:root{
  --bg:#f6f7f9; --bg2:#ffffff; --text:#0f172a; --muted:#566074; --faint:#8a93a6;
  --line:#e2e6ee; --card:#ffffff; --chip:#eef1f6;
  --accent:#0d9488; --accent2:#2563eb; --accent-ink:#ffffff; --accent-soft:rgba(13,148,136,.10);
  --glow:rgba(13,148,136,.16); --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px rgba(15,23,42,.06);
  --term:#0a0f1c; --term-text:#cbd5e1;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
:root[data-theme="dark"]{
  --bg:#080c16; --bg2:#0d1322; --text:#e8ecf5; --muted:#9aa5bc; --faint:#6b7690;
  --line:#1b2540; --card:#0f1626; --chip:#152038;
  --accent:#2dd4bf; --accent2:#60a5fa; --accent-ink:#04121a; --accent-soft:rgba(45,212,191,.10);
  --glow:rgba(45,212,191,.14); --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
  --term:#050810; --term-text:#cbd5e1;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#080c16; --bg2:#0d1322; --text:#e8ecf5; --muted:#9aa5bc; --faint:#6b7690;
    --line:#1b2540; --card:#0f1626; --chip:#152038;
    --accent:#2dd4bf; --accent2:#60a5fa; --accent-ink:#04121a; --accent-soft:rgba(45,212,191,.10);
    --glow:rgba(45,212,191,.14); --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
    --term:#050810; --term-text:#cbd5e1;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%}
.wrap{width:100%;max-width:1040px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}
::selection{background:var(--accent);color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.scrolled{border-bottom-color:var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-family:var(--mono);font-weight:600;font-size:15px;display:flex;align-items:center;gap:10px}
.brand i{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;color:var(--accent-ink);font-style:normal;font-size:12px;font-weight:700}
.links{display:flex;align-items:center;gap:6px}
.links a{padding:8px 12px;border-radius:8px;font-size:14px;color:var(--muted);font-weight:500;transition:color .15s,background .15s}
.links a:hover,.links a.active{color:var(--text);background:var(--accent-soft)}
.tools{display:flex;align-items:center;gap:8px}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--text);display:grid;place-items:center;cursor:pointer;font:inherit}
.icon-btn:hover{border-color:var(--accent)}
.icon-btn svg{width:18px;height:18px}
.menu-btn{display:none}
.sun{display:none}
:root[data-theme="dark"] .sun{display:block}
:root[data-theme="dark"] .moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .sun{display:block}:root:not([data-theme="light"]) .moon{display:none}}
@media(max-width:760px){
  .menu-btn{display:grid}
  .links{position:absolute;left:0;right:0;top:64px;flex-direction:column;align-items:stretch;gap:2px;padding:10px 16px 16px;background:var(--bg);border-bottom:1px solid var(--line);display:none}
  .links.open{display:flex}
  .links a{padding:12px;font-size:16px}
}

/* ---------- hero ---------- */
.hero{position:relative;padding:72px 0 40px}
.hero::before{content:"";position:absolute;inset:-120px 0 auto 0;height:620px;background:radial-gradient(60% 60% at 75% 20%,var(--glow),transparent 70%),radial-gradient(40% 50% at 10% 10%,rgba(37,99,235,.10),transparent 70%);pointer-events:none;z-index:-1}
.grid-bg{position:absolute;inset:0 0 auto 0;height:560px;z-index:-1;pointer-events:none;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;opacity:.45;-webkit-mask-image:radial-gradient(70% 70% at 50% 0%,#000,transparent);mask-image:radial-gradient(70% 70% at 50% 0%,#000,transparent)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:36px}.hero{padding-top:44px}}
.status{display:inline-flex;align-items:center;gap:10px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:var(--card);font-size:13px;color:var(--muted)}
.dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 0 rgba(34,197,94,.6);animation:pulse 2.4s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
h1,h2{text-wrap:balance}
h1{font-size:clamp(2.5rem,6.4vw,4.4rem);line-height:1.04;letter-spacing:-.035em;font-weight:800;margin:22px 0 18px}
h1 .grad{background:linear-gradient(100deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{font-size:clamp(1.05rem,2.2vw,1.25rem);color:var(--muted);max-width:560px;margin:0 0 30px}
.sub b{color:var(--text);font-weight:600}
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:12px;font-weight:600;font-size:15px;border:1px solid var(--line);background:var(--card);color:var(--text);transition:transform .15s,border-color .15s,box-shadow .15s;cursor:pointer}
.btn:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border-color:transparent;color:var(--accent-ink)}
.btn svg{width:16px;height:16px}

