/* ---------- tokens ---------- */
:root{
  --bg:#fbfaf8;
  --bg-alt:#f3f1ec;
  --surface:#ffffff;
  --ink:#16181d;
  --ink-soft:#4a4f5a;
  --ink-mute:#787f8c;
  --line:#e2ded6;
  --accent:#1d4ed8;
  --accent-soft:#e8edfd;
  --radius:14px;
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --wrap:1080px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e1013;
    --bg-alt:#14171c;
    --surface:#181c22;
    --ink:#eceef2;
    --ink-soft:#b3bac6;
    --ink-mute:#858d9b;
    --line:#262b33;
    --accent:#7ea2ff;
    --accent-soft:#1b2540;
  }
}
:root[data-theme="dark"]{
  --bg:#0e1013;
  --bg-alt:#14171c;
  --surface:#181c22;
  --ink:#eceef2;
  --ink-soft:#b3bac6;
  --ink-mute:#858d9b;
  --line:#262b33;
  --accent:#7ea2ff;
  --accent-soft:#1b2540;
}

/* ---------- base ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  margin:0;background:var(--bg);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;text-underline-offset:3px}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.015em;line-height:1.12;margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--accent);color:#fff;padding:10px 16px;border-radius:8px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--bg) 85%,transparent);
  backdrop-filter:blur(12px);border-bottom:1px solid transparent;
  transition:border-color .2s;
}
.nav.scrolled{border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{
  display:flex;align-items:center;gap:10px;color:var(--ink);
  font-weight:600;font-size:15px;letter-spacing:-.01em;margin-right:auto;
}
.brand:hover{text-decoration:none}
.brand-mark{
  display:grid;place-items:center;width:28px;height:28px;border-radius:8px;
  background:var(--accent);color:#fff;font-family:var(--serif);font-size:13px;
}
.nav-inner>nav{min-width:0;overflow-x:auto;overflow-y:hidden;padding-bottom:8px;margin-bottom:-8px;scrollbar-width:none;-ms-overflow-style:none}
.nav-inner>nav::-webkit-scrollbar{display:none}
.nav-links{display:flex;flex-wrap:nowrap;gap:26px;list-style:none;margin:0;padding:0;white-space:nowrap}
.nav-links a{color:var(--ink-soft);font-size:14.5px;font-weight:500;position:relative}
.nav-links a:hover{color:var(--ink);text-decoration:none}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
  background:var(--accent);border-radius:2px;
}
.theme-btn{
  display:grid;place-items:center;width:34px;height:34px;flex:none;
  border:1px solid var(--line);border-radius:9px;background:var(--surface);
  color:var(--ink-soft);cursor:pointer;transition:color .15s,border-color .15s;
}
.theme-btn:hover{color:var(--ink);border-color:var(--ink-mute)}
.theme-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.i-moon{display:none}
:root[data-theme="dark"] .i-sun{display:none}
:root[data-theme="dark"] .i-moon{display:block}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .i-sun{display:none}
  :root:not([data-theme="light"]) .i-moon{display:block}
}
/* small screens: keep navigation, drop the wordmark */
@media (max-width:660px){
  .brand-text{display:none}
  .brand{margin-right:12px}
  .nav-inner{gap:12px}
  .nav-links{gap:16px}
  .nav-links a{font-size:13.5px}
}
@media (max-width:420px){
  .wrap{padding:0 16px}
  .nav-links{gap:12px}
  .nav-links a{font-size:12.5px}
}
@media (max-width:380px){
  .wrap{padding:0 14px}
  .nav-inner{gap:8px}
  .nav-links{gap:10px}
  .nav-links a{font-size:11.5px;letter-spacing:-.01em}
}

/* ---------- hero ---------- */
.hero{padding:clamp(56px,9vw,104px) 0 clamp(48px,7vw,84px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,.85fr);gap:clamp(32px,5vw,64px);align-items:start}
.eyebrow{
  margin:0 0 18px;font-size:12.5px;font-weight:600;letter-spacing:.09em;
  text-transform:uppercase;color:var(--accent);
}
.hero h1{font-size:clamp(46px,8.2vw,84px);letter-spacing:-.035em;margin-bottom:26px}
.lede{font-size:clamp(17.5px,2.1vw,20px);color:var(--ink-soft);margin:0 0 16px;max-width:36ch}
.sub{font-size:15.5px;color:var(--ink-mute);margin:0 0 30px;max-width:46ch}
.sub strong{color:var(--ink-soft);font-weight:600}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.btn{
  display:inline-block;padding:11px 22px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  color:var(--ink);font-size:14.5px;font-weight:500;transition:all .15s;
}
.btn:hover{text-decoration:none;border-color:var(--ink-mute);transform:translateY(-1px)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(1.08);border-color:var(--accent)}
.social{display:flex;flex-wrap:wrap;gap:8px 22px;list-style:none;margin:0;padding:0}
.social a{font-size:14px;color:var(--ink-mute)}
.social a:hover{color:var(--accent)}

