*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#1a2130; --bg2:#222b3c; --line:rgba(255,255,255,.1);
  --accent:#5b9dff; --accent-dim:rgba(91,157,255,.16);
  --text:#eef2f8; --muted:#b0bccc; --faint:#8593a6;
  --card:rgba(255,255,255,.045); --card-hi:rgba(255,255,255,.075);
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --display:'Outfit',Inter,system-ui,sans-serif;
  --max:1040px;
  --pc:#5b9dff; --pc-dim:rgba(91,157,255,.16);
}
body[data-page=about]{--pc:#4ade80;--pc-dim:rgba(74,222,128,0.16)}
body[data-page=research]{--pc:#a78bfa;--pc-dim:rgba(167,139,250,0.16)}
body[data-page=experience]{--pc:#5b9dff;--pc-dim:rgba(91,157,255,0.16)}
body[data-page=skills]{--pc:#2dd4bf;--pc-dim:rgba(45,212,191,0.16)}
body[data-page=projects]{--pc:#f5b544;--pc-dim:rgba(245,181,68,0.16)}
body[data-page=contact]{--pc:#f472b6;--pc-dim:rgba(244,114,182,0.16)}

html{-webkit-text-size-adjust:100%}
body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg);
  color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 500px at 8% -10%, rgba(91,157,255,.16), transparent 60%),
    radial-gradient(700px 420px at 96% 4%, rgba(167,139,250,.14), transparent 60%),
    radial-gradient(800px 500px at 50% 110%, rgba(45,212,191,.09), transparent 60%);
  background-attachment:fixed}
a{color:inherit}
::selection{background:var(--accent-dim);color:#fff}
.ic{width:1.05em;height:1.05em;vertical-align:-.18em;flex-shrink:0}

.wrap{max-width:var(--max);margin:0 auto;padding:0 1.5rem}

/* nav */
nav{position:sticky;top:0;z-index:50;background:rgba(26,33,48,.82);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--max);margin:0 auto;padding:.8rem 1.5rem;
  display:flex;align-items:center;justify-content:space-between;gap:1rem}
.nav-logo{font-family:var(--display);font-weight:700;letter-spacing:-.02em;font-size:1.08rem;
  text-decoration:none;display:inline-flex;align-items:center;gap:.5rem}
.nav-logo i{width:10px;height:10px;border-radius:50%;
  background:linear-gradient(135deg,#5b9dff,#a78bfa,#2dd4bf)}
.nav-links{display:flex;gap:.25rem;list-style:none;flex-wrap:wrap}
.nav-links a{display:inline-flex;align-items:center;gap:.45rem;color:var(--muted);
  text-decoration:none;font-size:.95rem;font-weight:600;padding:.48rem .85rem;
  border-radius:8px;transition:color .15s,background .15s}
.nav-links a .ic{color:var(--h)}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--text);background:var(--card)}
.nav-links a[aria-current=page]{color:var(--h);background:color-mix(in srgb,var(--h) 16%,transparent)}

