/* Concept: a test log you can read — calm paper, blue-black ink, PASS marks in signal green; mono labels carry the engineering voice */
:root{
  --bg:#F6F5F1; --surface:#FFFFFF; --ink:#141A24; --muted:#5B6372; --line:#E2E0D8;
  --accent:#1F5FBF; --accent-soft:#E6EEFA; --ok:#1E7A4C; --ok-soft:#E1F1E8;
  --f-display:"Bricolage Grotesque","Noto Sans TC",system-ui,sans-serif;
  --f-body:"Noto Sans TC","Microsoft JhengHei",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",Consolas,monospace;
  --wrap:1040px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#12161D; --surface:#1A1F28; --ink:#E9ECF2; --muted:#9BA3B3; --line:#2C3340;
  --accent:#7FAAF0; --accent-soft:#1E2B42; --ok:#6CCB97; --ok-soft:#183126; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#12161D; --surface:#1A1F28; --ink:#E9ECF2; --muted:#9BA3B3; --line:#2C3340;
  --accent:#7FAAF0; --accent-soft:#1E2B42; --ok:#6CCB97; --ok-soft:#183126; color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:3px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:max(20px,env(safe-area-inset-left,0px))}
.mono{font-family:var(--f-mono)}
.dim{color:var(--muted)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--bg);padding:6px 10px;border-radius:4px;z-index:20}
.skip:focus{left:12px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}

/* language */
html[lang="zh-Hant"] [data-en]{display:none}
html[lang="en"] [data-zh]{display:none}
html[lang="en"] h3 .sub[data-en]{display:none} /* project subtitle only for zh view */

/* top bar */
.bar{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top,0px)}
.bar-in{display:flex;align-items:center;gap:20px;height:56px}
.brand{display:inline-flex;align-items:baseline;gap:8px;font-family:var(--f-body);font-weight:700;font-size:18px;color:var(--ink);text-decoration:none;letter-spacing:.04em;white-space:nowrap}
.brand small{font-family:var(--f-mono);font-weight:500;font-size:12px;color:var(--accent);letter-spacing:0}
.nav{display:flex;gap:18px;margin-left:auto;font-size:14.5px}
.nav a{color:var(--muted);text-decoration:none}
.nav a:hover{color:var(--ink)}
.lang{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.lang button{font:500 12.5px var(--f-mono);background:none;border:0;color:var(--muted);padding:5px 9px;cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
@media (max-width:640px){.nav{display:none}.lang{margin-left:auto}}

/* hero */
.hero{padding-block:72px 40px;display:grid;gap:18px}
.eyebrow{margin:0;font-size:13px;color:var(--ok);display:flex;align-items:center;gap:10px}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 var(--ok);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--ok) 50%,transparent)}70%{box-shadow:0 0 0 8px transparent}100%{box-shadow:0 0 0 0 transparent}}
h1{margin:0;font-family:var(--f-display);font-weight:800;font-size:clamp(40px,7vw,76px);line-height:1.05;letter-spacing:-.01em;text-wrap:balance}
h1 .en-name{display:block;font-size:.42em;font-weight:600;color:var(--muted);letter-spacing:0;margin-top:10px}
.role{margin:0;font-size:clamp(17px,2.2vw,21px);font-weight:700;color:var(--accent)}
.lede{margin:0;max-width:62ch;color:var(--ink);font-size:17px}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.btn{display:inline-flex;align-items:center;padding:10px 18px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none;font-weight:500;font-size:15px}
.btn:hover{border-color:var(--ink)}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.readout{margin:28px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.readout>div{padding:18px 20px 16px 0;display:grid;gap:4px;min-width:0}
.readout>div+div{padding-left:20px;border-left:1px solid var(--line)}
.readout dt{font-size:12px;color:var(--muted);text-transform:lowercase}
.readout dd{margin:0;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;font-family:var(--f-display);font-variant-numeric:tabular-nums}
.readout dd b{font-size:clamp(26px,3.6vw,36px);font-weight:800}
.readout dd i{font-style:normal;font-family:var(--f-mono);font-size:13px;color:var(--muted)}
.readout dd i.ok{color:var(--ok)}
.readout p{margin:0;font-size:13.5px;color:var(--muted)}
@media (max-width:720px){.readout{grid-template-columns:1fr}.readout>div+div{padding-left:0;border-left:0;border-top:1px solid var(--line)}}

