid rgba(255,255,255,.22);border-radius:999px;color:#e7ecfb;background:rgba(255,255,255,.06)}
.chip:hover{border-color:var(--hero-accent);color:#fff;text-decoration:none;background:rgba(255,255,255,.12)}
.chip svg{width:15px;height:15px;flex:none}

/* ---------- research highlight banner ---------- */
.hero-banner{position:relative;margin:6px 0 44px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:22px 26px;backdrop-filter:blur(4px);box-shadow:0 18px 44px rgba(0,0,0,.28)}
.hb-tagline{font-family:var(--serif);font-size:21px;line-height:1.45;font-weight:500;color:#eef2ff;margin:0 0 16px;max-width:60ch}
.hb-stats{display:flex;flex-wrap:wrap;gap:34px;margin-bottom:16px}
.hb-stat{display:flex;flex-direction:column;line-height:1.1}
.hb-num{font-family:var(--serif);font-size:32px;font-weight:700;color:var(--hero-accent)}
.hb-lab{font-size:12.5px;color:#aab5d8;font-weight:500;margin-top:3px}
.hb-pillars{display:flex;flex-wrap:wrap;gap:8px}
.hb-pill{font-size:12.5px;font-weight:600;color:#dbe3ff;background:rgba(143,168,255,.16);border:1px solid rgba(143,168,255,.28);border-radius:999px;padding:5px 12px}

/* ---------- sections ---------- */
section.block{padding:56px 0 48px;border-bottom:none}
section.block:first-of-type{padding-top:70px}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:26px}
.sec-head h2{font-family:var(--serif);font-weight:600;font-size:28px;margin:0;position:relative;padding-bottom:8px}
.sec-head h2::after{content:"";position:absolute;left:0;bottom:0;width:44px;height:3px;border-radius:2px;background:var(--accent)}
.sec-head .count{font-size:14px;color:var(--ink-faint);font-weight:500}
.lead{font-size:17.5px;line-height:1.75;color:var(--ink);text-align:justify;hyphens:auto;max-width:74ch}
.lead + .lead{margin-top:14px}
.interests{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.tag{font-size:13px;font-weight:600;color:var(--accent-deep);background:var(--accent-wash);border-radius:7px;padding:6px 12px}

/* ---------- shared card look ---------- */
.card, .row, .pub, .tl-item, .jrow{
  position:relative;background:var(--panel);border:1px solid var(--hair);
  border-radius:var(--radius);box-shadow:var(--shadow);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.row, .pub, .tl-item, .jrow{overflow:hidden}
.row::before, .pub::before, .tl-item::before, .jrow::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);opacity:.85;
}
.row:hover, .pub:hover, .tl-item:hover, .jrow:hover{transform:translateY(-3px);box-shadow:var(--shadow-hi);border-color:var(--hair-strong)}

/* education as cards */
.timeline{border-left:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.tl-item{padding:20px 22px}
.tl-item::after{display:none}
.tl-degree{font-family:var(--serif);font-size:19px;font-weight:600;margin:0 0 4px}
.tl-meta{color:var(--ink-soft);font-size:14.5px;margin:0}
.tl-year{display:inline-block;margin-top:12px;font-size:12.5px;font-weight:700;color:var(--accent-deep);background:var(--accent-wash);border-radius:7px;padding:4px 10px}

/* generic rows (positions / conferences / awards) as cards */
.row{padding:20px 24px;display:flex;gap:16px;align-items:flex-start;margin-bottom:14px}
.row-main{flex:1;min-width:0}
.row-title{font-weight:600;font-size:17px;margin:0}
.row-sub{color:var(--ink-soft);font-size:14.5px;margin:4px 0 0}
.row-side{color:var(--ink-faint);font-size:14px;white-space:nowrap;text-align:right;padding-top:2px;font-weight:500}
.pill{display:inline-block;font-size:12px;font-weight:700;padding:2px 9px;border-radius:999px;margin-left:8px;vertical-align:middle}
.pill.current{color:var(--current);background:var(--current-wash)}