/* terminal card */
.term{background:var(--term);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.term-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.07)}
.term-bar span{width:11px;height:11px;border-radius:50%;background:#334155}
.term-bar span:nth-child(1){background:#ef4444}.term-bar span:nth-child(2){background:#f59e0b}.term-bar span:nth-child(3){background:#22c55e}
.term-bar em{margin-left:auto;font:normal 12px var(--mono);color:#64748b}
.term pre{margin:0;padding:18px 20px 22px;font:13px/1.8 var(--mono);color:var(--term-text);overflow-x:auto;white-space:pre}
.term .p{color:#2dd4bf}.term .k{color:#64748b}.term .v{color:#f8fafc;font-weight:600}.term .ok{color:#4ade80}
.cursor{display:inline-block;width:8px;height:15px;background:#2dd4bf;vertical-align:-2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:56px}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr);margin-top:40px}}
.stat{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--card)}
.stat b{display:block;font-size:clamp(1.9rem,4vw,2.5rem);line-height:1;letter-spacing:-.03em;font-weight:800}
.stat b sup{font-size:.55em;color:var(--accent);vertical-align:top;margin-left:2px}
.stat span{display:block;margin-top:8px;font-size:13px;color:var(--muted)}

/* ---------- sections ---------- */
section{padding:84px 0}
.kicker{font:500 13px var(--mono);color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin:0 0 10px}
h2{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.12;letter-spacing:-.03em;font-weight:800;margin:0 0 14px}
.lede{color:var(--muted);max-width:640px;margin:0 0 44px;font-size:1.05rem}
@media(max-width:700px){section{padding:60px 0}}

/* about */
.about{display:grid;grid-template-columns:1.2fr .8fr;gap:48px}
@media(max-width:860px){.about{grid-template-columns:1fr;gap:28px}}
.about p{color:var(--muted);margin:0 0 16px;font-size:1.05rem}
.about p b{color:var(--text);font-weight:600}
.facts{display:grid;gap:12px;align-content:start}
.fact{display:flex;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.fact svg{flex:none;width:20px;height:20px;color:var(--accent);margin-top:3px}
.fact b{display:block;font-size:15px}
.fact span{font-size:14px;color:var(--muted)}

/* featured work */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:940px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.cards{grid-template-columns:1fr}}
.card{position:relative;display:flex;flex-direction:column;padding:24px;border:1px solid var(--line);border-radius:18px;background:var(--card);transition:transform .2s,border-color .2s,box-shadow .2s;overflow:hidden}
.card::after{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:0;transition:opacity .2s}
.card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 50%,var(--line));box-shadow:var(--shadow)}
.card:hover::after{opacity:1}
.card .ico{width:42px;height:42px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin-bottom:18px}
.card .ico svg{width:22px;height:22px}
.card h3{margin:0 0 8px;font-size:1.1rem;letter-spacing:-.01em}
.card p{margin:0 0 18px;color:var(--muted);font-size:.95rem;flex:1}
.metric{font:600 13px var(--mono);color:var(--accent);margin-bottom:14px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font:500 12px var(--mono);padding:3px 9px;border-radius:7px;background:var(--chip);color:var(--muted)}

