:root{
  --bg:#F2F5F4; --surface:#FFFFFF; --ink:#1B2430; --muted:#566270; --line:#D8DFDD;
  --accent:#0F5C63; --accent-soft:#E1EEEE; --signal:#E3A008; --signal-soft:#FDF3D6;
  --serif:"Newsreader", Georgia, "Times New Roman", serif;
  --sans:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#11181D; --surface:#172127; --ink:#E4EBE9; --muted:#9AA8A6; --line:#2A3740;
    --accent:#6FC3C6; --accent-soft:#1B3236; --signal:#F2B830; --signal-soft:#3A3013;
  }
}
:root[data-theme="dark"]{
  --bg:#11181D; --surface:#172127; --ink:#E4EBE9; --muted:#9AA8A6; --line:#2A3740;
  --accent:#6FC3C6; --accent-soft:#1B3236; --signal:#F2B830; --signal-soft:#3A3013;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 72px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6}
img{max-width:100%}
a{color:var(--accent);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:3px}
h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.15;margin:0}
h2{font-size:clamp(1.8rem,4vw,2.5rem);letter-spacing:-.01em}
h3{font-size:1.3rem}
p{margin:0 0 1em}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.narrow{max-width:720px}

/* header */
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.mono{width:38px;height:38px;border-radius:50%;background:var(--accent);color:var(--bg);display:grid;place-items:center;font-family:var(--serif);font-size:1.05rem;font-weight:600;flex:none}
.brand b{font-family:var(--serif);font-weight:500;font-size:1.2rem}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
nav a{display:block;padding:8px 12px;border-radius:6px;color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:500}
nav a:hover{color:var(--ink);background:var(--accent-soft)}
nav a[aria-current="page"]{color:var(--accent);background:var(--accent-soft)}
.menu-btn{display:none;background:none;border:1px solid var(--line);color:var(--ink);border-radius:6px;padding:8px 12px;font:500 .95rem var(--sans);cursor:pointer}
@media (max-width:860px){
  .menu-btn{display:block}
  nav{position:absolute;left:0;right:0;top:64px;background:var(--bg);border-bottom:1px solid var(--line);display:none}
  nav.open{display:block}
  nav ul{flex-direction:column;padding:8px 16px 16px}
  nav a{padding:12px}
}

/* pages */
main{min-height:70vh}
.page{padding:56px 0 80px}
.page-head{margin-bottom:40px;max-width:720px}
.page-head p{color:var(--muted);font-size:1.1rem;margin-top:12px}

/* hero */
.hero{padding:72px 0 0}
.hero h1{font-size:clamp(2.8rem,8vw,5.6rem);letter-spacing:-.025em;font-weight:400}
.hero .lede{font-family:var(--serif);font-size:clamp(1.25rem,2.6vw,1.6rem);line-height:1.4;max-width:760px;margin:20px 0 0;color:var(--ink)}
.hero .role{color:var(--muted);margin-top:18px;font-size:1rem}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:6px;font-weight:500;text-decoration:none;font-size:.97rem;border:1px solid var(--accent)}
.btn.primary{background:var(--accent);color:var(--bg)}
.btn.ghost{color:var(--accent)}
.btn.ghost:hover{background:var(--accent-soft)}
.trace{display:block;width:100%;height:120px;margin:44px 0 0}
.trace path{fill:none;stroke:var(--signal);stroke-width:2.2;stroke-linejoin:round;stroke-linecap:round}
.trace .base{stroke:var(--line);stroke-width:1}
.trace-cap{display:flex;justify-content:space-between;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line);padding-top:10px}

/* home blocks */
.section{padding-top:64px}
.section > h2{margin-bottom:24px}
.themes{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.themes div{border-top:3px solid var(--accent);padding-top:16px}
.themes h3{margin-bottom:8px}
.themes p{color:var(--muted);font-size:.97rem}
@media (max-width:760px){.themes{grid-template-columns:1fr;gap:24px}}

.news{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.news li{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:16px 0;border-bottom:1px solid var(--line)}
.news time{color:var(--muted);font-size:.93rem;font-variant-numeric:tabular-nums}
.news strong{font-weight:600}
@media (max-width:560px){.news li{grid-template-columns:1fr;gap:2px}}

.feature{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:36px}
.feature .tag{display:inline-block;background:var(--signal-soft);color:var(--ink);border-radius:4px;padding:3px 10px;font-size:.85rem;font-weight:500;margin-bottom:14px}
.feature h3{font-size:1.6rem;margin-bottom:12px}
.feature p{color:var(--muted)}
.kv{margin:0;display:grid;gap:14px}
.kv div{border-left:3px solid var(--signal);padding-left:14px}
.kv dt{font-weight:600}
.kv dd{margin:0;color:var(--muted);font-size:.95rem}
@media (max-width:760px){.feature{grid-template-columns:1fr;padding:24px;gap:24px}}