/* reviewer journals as a card grid */
.grid2{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.jrow{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px 20px}
.jrow > span:first-child{font-weight:500}
.jrow .if{color:var(--accent-deep);font-size:13px;font-weight:700;white-space:nowrap;background:var(--accent-wash);padding:3px 9px;border-radius:7px}

/* ---------- publications ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.filter{font-family:var(--sans);font-size:13.5px;font-weight:600;color:var(--ink-soft);background:var(--panel);border:1px solid var(--hair-strong);border-radius:999px;padding:8px 15px;cursor:pointer;transition:all .15s}
.filter:hover{border-color:var(--accent);color:var(--accent)}
.filter.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.pub{padding:22px 24px;margin-bottom:14px}
.pub-title{font-family:var(--serif);font-size:18.5px;font-weight:600;line-height:1.35;margin:0;display:inline}
.pub-title a{color:var(--ink)}
.pub-title a:hover{color:var(--accent)}
.pub-authors{font-size:14.5px;color:var(--ink-soft);margin:7px 0 0}
.pub-authors .me{color:var(--accent-deep);font-weight:700}
.pub-venue{font-size:14.5px;margin:4px 0 0;color:var(--ink)}
.pub-venue em{color:var(--ink-soft);font-style:italic}
.badges{margin-top:11px;display:flex;flex-wrap:wrap;gap:6px}
.badge{font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:7px;letter-spacing:.2px}
.badge.q{color:var(--accent-deep);background:var(--accent-wash)}
.badge.abdc{color:#5a2d82;background:#f1ebf7}
.badge.astar{color:var(--star);background:var(--star-wash)}
.badge.if{color:var(--ink-soft);background:#eeeee8}
.ext{width:13px;height:13px;vertical-align:-1px;margin-left:5px;opacity:.5}

/* ---------- admin ---------- */
.adminctl{display:none;gap:8px;margin-top:16px;flex-wrap:wrap}
body.admin .adminctl{display:flex}
.hero .adminctl .abtn{border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.08);color:#e7ecfb}
.hero .adminctl .abtn:hover{border-color:#fff;color:#fff}
.abtn{font-size:12.5px;font-weight:600;font-family:var(--sans);border-radius:8px;padding:6px 12px;cursor:pointer;border:1px solid var(--hair-strong);background:var(--panel);color:var(--ink-soft)}
.abtn:hover{border-color:var(--accent);color:var(--accent)}
.abtn.add{border-style:dashed}
.abtn.del:hover{border-color:#b23b3b;color:#b23b3b}
.row-admin{display:none;gap:6px;flex:none;align-self:center}
body.admin .row-admin{display:flex}
.banner{display:none;background:var(--current-wash);color:var(--current);font-size:13.5px;font-weight:600;text-align:center;padding:9px}
body.admin .banner{display:block}
.src-note{display:none}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(12,18,48,.5);z-index:60;display:none;align-items:center;justify-content:center;padding:20px}
.modal-bg.open{display:flex}
.modal{background:var(--panel);border-radius:16px;max-width:560px;width:100%;max-height:88vh;overflow:auto;padding:28px;box-shadow:var(--shadow-hi)}
.modal h3{font-family:var(--serif);font-size:23px;margin:0 0 4px}
.modal p.sub{color:var(--ink-soft);font-size:14px;margin:0 0 18px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-soft);margin-bottom:5px}
.field input,.field textarea,.field select{width:100%;font-family:var(--sans);font-size:14.5px;color:var(--ink);border:1px solid var(--hair-strong);border-radius:9px;padding:10px 12px;background:var(--paper)}
.field textarea{min-height:76px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--accent-wash);border-color:var(--accent)}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:8px}
.btn{font-family:var(--sans);font-size:14px;font-weight:600;border-radius:9px;padding:10px 18px;cursor:pointer;border:1px solid transparent}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-deep)}
.btn.ghost{background:transparent;border-color:var(--hair-strong);color:var(--ink-soft)}
.btn.ghost:hover{border-color:var(--ink-soft)}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:14px;font-weight:500;padding:12px 22px;border-radius:11px;z-index:80;opacity:0;transition:opacity .25s;pointer-events:none}
.toast.show{opacity:1}

