/* kintsugi-lab.css — shared playground aesthetic: dark scientific poster, gold seams */
:root {
  --ink: #0d0b08;
  --paper: #14110c;
  --paper-2: #1c1812;
  --gold: #c9a227;
  --gold-bright: #f0d060;
  --gold-dim: #6b5620;
  --bone: #e8dcc0;
  --bone-dim: #a89a78;
  --lobster: #c0392b;
  --seam-glow: rgba(201, 162, 39, 0.35);
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--ink);
  color: var(--bone);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  min-height: 100%;
}
body {
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(201,162,39,0.07), transparent),
    radial-gradient(ellipse 60% 50% at 50% 110%, rgba(201,162,39,0.05), transparent);
}
a { color: var(--gold-bright); }
header.lab-head {
  padding: 2.5rem 2rem 1rem;
  border-bottom: 1px solid var(--gold-dim);
  position: relative;
}
header.lab-head::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold) 20%, var(--gold-bright) 50%, var(--gold) 80%, transparent);
  animation: seam-shimmer 6s ease-in-out infinite;
}
@keyframes seam-shimmer {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}
header.lab-head h1 {
  margin: 0 0 0.25rem;
  font-size: 2rem;
  letter-spacing: 0.04em;
  color: var(--bone);
}
header.lab-head h1 .gold { color: var(--gold-bright); }
header.lab-head p {
  margin: 0; color: var(--bone-dim); font-style: italic;
}
main { padding: 2rem; max-width: 1100px; margin: 0 auto; }
.piece-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
a.piece-card {
  display: block;
  text-decoration: none; color: var(--bone);
  background: linear-gradient(160deg, var(--paper-2), var(--paper));
  border: 1px solid #2e2718;
  border-radius: 6px;
  padding: 1.25rem 1.25rem 1rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
a.piece-card::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 40%, rgba(240,208,96,0.08) 50%, transparent 60%);
  transform: translateX(-120%);
  transition: transform 0.7s ease;
  pointer-events: none;
}
a.piece-card:hover {
  transform: translateY(-4px) rotate(-0.4deg);
  border-color: var(--gold);
  box-shadow: 0 8px 30px rgba(201,162,39,0.18), 0 0 0 1px var(--seam-glow);
}
a.piece-card:hover::before { transform: translateX(120%); }
a.piece-card h3 { margin: 0 0 0.4rem; color: var(--gold-bright); font-size: 1.15rem; }
a.piece-card p { margin: 0; color: var(--bone-dim); font-size: 0.92rem; line-height: 1.45; }
a.piece-card .tag {
  display: inline-block; margin-top: 0.7rem;
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--gold); border: 1px solid var(--gold-dim);
  padding: 0.15rem 0.5rem; border-radius: 3px;
}
.piece-frame { position: fixed; inset: 0; }
.piece-frame canvas { display: block; width: 100vw; height: 100vh; }
.piece-hud {
  position: fixed; left: 1rem; bottom: 1rem; z-index: 10;
  background: rgba(13,11,8,0.82);
  border: 1px solid var(--gold-dim);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  font-size: 0.85rem; color: var(--bone-dim);
  backdrop-filter: blur(4px);
  max-width: min(92vw, 430px);
}
.piece-hud b { color: var(--gold-bright); font-weight: normal; }
.piece-hud .back {
  display: inline-block; margin-bottom: 0.35rem;
  color: var(--gold); text-decoration: none; font-size: 0.8rem;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.piece-hud .back:hover { color: var(--gold-bright); }
.dust-note { color: var(--bone-dim); font-style: italic; }
footer {
  padding: 2rem; text-align: center; color: #5c5340; font-size: 0.8rem;
  border-top: 1px solid #241f14; margin-top: 2rem;
}