/* lists */
.entry{display:grid;grid-template-columns:180px 1fr;gap:28px;padding:28px 0;border-top:1px solid var(--line)}
.entry:last-child{border-bottom:1px solid var(--line)}
.entry .when{color:var(--muted);font-size:.93rem;font-variant-numeric:tabular-nums}
.entry h3{margin-bottom:4px}
.entry .org{color:var(--muted);margin-bottom:12px}
.entry ul{margin:0;padding-left:20px}
.entry li{margin-bottom:6px}
.entry.highlight{background:var(--signal-soft);border-radius:10px;border:none;padding:28px;margin:8px 0}
@media (max-width:640px){.entry{grid-template-columns:1fr;gap:6px}}

/* publications */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.filters button{font:500 .92rem var(--sans);padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--muted);cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--bg)}
.pub{padding:26px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:72px 1fr;gap:24px}
.pub .yr{font-family:var(--serif);font-size:1.5rem;color:var(--accent)}
.pub h3{font-size:1.25rem;margin-bottom:6px}
.pub .authors{font-size:.95rem;color:var(--muted)}
.pub .authors b{color:var(--ink);font-weight:600}
.pub .venue{font-style:italic;font-size:.95rem;margin:4px 0 10px}
.pub .abs{font-size:.95rem;color:var(--muted);max-width:68ch}
.pub .links{display:flex;gap:16px;font-size:.93rem;font-weight:500;flex-wrap:wrap}
.pill{display:inline-block;font-size:.78rem;font-weight:500;padding:2px 8px;border-radius:4px;background:var(--accent-soft);color:var(--accent);margin-left:6px;vertical-align:2px;font-family:var(--sans);font-style:normal}
@media (max-width:560px){.pub{grid-template-columns:1fr;gap:4px}}

/* research */
.proj{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.proj div{padding:20px 0;border-top:1px solid var(--line)}
.proj h3{font-size:1.12rem;margin-bottom:6px}
.proj p{color:var(--muted);font-size:.95rem;margin:0}
.proj .meth{font-size:.85rem;color:var(--accent);margin-top:8px}
@media (max-width:700px){.proj{grid-template-columns:1fr}}
.current{display:grid;gap:24px}
.current article{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:26px 28px}
.current h3{margin-bottom:8px}
.current p{color:var(--muted);margin-bottom:10px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}
.chips li{font-size:.83rem;background:var(--accent-soft);color:var(--accent);padding:3px 10px;border-radius:4px}
details{border-top:1px solid var(--line);margin-top:40px}
summary{cursor:pointer;padding:18px 0;font-family:var(--serif);font-size:1.3rem;list-style-position:outside}

/* recognition */
.awards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.award{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px}
.award.top{grid-column:1/-1;border:none;background:var(--accent);color:var(--bg);padding:32px}
.award.top p,.award.top .when{color:color-mix(in srgb,var(--bg) 82%,transparent)}
.award.top a{color:var(--bg)}
.award.top h3{font-size:1.8rem}
.award .when{font-size:.88rem;color:var(--muted);margin-bottom:6px}
.award h3{margin-bottom:8px}
.award p{color:var(--muted);font-size:.95rem;margin:0}
@media (max-width:700px){.awards{grid-template-columns:1fr}}
.belts{display:flex;gap:12px;flex-wrap:wrap;margin:8px 0 0}
.belt{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px 16px;font-weight:500}
.belt i{width:28px;height:10px;border-radius:2px;border:1px solid var(--line);display:block}
.twocol{display:grid;grid-template-columns:1fr 1fr;gap:48px}
@media (max-width:760px){.twocol{grid-template-columns:1fr;gap:24px}}
.plain{list-style:none;padding:0;margin:0}
.plain li{padding:12px 0;border-top:1px solid var(--line)}
.plain li span{display:block;color:var(--muted);font-size:.9rem}

/* about */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:56px}
.about-grid .bio p{font-family:var(--serif);font-size:1.2rem;line-height:1.65}
@media (max-width:800px){.about-grid{grid-template-columns:1fr;gap:32px}}
.skills dt{font-weight:600;margin-top:18px}
.skills dd{margin:4px 0 0;color:var(--muted);font-size:.95rem}

/* contact */
.contact-big{font-family:var(--serif);font-size:clamp(1.5rem,4.5vw,2.6rem);word-break:break-word}
.contact-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:40px}
.contact-links a{display:block;padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink)}
.contact-links a:hover{border-color:var(--accent)}
.contact-links span{display:block;color:var(--muted);font-size:.9rem}

footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted)}
.theme-toggle{background:none;border:1px solid var(--line);color:var(--muted);border-radius:6px;padding:6px 10px;font:500 .85rem var(--sans);cursor:pointer}

@media (prefers-reduced-motion: reduce){ *{animation:none!important;transition:none!important} }

/* photo */
.hero-grid{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center}
.portrait{width:220px;height:220px;border-radius:50%;object-fit:cover;border:4px solid var(--surface);box-shadow:0 0 0 1px var(--line)}
.brand img{width:38px;height:38px;border-radius:50%;object-fit:cover;flex:none}
.about-photo{width:100%;max-width:280px;aspect-ratio:1;object-fit:cover;border-radius:10px;margin-bottom:28px;display:block}
@media (max-width:760px){.hero-grid{grid-template-columns:1fr;gap:28px}.portrait{width:140px;height:140px;order:-1}}