footer{padding:44px 0 60px;color:var(--ink-faint);font-size:13.5px;border-top:1px solid var(--hair);margin-top:20px}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center}
#signInLink{cursor:pointer;color:var(--ink-faint)}
#signInLink:hover{color:var(--accent);text-decoration:underline}

@media (max-width:720px){
  .hero-inner{grid-template-columns:1fr;gap:22px;padding:40px 0 30px;text-align:left}
  .portrait{width:140px;height:168px}
  .hero h1{font-size:34px}
  .hb-tagline{font-size:18px}
  .hb-stats{gap:24px}
  .hb-num{font-size:26px}
  .nav-links{display:none}
  .grid2,.timeline{grid-template-columns:1fr}
  .row{flex-wrap:wrap}
  .row-side{text-align:left;width:100%}
  .lead{text-align:left}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.hero-net{display:none}.row,.pub,.tl-item,.jrow{transition:none}}

/* ===================== COURSES ===================== */
.courses-sub{font-family:var(--serif);font-size:20px;font-weight:600;margin:8px 0 6px;color:var(--ink)}
.courses-sub.past{margin-top:36px}
.courses-hint{font-size:14px;color:var(--ink-soft);margin:0 0 18px}
.empty-note{font-size:14.5px;color:var(--ink-faint);font-style:italic;margin:6px 0}
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-bottom:8px}
.course-card{position:relative;background:var(--panel);border:1px solid var(--hair);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 22px;overflow:hidden;transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}
.course-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);opacity:.85}
.course-card.present{cursor:pointer}
.course-card.present:hover{transform:translateY(-3px);box-shadow:var(--shadow-hi);border-color:var(--hair-strong)}
.course-card.past{background:#fbfbf8;opacity:.92}
.course-card.past::before{background:var(--ink-faint)}
.cc-name{font-family:var(--serif);font-size:19px;font-weight:600;margin:0}
.cc-term{font-size:13.5px;color:var(--ink-soft);margin:4px 0 0}
.cc-open{display:inline-block;margin-top:12px;font-size:13.5px;font-weight:700;color:var(--accent)}
.cc-tag{display:inline-block;margin-top:12px;font-size:12px;font-weight:600;color:var(--ink-faint);background:#efefe9;border-radius:7px;padding:3px 9px}

/* course dashboard */
.course-view{padding:44px 0 60px;background:var(--paper);border-top:1px solid var(--hair)}
.back-link{background:none;border:none;color:var(--accent);font-family:var(--sans);font-size:14px;font-weight:600;cursor:pointer;padding:0;margin-bottom:14px}
.back-link:hover{text-decoration:underline}
.cv-title{font-family:var(--serif);font-size:30px;font-weight:700;margin:0 0 4px}
.cv-term{color:var(--ink-soft);font-size:15px;margin:0 0 6px}
.cv-desc{color:var(--ink);font-size:16px;max-width:74ch;margin:0 0 22px}

/* accordion */
.accordion{display:flex;flex-direction:column;gap:12px}
.acc-item{background:var(--panel);border:1px solid var(--hair);border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.acc-head{display:flex;align-items:center;gap:14px;padding:16px 20px;cursor:pointer;user-select:none}
.acc-head:hover{background:#fcfcfa}
.acc-num{flex:none;width:30px;height:30px;border-radius:8px;background:var(--accent-wash);color:var(--accent-deep);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}
.acc-title{flex:1;font-weight:600;font-size:16.5px;min-width:0}
.acc-chev{flex:none;color:var(--ink-faint);font-size:22px;transition:transform .2s ease;line-height:1}
.acc-item.open .acc-chev{transform:rotate(90deg)}
.acc-body{display:none;padding:4px 20px 20px 64px;border-top:1px solid var(--hair)}
.acc-item.open .acc-body{display:block}
.sess-desc{font-size:15px;color:var(--ink);margin:14px 0 8px}
.sess-kc{font-size:14px;color:var(--ink-soft);margin:0 0 14px}
.sess-kc strong{color:var(--ink)}

