:root{
  --bg:#f6f8fc; --surface:#ffffff; --surface-2:#eef2f8;
  --text:#0c1424; --muted:#59627a; --border:rgba(12,20,36,.12);
  --accent:#2f6df6; --accent-2:#0e9bb5; --gold:#c98a2e;
  --grad:linear-gradient(100deg,#2f6df6,#22c3d6);
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --maxw:1080px;
}
:root[data-theme="dark"]{
  --bg:#0b1220; --surface:#111b30; --surface-2:#0e1626;
  --text:#eaf0fb; --muted:#9aa6bd; --border:rgba(255,255,255,.11);
  --accent:#5b9dff; --accent-2:#4fd6e6; --gold:#e0b25a;
  --grad:linear-gradient(100deg,#5b9dff,#4fd6e6);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,5vw,40px)}
.eyebrow{font-family:var(--mono);text-transform:uppercase;letter-spacing:.2em;font-size:.72rem;color:var(--muted)}
.eyebrow b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:700}
h2.section-title{font-size:clamp(1.8rem,3.6vw,2.7rem);font-weight:800;letter-spacing:-.02em;margin:.5rem 0 0;text-wrap:balance}

/* ---------- header ---------- */
nav{position:fixed;inset:0 0 auto 0;z-index:50;background:transparent;border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s}
nav.scrolled{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);box-shadow:0 4px 24px -18px rgba(0,0,0,.5)}
nav.on-hero:not(.scrolled) .brand,nav.on-hero:not(.scrolled) .nav-links a{color:rgba(255,255,255,.92)}
nav.on-hero:not(.scrolled) .toggle{color:#fff;border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.08)}
nav.on-hero:not(.scrolled) .nav-links a.active{color:#fff}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:14px clamp(20px,5vw,40px);display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-family:var(--mono);font-weight:600;letter-spacing:.02em;text-decoration:none;display:flex;align-items:center;gap:9px;font-size:.92rem;transition:color .3s}
.brand .dot{width:11px;height:11px;border-radius:3px;background:var(--grad)}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{position:relative;font-family:var(--mono);font-size:.78rem;text-decoration:none;color:var(--muted);letter-spacing:.03em;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-7px;height:2px;background:var(--grad);border-radius:2px}
.toggle{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;background:var(--surface);
  border:1px solid var(--border);color:var(--text);border-radius:999px;padding:7px 12px;cursor:pointer;display:flex;align-items:center;gap:7px;transition:.2s}
.toggle:hover{border-color:var(--accent)}
@media(max-width:720px){.nav-links a{display:none}}

/* ---------- hero: full responsive image (whole photo, no crop) ---------- */
header.hero{position:relative;background:#0b1220;color:#fff}
.hero-media{position:relative;line-height:0}
.hero-media picture{display:block}
.hero-img{display:block;width:100%;height:auto}
.hero-scrim{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg, rgba(6,10,20,.42) 0%, transparent 18%, transparent 52%, rgba(6,10,20,.5) 76%, rgba(6,10,20,.9) 100%)}
.hero-loc{position:absolute;right:clamp(16px,5vw,40px);bottom:14px;z-index:3;display:flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.85);text-shadow:0 1px 12px rgba(0,0,0,.7)}
.hero-loc svg{width:12px;height:12px;fill:currentColor;opacity:.9}
.hero-inner{position:absolute;left:0;right:0;bottom:0;z-index:3;width:100%;max-width:var(--maxw);margin:0 auto;
  padding:0 clamp(20px,5vw,40px) clamp(26px,3.5vw,54px);line-height:1.65}
.hero-copy{max-width:640px}
.hero-copy .eyebrow{color:rgba(220,232,255,.9)}
.hero-copy .eyebrow b{color:#7fd7e6;-webkit-text-fill-color:#7fd7e6}
h1{font-size:clamp(2.1rem,4.6vw,4.2rem);line-height:1.0;font-weight:800;letter-spacing:-.03em;margin:10px 0 0;color:#fff;text-wrap:balance;text-shadow:0 2px 40px rgba(0,0,0,.6)}
h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-role{margin:12px 0 0;font-size:clamp(1.02rem,2.1vw,1.55rem);font-weight:600;color:#eaf1ff;min-height:1.5em;text-shadow:0 1px 20px rgba(0,0,0,.65)}
.rotator{color:#6fd0e6}
.caret{display:inline-block;margin-left:1px;color:#6fd0e6;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.btn{font-family:var(--mono);font-size:.82rem;text-decoration:none;padding:11px 18px;border-radius:11px;display:inline-flex;align-items:center;gap:9px;border:1px solid transparent;transition:transform .18s,box-shadow .2s,border-color .2s}
.btn.primary{background:var(--grad);color:#04121f;font-weight:700;box-shadow:0 12px 30px -12px #2f6df6}
.btn.primary:hover{transform:translateY(-2px)}
.btn.ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn.ghost:hover{border-color:#fff;transform:translateY(-2px)}
.hero-social{display:flex;gap:12px;margin-top:20px}
.hero-social a{width:38px;height:38px;border:1px solid rgba(255,255,255,.3);border-radius:11px;display:grid;place-items:center;color:rgba(255,255,255,.9);transition:.2s}
.hero-social a:hover{border-color:#fff;color:#fff;transform:translateY(-2px)}
.hero-social svg{width:18px;height:18px;fill:currentColor}
@media(max-width:720px){
  .hero-inner{position:static;background:#0b1220;padding:22px clamp(20px,6vw,26px) 32px}
  .hero-scrim{background:linear-gradient(180deg, rgba(6,10,20,.42) 0%, transparent 36%, transparent 100%)}
  .hero-copy{max-width:none}
  .hero-loc{bottom:10px}
}