/* hero */
#hero{padding:5rem 0 4rem;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1fr auto;gap:3rem;align-items:center}
.portrait{width:250px;height:250px;border-radius:22px;object-fit:cover;
  border:1px solid var(--line);background:var(--card);flex-shrink:0;
  box-shadow:0 18px 50px rgba(0,0,0,.4),0 0 0 6px rgba(91,157,255,.12)}
@media(max-width:760px){
  .hero-grid{grid-template-columns:1fr;gap:1.75rem}
  .portrait{width:160px;height:160px;order:-1}
}
.eyebrow{font-family:var(--mono);font-size:.76rem;color:var(--accent);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:1rem;
  display:inline-flex;align-items:center;gap:.45rem}
h1{font-family:var(--display);font-size:clamp(2.3rem,6vw,3.6rem);line-height:1.08;letter-spacing:-.03em;
  font-weight:700;margin-bottom:.55rem}
.grad{background:linear-gradient(92deg,#5b9dff 0%,#a78bfa 50%,#2dd4bf 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.role{font-family:var(--display);font-size:clamp(1.25rem,2.8vw,1.6rem);color:var(--text);
  font-weight:600;margin-bottom:.35rem;letter-spacing:-.01em}
.job{font-size:1.02rem;color:var(--muted);font-weight:500;margin-bottom:1.5rem;
  display:inline-flex;align-items:center;gap:.5rem}
.lede{font-size:1.04rem;color:var(--muted);max-width:60ch;margin-bottom:1.1rem}
.lede:last-of-type{margin-bottom:2rem}
.cta{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.66rem 1.2rem;border-radius:9px;
  font-size:.9rem;font-weight:600;text-decoration:none;transition:.15s;
  border:1px solid transparent}
.btn-p{background:var(--accent);color:#08111f}
.btn-p:hover{background:#7cb0ff;transform:translateY(-1px)}
.btn-s{border-color:var(--line);color:var(--text);background:var(--card)}
.btn-s:hover{border-color:var(--accent);color:var(--accent)}
.mailline{font-family:var(--mono);font-size:.85rem;color:var(--muted);text-decoration:none;
  display:inline-flex;align-items:center;gap:.45rem}
.mailline:hover{color:var(--accent)}

/* sections */
section{padding:4.25rem 0;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:none}
.sec-label{font-family:var(--mono);font-size:.76rem;color:var(--pc);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:.6rem;
  display:inline-flex;align-items:center;gap:.45rem}
h2{font-family:var(--display);font-size:clamp(1.55rem,3.4vw,2.1rem);letter-spacing:-.025em;
  font-weight:700;margin-bottom:.75rem}
.sec-sub{color:var(--muted);max-width:62ch;margin-bottom:2.25rem}

/* standalone page header */
.page-head{padding:3.5rem 0 2.25rem;border-bottom:1px solid var(--line);position:relative}
.page-head::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--pc),transparent 60%)}
.page-head h1{font-size:clamp(1.9rem,4.4vw,2.7rem);line-height:1.12;margin-bottom:.75rem;max-width:22ch}
.page-head .sec-sub{margin-bottom:0}
.page{padding:3rem 0 4.5rem;border-bottom:none}

/* home map */
.map{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-top:2.5rem}
.map a{display:block;text-decoration:none;background:var(--card);border:1px solid var(--line);
  border-top:3px solid var(--h);border-radius:12px;padding:1.2rem 1.3rem;transition:.18s;position:relative}
.map a:hover,.map a:focus-visible{background:var(--card-hi);border-color:var(--h);
  border-top-color:var(--h);transform:translateY(-2px);outline:none}
.map a .tag{font-family:var(--mono);font-size:.7rem;color:var(--h);letter-spacing:.06em;
  text-transform:uppercase;margin-bottom:.5rem;display:inline-flex;align-items:center;gap:.4rem}
.map a h3{font-family:var(--display);font-size:1.02rem;font-weight:600;margin-bottom:.35rem;padding-right:1.4rem}
.map a p{color:var(--muted);font-size:.88rem}
.map a .ic.go{position:absolute;top:1.15rem;right:1.1rem;color:var(--faint);transition:.18s}
.map a:hover .ic.go{color:var(--h);transform:translateX(3px)}

/* research */
.paper{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--pc);
  border-radius:12px;padding:1.6rem;margin-bottom:1rem}
.paper h3{font-family:var(--display);font-size:1.2rem;font-weight:650;letter-spacing:-.015em;
  margin-bottom:.5rem;line-height:1.35}
.paper .meta{font-family:var(--mono);font-size:.76rem;color:var(--faint);margin-bottom:.9rem;
  display:flex;gap:.9rem;flex-wrap:wrap}
.paper .meta span{display:inline-flex;align-items:center;gap:.35rem}
.paper p{color:var(--muted);font-size:.94rem;margin-bottom:.9rem}
.paper p:last-of-type{margin-bottom:1.1rem}
.findings{list-style:none;margin:0 0 1.1rem;padding:0;display:grid;gap:.6rem}
.findings li{color:var(--muted);font-size:.9rem;padding-left:1.5rem;position:relative}
.findings li .ic{position:absolute;left:0;top:.2em;color:var(--pc)}
.findings strong{color:var(--text);font-weight:600}
.links{display:flex;gap:1.25rem;flex-wrap:wrap;font-size:.87rem}
.links a{color:var(--pc);text-decoration:none;font-weight:600;display:inline-flex;align-items:center;gap:.35rem}
.links a:hover{text-decoration:underline}
.cite{font-family:var(--mono);font-size:.74rem;color:var(--faint);
  background:rgba(0,0,0,.28);border:1px solid var(--line);border-radius:8px;
  padding:.75rem .9rem;margin-top:1.1rem;overflow-x:auto;line-height:1.6}