/* resources */
.res-list{display:flex;flex-direction:column;gap:8px;margin-top:6px}
.res-row{display:flex;align-items:center;gap:10px;justify-content:space-between}
.res-link{display:flex;align-items:center;gap:12px;flex:1;min-width:0;padding:11px 14px;border:1px solid var(--hair);border-radius:10px;background:var(--paper);text-decoration:none;transition:border-color .15s, background .15s}
.res-link:hover{border-color:var(--accent);background:var(--accent-wash);text-decoration:none}
.res-ic{font-size:20px;flex:none;line-height:1}
.res-main{display:flex;flex-direction:column;min-width:0}
.res-title{font-weight:600;font-size:15px;color:var(--ink)}
.res-desc{font-size:13px;color:var(--ink-soft)}
.res-admin{display:none;gap:6px;flex:none}
body.admin .res-admin{display:flex}
.course-admin{display:none;margin-top:16px}
body.admin .course-admin{display:block}

@media (max-width:720px){
  .course-grid{grid-template-columns:1fr}
  .acc-body{padding-left:20px}
  .cv-title{font-size:24px}
}

/* ===================== COLLAPSIBLE SECTIONS ===================== */
.block .sec-head{cursor:pointer}
.sec-toggle{margin-left:auto;color:var(--ink-faint);font-size:26px;line-height:1;transition:transform .2s ease;flex:none;align-self:center}
.block:not(.collapsed) .sec-toggle{transform:rotate(90deg)}
.block.collapsed{padding-top:28px;padding-bottom:28px}
.block.collapsed .wrap > *:not(.sec-head){display:none}
.block.collapsed .sec-head{margin-bottom:0}
.hb-admin{margin-top:16px}

/* ===================== SECTION BARS + NAV FIX + CAROUSEL (v2) ===================== */
#adminToggle{white-space:nowrap}
@media (max-width:720px){ #adminToggle{margin-left:auto} }

.block .sec-head{display:flex;align-items:center;flex-wrap:wrap;gap:6px 12px}
.sec-ic{flex:none;width:38px;height:38px;border-radius:10px;background:var(--accent-wash);color:var(--accent);display:inline-flex;align-items:center;justify-content:center;font-size:20px}
.block:not(.collapsed) .sec-ic{display:none}
.sec-toggle{margin-left:auto}
.sec-preview{display:none;flex-basis:100%;margin-left:52px;font-size:13px;color:var(--ink-soft)}
.block.collapsed .sec-preview{display:block}
.block.collapsed{padding:10px 0}
.block.collapsed .sec-head{background:var(--panel);border:0.5px solid var(--hair);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;padding:14px 16px;margin:0;box-shadow:var(--shadow);transition:background .15s,box-shadow .15s}
.block.collapsed .sec-head:hover{background:var(--accent-wash);box-shadow:var(--shadow-hi)}
.block.collapsed .sec-head h2{font-size:20px}
.block.collapsed .sec-head h2::after{display:none}

/* hero photo carousel */
.carousel{position:relative}
.carousel .cslide{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 1s ease;border-radius:16px}
.carousel .cslide.on{opacity:1}

/* photo manager (admin) */
.gallery-admin{flex-direction:column;align-items:flex-start;gap:6px}
.grow{display:flex;align-items:center;gap:8px}
.gname{font-size:12px;color:var(--ink-soft);max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}