/* sections */
.block{padding-block:56px 8px}
h2{display:flex;align-items:baseline;gap:14px;margin:0 0 26px;font-family:var(--f-display);font-weight:800;font-size:clamp(26px,3.4vw,34px)}
h2 .num{font-size:13px;color:var(--accent);font-weight:500}
h3{margin:0;font-size:18px;line-height:1.45}

/* projects */
.project{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:24px 26px;display:grid;gap:14px}
.project+.project{margin-top:18px}
.p-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 16px;align-items:baseline}
.p-head .sub{display:block;font-family:var(--f-mono);font-size:12.5px;color:var(--muted);font-weight:400}
.when{font-size:12.5px;color:var(--muted);white-space:nowrap}
.pitch{margin:0;font-weight:500;max-width:70ch}
.log{list-style:none;margin:0;padding:12px 14px;background:var(--bg);border:1px solid var(--line);border-radius:8px;display:grid;gap:8px;font-size:14.5px}
.log li{display:grid;grid-template-columns:44px minmax(0,1fr);gap:10px;align-items:baseline}
.log .mono{font-size:11.5px;letter-spacing:.06em}
.log .ok{color:var(--ok);font-weight:500}
.p-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px}
.tags{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.tags li{font-size:12.5px;background:var(--accent-soft);color:var(--accent);padding:2px 9px;border-radius:5px}
.links{display:flex;gap:16px;font-family:var(--f-mono);font-size:14px}

/* timeline */
.timeline{list-style:none;margin:0;padding:0;display:grid}
.timeline>li{display:grid;grid-template-columns:170px minmax(0,1fr);gap:20px;padding-block:20px;border-top:1px solid var(--line)}
.timeline>li:last-child{border-bottom:1px solid var(--line)}
.t-meta{font-size:13px;color:var(--muted);padding-top:3px;font-variant-numeric:tabular-nums}
.t-body{display:grid;gap:6px;min-width:0}
.org{margin:0;color:var(--muted);font-size:14.5px}
.t-body ul{margin:4px 0 0;padding-left:18px;display:grid;gap:4px;font-size:15px}
@media (max-width:640px){.timeline>li{grid-template-columns:1fr;gap:4px}}

/* skills */
.skills{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 28px}
.skills>div{display:grid;gap:10px;align-content:start}
.skills h3{font-size:15px;color:var(--muted);font-weight:500}
@media (max-width:640px){.skills{grid-template-columns:1fr}}
.certs{list-style:none;margin:30px 0 0;padding:0;display:grid;gap:10px}
.certs li{display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px 16px;padding-bottom:10px;border-bottom:1px dashed var(--line);font-size:15px}
.certs b{font-weight:500}
.certs .mono{font-size:12.5px}
.lang-note{margin:16px 0 0;color:var(--muted);font-size:14.5px}

/* contact */
.contact .big{margin:0 0 22px;font-size:clamp(19px,2.4vw,24px);font-weight:700;max-width:34ch;text-wrap:balance}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.contact-list li{display:grid;grid-template-columns:90px auto 1fr;align-items:center;gap:12px;min-width:0}
.contact-list .mono{font-size:12.5px}
.contact-list code{font-family:var(--f-mono);font-size:15px;overflow-wrap:anywhere}
.contact-list a{font-family:var(--f-mono);font-size:15px;overflow-wrap:anywhere}
.copy{justify-self:start;font:500 12.5px var(--f-mono);border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:6px;padding:4px 10px;cursor:pointer}
@media (max-width:520px){.contact-list li{grid-template-columns:70px 1fr}.copy{grid-column:2}}

.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 20px;padding-block:56px 40px;font-size:12.5px;color:var(--muted);padding-bottom:max(40px,env(safe-area-inset-bottom,0px))}

@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}.pulse{animation:none}}