/* interactive demo */
.demo{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.5rem;margin-bottom:1rem}
.demo-head{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap;margin-bottom:.35rem}
.demo-head h3{font-family:var(--display);font-size:1.08rem;font-weight:650;display:inline-flex;align-items:center;gap:.5rem}
.demo-hint{font-size:.87rem;color:var(--muted);margin-bottom:1.25rem;max-width:64ch}
.demo-hint b{color:var(--text);font-weight:600}
.stage{display:grid;grid-template-columns:1fr 260px;gap:1.5rem;align-items:start}
@media(max-width:820px){.stage{grid-template-columns:1fr}}
.canvas{background:rgba(0,0,0,.26);border:1px solid var(--line);border-radius:10px;padding:.5rem;overflow-x:auto}
svg#g{display:block;width:100%;min-width:460px;height:auto}
.edge{stroke:var(--faint);stroke-width:1.6;fill:none;transition:stroke .25s,opacity .25s}
.edge.hot{stroke:#f26d64;stroke-width:2.2}
.edge.cut{stroke:var(--faint);stroke-dasharray:3 4;opacity:.35}
.edge-hit{stroke:transparent;stroke-width:14;fill:none;cursor:pointer}
.node{cursor:pointer}
.node rect{fill:#2a3448;stroke:var(--line);stroke-width:1.3;transition:.22s}
.node:hover rect{stroke:var(--pc)}
.node.pz rect{fill:#5c1f1c;stroke:#f26d64;stroke-width:2}
.node.hit rect{fill:#3a2220;stroke:#c9524a}
.node.ok-rec rect{stroke:#4ade80}
.node text{font-family:var(--mono);font-size:9.5px;fill:var(--text);pointer-events:none;dominant-baseline:middle}
.node .kind{font-size:7.5px;fill:var(--faint)}
.node .sig{font-size:8px}
.panel h4{font-family:var(--mono);font-size:.72rem;color:var(--faint);letter-spacing:.06em;text-transform:uppercase;margin-bottom:.6rem}
.readout{font-size:.86rem;color:var(--muted);margin-bottom:1rem;min-height:3.2em}
.readout b{color:var(--text);font-weight:600}
.verdicts{list-style:none;display:grid;gap:.3rem;margin-bottom:1.1rem}
.verdicts li{font-family:var(--mono);font-size:.73rem;display:flex;justify-content:space-between;gap:.5rem;color:var(--muted)}
.v-rec{color:#5ee69a}.v-blk{color:#f5b544}.v-unr{color:#f26d64}.v-pz{color:#f26d64}
.demo-ctl{display:flex;gap:.5rem;flex-wrap:wrap}
.mini{font-size:.76rem;padding:.35rem .75rem;border-radius:7px;cursor:pointer;
  background:transparent;border:1px solid var(--line);color:var(--muted);font-family:inherit;transition:.15s}
.mini:hover{border-color:var(--pc);color:var(--pc)}
.key{display:flex;gap:.9rem;flex-wrap:wrap;font-size:.72rem;color:var(--faint);margin-top:.9rem;font-family:var(--mono)}
.key i{font-style:normal;display:inline-flex;align-items:center;gap:.3rem}
.dot{width:8px;height:8px;border-radius:2px;display:inline-block}