.hero-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;
}
.portrait{
  position:relative;aspect-ratio:1/1;border-radius:11px;overflow:hidden;
  background:linear-gradient(140deg,var(--accent-soft),var(--bg-alt));
  display:grid;place-items:center;margin-bottom:20px;
}
.portrait img{width:100%;height:100%;object-fit:cover;display:block;position:relative;z-index:1}
.portrait-fallback{
  position:absolute;font-family:var(--serif);font-size:clamp(48px,7vw,66px);
  color:var(--accent);opacity:.32;letter-spacing:.02em;
}
.facts{margin:0;display:grid;gap:14px}
.facts>div{display:grid;gap:2px}
.facts dt{font-size:11.5px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-mute)}
.facts dd{margin:0;font-size:14.5px;color:var(--ink);line-height:1.4}
@media (max-width:840px){
  .hero-grid{grid-template-columns:1fr}
  .hero-card{max-width:400px}
}

/* ---------- bands ---------- */
.band{padding:clamp(52px,7vw,84px) 0;border-top:1px solid var(--line)}
.band.alt{background:var(--bg-alt)}
.two-col{display:grid;grid-template-columns:minmax(0,230px) minmax(0,1fr);gap:clamp(28px,5vw,60px);align-items:start}
.col-head h2{font-size:clamp(26px,3.4vw,34px);margin-bottom:10px}
.col-note{margin:0;font-size:14px;color:var(--ink-mute);line-height:1.5}
.col-note a{white-space:nowrap}
@media (max-width:760px){.two-col{grid-template-columns:1fr;gap:24px}}

.prose p{margin:0 0 17px;color:var(--ink-soft);max-width:66ch;font-size:16.5px}
.prose p:last-child{margin-bottom:0}
.prose strong{color:var(--ink);font-weight:600}
.prose em{color:var(--ink)}

/* ---------- research cards ---------- */
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 22px 22px;transition:transform .18s,border-color .18s;
}
.card:hover{transform:translateY(-3px);border-color:var(--accent)}
.card-num{
  display:block;font-family:var(--mono);font-size:11.5px;color:var(--accent);
  letter-spacing:.06em;margin-bottom:12px;
}
.card h3{font-size:17.5px;margin-bottom:9px;letter-spacing:-.01em}
.card p{margin:0;font-size:14.5px;color:var(--ink-soft);line-height:1.6}

/* ---------- publications ---------- */
.pubs{list-style:none;margin:0;padding:0;counter-reset:none}
.pub{display:grid;grid-template-columns:70px minmax(0,1fr);gap:20px;padding:24px 0;border-top:1px solid var(--line)}
.pub:first-child{border-top:none;padding-top:0}
.pub-year{
  font-family:var(--mono);font-size:13px;color:var(--ink-mute);
  padding-top:4px;letter-spacing:.02em;
}
.pub-title{font-size:18px;line-height:1.35;margin-bottom:7px;letter-spacing:-.012em}
.pub-authors{margin:0 0 4px;font-size:14.5px;color:var(--ink-soft)}
.pub-authors strong{color:var(--ink);font-weight:600}
.pub-venue{margin:0 0 12px;font-size:14px;color:var(--ink-mute);font-style:italic}
.pub-links{display:flex;flex-wrap:wrap;gap:8px;margin:0}
.pub-links a,.bib-btn{
  display:inline-block;padding:4px 12px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);
  font-size:12.5px;font-weight:500;color:var(--ink-soft);
  font-family:var(--sans);cursor:pointer;transition:all .15s;
}
.pub-links a:hover,.bib-btn:hover{
  text-decoration:none;color:var(--accent);border-color:var(--accent);background:var(--accent-soft);
}
.bib-btn.open{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.bib{
  margin:14px 0 0;padding:16px;border-radius:10px;overflow-x:auto;
  background:var(--bg-alt);border:1px solid var(--line);
  font-family:var(--mono);font-size:12.5px;line-height:1.65;color:var(--ink-soft);
  white-space:pre;
}
.band.alt .bib{background:var(--bg)}
.pub-foot{margin:26px 0 0;font-size:14px;color:var(--ink-mute)}
@media (max-width:560px){
  .pub{grid-template-columns:1fr;gap:8px}
  .pub-year{padding-top:0}
}

/* ---------- contact ---------- */
.contact-lede{margin:0 0 22px;color:var(--ink-soft);max-width:56ch}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:0;max-width:520px}
.contact-list li{
  display:grid;grid-template-columns:110px minmax(0,1fr);gap:14px;
  padding:12px 0;border-bottom:1px solid var(--line);align-items:baseline;
}
.contact-list li:last-child{border-bottom:none}
.contact-list span{font-size:12px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-mute)}
.contact-list .plain{font-size:15px;font-weight:400;letter-spacing:0;text-transform:none;color:var(--ink-soft)}
.contact-list a{font-size:15px;word-break:break-word}
@media (max-width:460px){.contact-list li{grid-template-columns:1fr;gap:3px}}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);padding:26px 0;background:var(--bg)}
.foot-inner{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;align-items:center}
.foot p{margin:0;font-size:13.5px;color:var(--ink-mute)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(14px)}
.reveal.in{opacity:1;transform:none;transition:opacity .55s ease,transform .55s cubic-bezier(.22,.7,.3,1)}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.in{opacity:1;transform:none;transition:none}
  .card:hover,.btn:hover{transform:none}
}