/* =====================================================================
   GeekHuang Lab — featured experiment cards (§03 LATEST EXPERIMENTS)
   Rendered by js/main.js for GH.experiments items that have url + thumb.
   Static webp thumbnails only (no WebGL / iframes on the homepage).
   Light/dark thumbnail follows <html data-theme>; lazy-loaded, so the
   hidden variant is not downloaded.
   ===================================================================== */
.labcard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 28px;
}
.labcard-grid[hidden] { display: none; }
@media (min-width: 768px) { .labcard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; } }

.labcard-grid > li { display: flex; }

.labcard {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  isolation: isolate;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}
.labcard:hover,
.labcard:focus-visible {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--cyan) 45%, transparent);
  box-shadow: var(--glow);
}

.labcard__media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.labcard__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease);
}
.labcard:hover .labcard__img { transform: scale(1.025); }
.labcard__img--dark { display: none; }
[data-theme="dark"] .labcard__img--light { display: none; }
[data-theme="dark"] .labcard__img--dark  { display: block; }

.labcard__n {
  position: absolute;
  left: 14px;
  top: 12px;
  padding: 2px 8px;
  color: var(--cyan);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.labcard__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px 20px;
}
.labcard__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.labcard__path { color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.labcard__title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-size: clamp(18px, 1vw + 12px, 24px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text);
  transition: color var(--t-fast) var(--ease);
}
.labcard:hover .labcard__title { color: var(--cyan); }
.labcard__arrow { color: var(--cyan); transition: transform var(--t-fast) var(--ease); }
.labcard:hover .labcard__arrow { transform: translate(2px, -2px); }
.labcard__desc { color: var(--text-2); max-width: 60ch; }
.labcard__tags { color: var(--text-3); margin-top: 2px; }
.labcard__tags .sep { color: var(--line-3); }
.labcard .tone-violet { color: var(--violet); }
.labcard .tone-cyan   { color: var(--cyan); }

@media (prefers-reduced-motion: reduce) {
  .labcard, .labcard__img, .labcard__arrow { transition: none; }
  .labcard:hover, .labcard:hover .labcard__img { transform: none; }
}