/* experience */
.tabs{display:grid;grid-template-columns:250px 1fr;gap:2rem;align-items:start}
@media(max-width:760px){.tabs{grid-template-columns:1fr;gap:1.25rem}
  .tablist{display:flex;overflow-x:auto;gap:.4rem;border-left:none;border-bottom:1px solid var(--line);padding-bottom:.5rem}
  .tab{white-space:nowrap;border-left:none!important;border-bottom:2px solid transparent}
  .tab[aria-selected=true]{border-bottom-color:var(--pc)}}
.tablist{display:flex;flex-direction:column;gap:.15rem;border-left:1px solid var(--line)}
.tab{background:none;border:none;border-left:2px solid transparent;text-align:left;padding:.55rem .8rem;
  cursor:pointer;color:var(--muted);font:inherit;font-size:.9rem;transition:.15s;margin-left:-1px;
  display:flex;align-items:center;gap:.7rem}
.tab:hover{color:var(--text);background:var(--card)}
.tab[aria-selected=true]{color:var(--text);border-left-color:var(--pc);background:var(--card);font-weight:600}
.tab small{display:block;font-family:var(--mono);font-size:.68rem;color:var(--faint);margin-top:.1rem;font-weight:400}
.logo{width:36px;height:36px;border-radius:9px;display:inline-grid;place-items:center;flex-shrink:0;
  font-family:var(--display);font-weight:700;font-size:.85rem;letter-spacing:.02em;color:#fff;
  background:var(--lc,#5b9dff);box-shadow:inset 0 0 0 1px rgba(255,255,255,.14)}
.logo.lg{width:52px;height:52px;border-radius:12px;font-size:1.1rem}
.pane[hidden]{display:none}
.pane .job-top{display:flex;align-items:center;gap:.9rem;margin-bottom:.9rem;flex-wrap:wrap}
.pane h3{font-family:var(--display);font-size:1.12rem;font-weight:650}
.pane .org{color:var(--pc);font-size:.9rem;font-weight:500;display:flex;gap:.9rem;flex-wrap:wrap}
.pane .org span{display:inline-flex;align-items:center;gap:.35rem}
.pane .when{font-family:var(--mono);font-size:.76rem;color:var(--faint)}
.pane ul{list-style:none;display:grid;gap:.6rem;margin-top:.9rem}
.pane li{color:var(--muted);font-size:.92rem;padding-left:1.35rem;position:relative}
.pane li .ic{position:absolute;left:0;top:.22em;color:var(--pc);width:.95em;height:.95em}

/* reveal */
.rv{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* grids and cards */
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--cc,var(--pc));
  border-radius:12px;padding:1.35rem;transition:.18s}
.card:hover{background:var(--card-hi);border-color:var(--cc,var(--pc));transform:translateY(-2px)}
.card .tag{font-family:var(--mono);font-size:.7rem;color:var(--cc,var(--pc));letter-spacing:.06em;
  text-transform:uppercase;margin-bottom:.5rem;display:inline-flex;align-items:center;gap:.4rem}
.card h3{font-family:var(--display);font-size:1.05rem;font-weight:650;margin-bottom:.3rem}
.card .stack{font-family:var(--mono);font-size:.74rem;color:var(--faint);margin-bottom:.7rem}
.card p{color:var(--muted);font-size:.89rem}

/* skills */
.skills{display:grid;gap:1.1rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.skill{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1.15rem 1.2rem;
  border-top:3px solid var(--cc)}
.skill h4{font-family:var(--display);font-size:.98rem;font-weight:650;margin-bottom:.75rem;
  display:flex;align-items:center;gap:.5rem;color:var(--text)}
.skill h4 .ic{color:var(--cc)}
.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.chip{font-size:.8rem;padding:.28rem .65rem;border-radius:6px;background:rgba(0,0,0,.2);
  border:1px solid var(--line);color:var(--muted)}
.chip:hover{border-color:var(--cc);color:var(--text)}