/* timeline */
.tl{position:relative;display:grid;gap:22px;padding-left:28px}
.tl::before{content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--accent),var(--line) 70%)}
.job{position:relative;border:1px solid var(--line);border-radius:18px;background:var(--card);padding:6px}
.job::before{content:"";position:absolute;left:-28px;top:30px;width:14px;height:14px;border-radius:50%;background:var(--bg);border:3px solid var(--accent)}
.job.now::before{background:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}
.job summary{list-style:none;cursor:pointer;display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:space-between;align-items:flex-start;padding:18px 20px;border-radius:14px}
.job summary::-webkit-details-marker{display:none}
.job summary:hover{background:var(--accent-soft)}
.job h3{margin:0;font-size:1.08rem;letter-spacing:-.01em}
.job .org{color:var(--muted);font-size:14px;margin-top:2px}
.job .org b{color:var(--accent);font-weight:600}
.job .when{font:500 13px var(--mono);color:var(--faint);white-space:nowrap;display:flex;align-items:center;gap:10px}
.chev{width:16px;height:16px;transition:transform .2s}
.job[open] .chev{transform:rotate(180deg)}
.job .body{padding:2px 22px 20px}
.job ul{margin:0;padding-left:18px}
.job li{margin:8px 0;color:var(--muted);font-size:.95rem}
.job li::marker{color:var(--accent)}
.job li b{color:var(--text);font-weight:600}
@media(max-width:560px){.tl{padding-left:22px}.job::before{left:-22px}.job summary{padding:16px}.job .body{padding:0 16px 16px}}

/* skills */
.skills{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(max-width:760px){.skills{grid-template-columns:1fr}}
.skill{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--card)}
.skill h3{margin:0 0 14px;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-family:var(--mono);font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:7px}
.chip{padding:5px 11px;border-radius:9px;background:var(--chip);font-size:13px;font-weight:500;border:1px solid transparent;transition:border-color .15s,transform .15s}
.chip:hover{border-color:var(--accent);transform:translateY(-1px)}

/* certs */
.certs{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.cert{display:flex;align-items:center;gap:12px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--card);font-size:14px;font-weight:600}
.cert svg{flex:none;width:20px;height:20px;color:var(--accent)}
.cert.hero-cert{grid-column:1/-1;background:linear-gradient(135deg,var(--accent-soft),transparent);border-color:color-mix(in srgb,var(--accent) 40%,var(--line));font-size:16px;padding:18px 20px}
.cert.hero-cert small{display:block;font-weight:400;color:var(--muted);font-size:13px}

/* writing + edu */
.two{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
@media(max-width:800px){.two{grid-template-columns:1fr}}
.panel{padding:28px;border:1px solid var(--line);border-radius:18px;background:var(--card)}
.panel h3{margin:0 0 8px;font-size:1.15rem}
.panel p{margin:0 0 18px;color:var(--muted)}
.link{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--accent)}
.link:hover{gap:10px}
.link{transition:gap .15s}

/* contact */
.cta{text-align:center;padding:64px 28px;border:1px solid var(--line);border-radius:24px;background:radial-gradient(60% 90% at 50% 0%,var(--glow),transparent 70%),var(--card)}
.cta h2{margin-bottom:12px}
.cta p{color:var(--muted);max-width:520px;margin:0 auto 28px}
.cta .btns{justify-content:center}
footer{padding:36px 0 56px;color:var(--faint);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between}

/* reveal on scroll (only when JS is running) */
.js .rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.js .rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .rv{opacity:1;transform:none;transition:none}
  .dot,.cursor{animation:none}
}

