/* ==========================================================
   Minghao Zhou — portfolio
   Palette drawn from a Maya viewport: graphite ground,
   warm off-white text, rig-control yellow as the one accent.
   ========================================================== */

:root{
  --bg:#17191C;
  --bg-2:#1E2125;
  --bg-3:#262A2F;
  --line:#32373D;
  --line-soft:#262B30;
  --fg:#E9E6E1;
  --fg-2:#B4B8BD;
  --fg-3:#83888F;
  --accent:#E0CE4B;
  --accent-dim:#8A7F2E;

  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;

  --wrap:1180px;
  --gutter:clamp(20px,4vw,56px);
  --radius:3px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}

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

/* label = small mono metadata, used throughout */
.label{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0.09em;
  text-transform:uppercase;
  color:var(--fg-3);
}

/* ---------------- header ---------------- */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(23,25,28,0.88);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.site-head .wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:62px;
}
.brand{
  font-weight:600;font-size:15px;letter-spacing:-0.01em;
  text-decoration:none;white-space:nowrap;
}
.brand span{color:var(--accent)}
.nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav a{
  font-family:var(--mono);font-size:11.5px;letter-spacing:0.06em;
  text-transform:uppercase;color:var(--fg-3);text-decoration:none;
  padding:7px 11px;border-radius:var(--radius);
  transition:color .15s ease,background .15s ease;
}
.nav a:hover,.nav a:focus-visible{color:var(--fg);background:var(--bg-3)}
.nav a[aria-current="page"]{color:var(--accent)}
.nav a.cv{border:1px solid var(--line);color:var(--fg-2)}
.nav a.cv:hover{border-color:var(--accent-dim);color:var(--accent)}

/* ---------------- hero ---------------- */
.hero{padding:clamp(56px,10vw,120px) 0 clamp(40px,6vw,72px);border-bottom:1px solid var(--line-soft)}
.hero h1{
  margin:14px 0 0;
  font-size:clamp(34px,6.4vw,68px);
  line-height:1.02;
  letter-spacing:-0.035em;
  font-weight:600;
  max-width:16ch;
}
.hero .lede{
  margin:22px 0 0;max-width:56ch;
  font-size:clamp(16px,1.9vw,19px);color:var(--fg-2);line-height:1.62;
}
.hero .lede strong{color:var(--fg);font-weight:500}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.btn{
  font-family:var(--mono);font-size:12px;letter-spacing:0.06em;text-transform:uppercase;
  text-decoration:none;padding:11px 18px;border-radius:var(--radius);
  border:1px solid var(--line);color:var(--fg-2);
  transition:.15s ease;
}
.btn:hover{border-color:var(--accent-dim);color:var(--accent)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#1A1A12;font-weight:500}
.btn-primary:hover{background:#EDDC63;border-color:#EDDC63;color:#1A1A12}

/* ---------------- work grid ---------------- */
.section{padding:clamp(44px,6vw,76px) 0;scroll-margin-top:72px}
.section + .section{border-top:1px solid var(--line-soft)}
.section-head{display:flex;align-items:baseline;gap:16px;margin-bottom:28px;flex-wrap:wrap}
.section-head h2{
  margin:0;font-size:clamp(20px,2.6vw,26px);font-weight:600;letter-spacing:-0.02em;
}
.section-head .count{font-family:var(--mono);font-size:11px;color:var(--fg-3)}
.section-note{margin:-16px 0 28px;color:var(--fg-3);font-size:14.5px;max-width:62ch}

.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:clamp(18px,2.4vw,30px);
}
.card{
  display:block;text-decoration:none;color:inherit;
  border:1px solid var(--line-soft);border-radius:var(--radius);
  background:var(--bg-2);overflow:hidden;
  transition:border-color .18s ease,transform .18s ease;
}
.card:hover,.card:focus-visible{border-color:var(--accent-dim);transform:translateY(-2px)}
.card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.thumb{
  aspect-ratio:16/10;background:var(--bg-3);
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
/* always show the whole image, scaled down and centred in the slot (never cropped) */
.thumb img{width:100%;height:100%;object-fit:contain;padding:12px}
.thumb .ph{font-family:var(--mono);font-size:10.5px;color:var(--fg-3);letter-spacing:.05em;padding:10px;text-align:center}
/* the filename label is a fallback only — once the image loads it must not sit beside it.
   onerror removes the img, which un-matches this rule and brings the label back. */
.thumb img ~ .ph{display:none}
.card-body{padding:16px 18px 18px}
.card-body h3{margin:0;font-size:17px;font-weight:600;letter-spacing:-0.012em}
.card-body .role{margin:5px 0 0;font-size:13.5px;color:var(--fg-2)}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.tag{
  font-family:var(--mono);font-size:10px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--fg-3);border:1px solid var(--line);border-radius:2px;padding:3px 7px;
}