/* about */
.about{display:grid;grid-template-columns:1.4fr .9fr;gap:2.5rem;align-items:start}
@media(max-width:820px){.about{grid-template-columns:1fr}}
.prose p{color:var(--muted);font-size:1rem;margin-bottom:1.05rem;max-width:62ch}
.prose p strong{color:var(--text);font-weight:600}
.facts{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--pc);border-radius:12px;padding:1.2rem 1.3rem}
.facts h3{font-family:var(--display);font-size:1rem;font-weight:650;margin-bottom:.9rem}
.facts dl{display:grid;gap:.8rem}
.facts dt{font-family:var(--mono);font-size:.68rem;color:var(--faint);letter-spacing:.06em;text-transform:uppercase;
  display:flex;align-items:center;gap:.4rem;margin-bottom:.15rem}
.facts dt .ic{color:var(--pc)}
.facts dd{font-size:.92rem;color:var(--text)}
.facts dd a{color:var(--pc);text-decoration:none}
.facts dd a:hover{text-decoration:underline}
.timeline{margin-top:2.75rem}
.timeline h3{font-family:var(--display);font-size:1.15rem;font-weight:650;margin-bottom:1.2rem;display:flex;align-items:center;gap:.5rem}
.tl{list-style:none;display:grid;gap:0;border-left:2px solid var(--line);margin-left:.6rem}
.tl li{position:relative;padding:0 0 1.3rem 1.6rem}
.tl li::before{content:"";position:absolute;left:-7px;top:.35rem;width:12px;height:12px;border-radius:50%;
  background:var(--tc);box-shadow:0 0 0 4px color-mix(in srgb,var(--tc) 22%,transparent)}
.tl .yr{font-family:var(--mono);font-size:.72rem;color:var(--faint);letter-spacing:.06em}
.tl .what{font-weight:600;color:var(--text);font-size:.96rem;display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.tl .what .logo{width:26px;height:26px;border-radius:7px;font-size:.66rem}
.tl .how{color:var(--muted);font-size:.88rem}

/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-bottom:2rem}
.clink{display:flex;align-items:center;gap:1rem;text-decoration:none;background:var(--card);border:1px solid var(--line);
  border-radius:12px;padding:1.1rem 1.2rem;transition:.18s}
.clink:hover{background:var(--card-hi);border-color:var(--pc);transform:translateY(-2px)}
.clink .badge{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;background:var(--pc-dim);color:var(--pc);flex-shrink:0}
.clink .badge .ic{width:1.35em;height:1.35em}
.clink b{display:block;font-family:var(--display);font-weight:650;font-size:.95rem}
.clink span{font-family:var(--mono);font-size:.78rem;color:var(--muted);word-break:break-all}
.bigmail{font-family:var(--display);font-size:clamp(1.3rem,3.4vw,2rem);font-weight:700;text-decoration:none;
  display:inline-flex;align-items:center;gap:.6rem;margin:.25rem 0 2rem;letter-spacing:-.01em}
.bigmail .ic{color:var(--pc);width:1.1em;height:1.1em}
.bigmail:hover{color:var(--pc)}

footer{padding:2rem 0;color:var(--faint);font-size:.83rem;border-top:1px solid var(--line)}
.footer-in{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
.footer-in .who{display:flex;flex-direction:column;gap:.25rem}
.footer-in .who a{color:var(--muted);text-decoration:none;font-family:var(--mono);font-size:.8rem;display:inline-flex;align-items:center;gap:.4rem}
.footer-in .who a:hover{color:var(--accent)}
.footer-links{display:flex;gap:.9rem;list-style:none;flex-wrap:wrap}
.footer-links a{color:var(--muted);text-decoration:none;font-size:.83rem;display:inline-flex;align-items:center;gap:.35rem}
.footer-links a:hover{color:var(--text)}
.footer-links a .ic{color:var(--h)}

@media(max-width:640px){
  .nav-links{gap:.1rem}
  .nav-links a{padding:.4rem .55rem;font-size:.86rem}
  .nav-links a .ic{display:none}
  #hero{padding:3.5rem 0 3rem}
  section{padding:3.25rem 0}
}