/* ---------- writing: index + posts ---------- */
.page-head{padding:64px 0 24px}
.page-head p{color:var(--muted);max-width:620px;font-size:1.1rem;margin:0}
.crumbs{font:500 13px var(--mono);color:var(--faint);margin-bottom:18px}
.crumbs a{color:var(--accent)}
.crumbs a:hover{text-decoration:underline}
.posts{display:grid;gap:16px;padding-bottom:40px}
.post-card{display:block;padding:26px;border:1px solid var(--line);border-radius:18px;background:var(--card);transition:transform .2s,border-color .2s,box-shadow .2s}
.post-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 50%,var(--line));box-shadow:var(--shadow)}
.post-card .meta{font:500 12px var(--mono);color:var(--faint);margin-bottom:10px;display:flex;gap:12px;flex-wrap:wrap}
.post-card h3{margin:0 0 8px;font-size:1.25rem;letter-spacing:-.015em}
.post-card p{margin:0 0 14px;color:var(--muted)}
.post-card .go{font-weight:600;color:var(--accent)}
.article{max-width:720px;margin:0 auto;padding:56px 24px 40px}
.article .crumbs{margin-bottom:22px}
.article h1{font-size:clamp(2rem,5vw,3rem);margin:0 0 14px}
.article .byline{font:500 13px var(--mono);color:var(--faint);margin:0 0 36px;display:flex;gap:14px;flex-wrap:wrap}
.article .intro{font-size:1.2rem;color:var(--muted);margin:0 0 36px;line-height:1.6}
.prose h2{font-size:1.55rem;margin:48px 0 14px;letter-spacing:-.02em;scroll-margin-top:84px}
.prose h3{font-size:1.15rem;margin:30px 0 8px;letter-spacing:-.01em}
.prose p,.prose li{color:var(--muted);font-size:1.04rem}
.prose p{margin:0 0 16px}
.prose strong{color:var(--text);font-weight:600}
.prose ul,.prose ol{padding-left:22px;margin:0 0 18px}
.prose li{margin:7px 0}
.prose li::marker{color:var(--accent)}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.prose code{font:.88em var(--mono);background:var(--chip);padding:2px 6px;border-radius:6px;color:var(--text)}
.prose pre{background:var(--term);color:var(--term-text);border:1px solid var(--line);border-radius:14px;padding:18px 20px;overflow-x:auto;margin:0 0 22px;font:13px/1.7 var(--mono)}
.prose pre code{background:none;padding:0;color:inherit;font-size:inherit}
.prose table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:.95rem;display:block;overflow-x:auto}
.prose th,.prose td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{font:600 12px var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}
.prose td{color:var(--muted)}
.prose td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.callout{border-left:3px solid var(--accent);background:var(--accent-soft);padding:14px 18px;border-radius:0 12px 12px 0;margin:0 0 22px}
.callout p{margin:0;color:var(--text);font-size:1rem}
.toc{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:18px 22px;margin:0 0 12px}
.toc b{font:600 12px var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}
.toc ol{margin:10px 0 0;padding-left:20px}
.toc li{margin:4px 0;font-size:.95rem}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--accent)}
.post-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;max-width:720px;margin:0 auto;padding:24px 24px 64px;border-top:1px solid var(--line)}
.post-nav a{color:var(--accent);font-weight:600}

/* writing index filters */
.filters{display:grid;gap:14px;margin:8px 0 26px}
.search{width:100%;max-width:420px;padding:12px 16px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--text);font:inherit}
.search:focus{outline:2px solid var(--accent);outline-offset:2px}
.chiprow{display:flex;flex-wrap:wrap;gap:8px}
.fchip{padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--muted);font:500 13px var(--sans);cursor:pointer}
.fchip span{font-family:var(--mono);color:var(--faint);margin-left:4px}
.fchip:hover{border-color:var(--accent);color:var(--text)}
.fchip.active{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.fchip.active span{color:inherit;opacity:.8}
.post-card[hidden],.empty[hidden]{display:none}
.empty{color:var(--muted)}
@media(min-width:760px){.posts{grid-template-columns:repeat(2,1fr)}}

/* long inline code and words must wrap on narrow screens */
.prose code{overflow-wrap:anywhere}
.prose pre code{overflow-wrap:normal}
.prose p,.prose li,.prose td{overflow-wrap:break-word}