/* ---------------- project page ---------------- */
.proj-head{padding:clamp(40px,6vw,76px) 0 clamp(26px,3vw,38px)}
.proj-head h1{
  margin:12px 0 0;font-size:clamp(30px,5.2vw,52px);
  line-height:1.05;letter-spacing:-0.032em;font-weight:600;max-width:20ch;
}
.proj-head .summary{margin:20px 0 0;max-width:62ch;font-size:clamp(16px,1.8vw,18px);color:var(--fg-2)}
.meta{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:18px 28px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line-soft);
}
.meta dt{font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--fg-3)}
.meta dd{margin:6px 0 0;font-size:14.5px;color:var(--fg)}
.meta a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-dim);word-break:break-word}
.meta a:hover{border-bottom-color:var(--accent)}

.prose{max-width:68ch;padding-bottom:10px}
.prose h2{margin:44px 0 12px;font-size:20px;font-weight:600;letter-spacing:-0.018em}
.prose h2:first-child{margin-top:0}
.prose p{margin:0 0 16px;color:var(--fg-2)}
.prose ul{margin:0 0 16px;padding-left:0;list-style:none}
.prose li{position:relative;padding-left:18px;margin-bottom:8px;color:var(--fg-2)}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:1px;background:var(--accent-dim)}
.prose a{color:var(--accent)}

figure{margin:34px 0}
/* render at the file's own pixel size, still capped on narrow screens */
figure img{display:block;border:1px solid var(--line-soft);border-radius:var(--radius);width:auto;max-width:100%;height:auto;margin-inline:auto}
figure .ph{
  aspect-ratio:16/9;background:var(--bg-2);border:1px dashed var(--line);
  border-radius:var(--radius);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:11px;color:var(--fg-3);text-align:center;padding:16px;
}
figcaption{margin-top:10px;font-size:13px;color:var(--fg-3);max-width:62ch}

.media-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.media-row figure{margin:0}

.embed{position:relative;aspect-ratio:16/9;margin:34px 0;border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden;background:#000}
.embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* empty video slot — shown until an embed URL is filled in */
.video-ph{
  aspect-ratio:16/9;margin:34px 0;
  border:1px dashed var(--line);border-radius:var(--radius);
  background:var(--bg-2);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:8px;text-align:center;padding:24px;
}
.video-ph .icon{
  width:38px;height:38px;border:1px solid var(--line);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--fg-3);
}
.video-ph .icon svg{width:13px;height:13px;margin-left:2px}
.video-ph strong{font-size:14px;font-weight:500;color:var(--fg-2)}
.video-ph code{
  font-family:var(--mono);font-size:11px;color:var(--fg-3);
  background:var(--bg-3);border-radius:2px;padding:3px 7px;
}

/* ---------------- demo reel ---------------- */
.reel{padding:clamp(44px,6vw,72px) 0;border-bottom:1px solid var(--line-soft);scroll-margin-top:72px}
.reel .section-head{margin-bottom:20px}
.reel .embed,.reel .video-ph{margin:0}
.reel .reel-note{margin:14px 0 0;font-size:13.5px;color:var(--fg-3);max-width:62ch}

.backlink{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--fg-3);text-decoration:none;
}
.backlink:hover{color:var(--accent)}

.pager{display:flex;justify-content:space-between;gap:20px;padding:34px 0;border-top:1px solid var(--line-soft);flex-wrap:wrap}
.pager a{text-decoration:none;color:var(--fg-2);font-size:14.5px}
.pager a:hover{color:var(--accent)}
.pager .label{display:block;margin-bottom:3px}

/* ---------------- about / teaching ---------------- */
.two-col{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:clamp(30px,5vw,70px);align-items:start}
.sidecard{border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--bg-2);padding:22px}
.sidecard h3{margin:0 0 14px;font-size:15px;font-weight:600}
.sidecard dl{margin:0}
.sidecard dt{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);margin-top:14px}
.sidecard dt:first-child{margin-top:0}
.sidecard dd{margin:4px 0 0;font-size:14px;color:var(--fg-2)}
.sidecard a{color:var(--accent);text-decoration:none}
.sidecard a:hover{text-decoration:underline}

.course{padding:20px 0;border-top:1px solid var(--line-soft)}
.course:first-of-type{border-top:0}
.course .code{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.07em}
.course h3{margin:6px 0 0;font-size:18px;font-weight:600;letter-spacing:-0.015em}
.course .tools{margin:4px 0 0;font-size:13.5px;color:var(--fg-3)}
.course p{margin:10px 0 0;color:var(--fg-2);font-size:15px;max-width:66ch}

/* ---------------- footer ---------------- */
.site-foot{border-top:1px solid var(--line-soft);padding:40px 0 56px;margin-top:20px}
.site-foot .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
.site-foot a{color:var(--fg-2);text-decoration:none}
.site-foot a:hover{color:var(--accent)}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;font-size:14px}
.copyright{font-family:var(--mono);font-size:11px;color:var(--fg-3)}

/* ---------------- responsive ---------------- */
@media (max-width:820px){
  .two-col{grid-template-columns:1fr}
}
@media (max-width:640px){
  .site-head .wrap{height:auto;padding-top:12px;padding-bottom:12px;flex-direction:column;align-items:flex-start;gap:10px}
  .nav{gap:2px;margin-left:-11px}
  .grid{grid-template-columns:1fr}
}

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