/* ---------- sections ---------- */
section{padding:clamp(64px,10vw,120px) 0}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .caret,.scrollcue{animation:none}
}

.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:clamp(30px,6vw,64px);align-items:start;margin-top:36px}
.about-grid p{color:var(--muted);font-size:1.04rem;max-width:60ch}
.about-grid p strong{color:var(--text);font-weight:600}
.idxcard{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden}
.idxcard .row{display:flex;justify-content:space-between;gap:18px;align-items:baseline;padding:15px 20px;border-bottom:1px solid var(--border)}
.idxcard .row:last-child{border-bottom:0}
.idxcard .k{font-family:var(--mono);font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}
.idxcard .v{text-align:right;font-weight:600;font-size:.96rem}
.idxcard .v small{display:block;font-weight:400;color:var(--muted);font-size:.8rem;font-family:var(--mono)}
@media(max-width:820px){.about-grid{grid-template-columns:1fr}}

.timeline{margin-top:44px;position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(#2f6df6,#22c3d6)}
.tl-item{position:relative;padding:0 0 40px 8px}.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-32px;top:5px;width:16px;height:16px;border-radius:50%;background:var(--bg);
  border:3px solid var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 20%,transparent)}
.tl-when{font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;color:var(--accent)}
.tl-role{font-size:1.24rem;font-weight:700;margin:5px 0 2px}
.tl-org{color:var(--muted);font-family:var(--mono);font-size:.86rem}
.tl-desc{color:var(--muted);margin:10px 0 0;max-width:58ch}

.res-lead{color:var(--muted);font-size:1.04rem;max-width:66ch;margin:26px 0 0}
.res-lead strong{color:var(--text)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 0}
.chip{font-family:var(--mono);font-size:.75rem;letter-spacing:.03em;padding:8px 14px;border-radius:999px;
  border:1px solid var(--border);background:var(--surface);color:var(--muted);transition:color .2s,border-color .2s}
.chip:hover{color:var(--text);border-color:var(--accent)}

.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin-top:36px}
.skill-group{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:22px}
.skill-group .sg-k{font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin-bottom:14px}
.sg-items{display:flex;flex-wrap:wrap;gap:8px}
.sg-items span{font-family:var(--mono);font-size:.76rem;padding:6px 11px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);transition:border-color .2s,transform .15s}
.sg-items span:hover{border-color:var(--accent);transform:translateY(-1px)}
.sg-items span.key{background:var(--grad);color:#04121f;border-color:transparent;font-weight:700}

.pubs{margin-top:42px;border-top:1px solid var(--border)}
.pub{display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:baseline;padding:20px 0;border-bottom:1px solid var(--border);text-decoration:none}
.pub .idx{font-family:var(--mono);color:var(--muted);font-size:.82rem;font-variant-numeric:tabular-nums}
.pub .t{font-weight:600;line-height:1.35}
.pub .v{font-family:var(--mono);font-size:.78rem;color:var(--muted);margin-top:6px;display:block}
.pub .yr{font-family:var(--mono);color:var(--accent);font-size:.85rem;font-variant-numeric:tabular-nums}
.pub:hover .t{color:var(--accent)}
@media(max-width:640px){.pub{grid-template-columns:auto 1fr}.pub .yr{display:none}}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:40px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:26px;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:var(--accent-2)}
.card .k{font-family:var(--mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent-2)}
.card h3{margin:12px 0 8px;font-size:1.2rem}
.card p{color:var(--muted);margin:0;font-size:.96rem}
.card a{color:var(--accent);font-family:var(--mono);font-size:.8rem;text-decoration:none;display:inline-block;margin-top:14px}
.card a:hover{text-decoration:underline}

.hob{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin-top:36px}
.hob div{border:1px solid var(--border);border-radius:16px;padding:24px;background:var(--surface);transition:transform .2s,border-color .2s}
.hob div:hover{transform:translateY(-4px);border-color:var(--accent-2)}
.hob .h-k{font-size:1.7rem;line-height:1}.hob h4{margin:14px 0 6px;font-size:1.06rem}
.hob p{color:var(--muted);margin:0;font-size:.92rem}
.hob .medal{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);margin-top:10px}

.contact{text-align:center}
.contact h2{font-size:clamp(2rem,5.5vw,3.2rem);font-weight:800;letter-spacing:-.02em}
.contact .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.social{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px}
footer{border-top:1px solid var(--border);padding:30px 0;text-align:center;font-family:var(--mono);font-size:.74rem;color:var(--muted)}