/* ============================================================
   Lab index + experiment pages. Loaded after home.css and
   blog.css (reuses the solid sub-page nav, hero and prose).
   ============================================================ */

.page-lab .site-nav {
  background: rgba(247, 243, 236, 0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--hairline-soft);
}

/* ---------- index ---------- */

.lab-list {
  display: grid;
  gap: 1rem;
  padding-bottom: 5rem;
}

.lab-entry {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: 1.6rem;
  align-items: start;
  padding: 1.8rem 1.8rem 1.8rem 1.4rem;
  background: var(--paper-2);
  border: 1px solid var(--hairline-soft);
  border-radius: 18px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.lab-entry:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
  border-color: var(--hairline);
}

.lab-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 2.6rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--rust);
  opacity: 0.85;
}

.lab-meta {
  display: flex;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--faint);
  margin-bottom: 0.55rem;
}

.lab-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0 0 0.55rem;
  transition: color 0.2s ease;
}

.lab-entry:hover .lab-title { color: var(--rust); }

.lab-question {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.06rem;
  color: var(--ink);
  margin: 0 0 0.6rem;
}

.lab-summary {
  color: var(--muted);
  margin: 0 0 1rem;
  max-width: 62ch;
}

.lab-go {
  font-size: 1.4rem;
  color: var(--muted);
  align-self: center;
  transition: transform 0.2s ease, color 0.2s ease;
}

.lab-entry:hover .lab-go { transform: translateX(5px); color: var(--rust); }

/* ---------- experiment page ---------- */

.exp-head {
  padding-top: 128px;
  padding-bottom: 1.6rem;
  max-width: 900px;
}

.exp-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 1.2rem 0 0.8rem;
}

.exp-head .lab-question { font-size: 1.2rem; }

.stage-wrap { position: relative; }

.stage {
  position: relative;
  height: min(74vh, 720px);
  min-height: 420px;
  border-radius: 20px;
  border: 1px solid var(--hairline-soft);
  background:
    radial-gradient(120% 90% at 70% 10%, var(--paper-2), var(--paper) 60%);
  overflow: hidden;
}

.stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.stage canvas.is-ready { opacity: 1; }

.stage-note {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  padding: 2rem;
  text-align: center;
}

.stage-note[hidden] { display: none; }

.controls {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  width: min(330px, calc(100% - 2rem));
  display: grid;
  gap: 0.75rem;
  padding: 1.1rem 1.2rem 1.2rem;
  background: rgba(255, 253, 248, 0.86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--hairline-soft);
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
}

.control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 0.8rem;
  font-size: 0.84rem;
  color: var(--muted);
}

.control output {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink);
}

.control input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--rust);
}

.palette {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.palette .filter { padding: 0.45rem 0.8rem; font-size: 0.78rem; }

.control-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding-top: 0.2rem;
}

.control-btn {
  font: 600 0.8rem/1 var(--font-body);
  padding: 0.6rem 0.9rem;
  border-radius: 9px;
  border: 1px solid var(--hairline);
  background: var(--paper-2);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.control-btn:hover { border-color: var(--ink); }
.control-btn.primary { background: var(--ink); color: var(--paper-2); border-color: var(--ink); }
.control-btn.primary:hover { background: var(--rust-deep); border-color: var(--rust-deep); }

.stage-hint {
  position: absolute;
  right: 1.1rem;
  top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--faint);
  pointer-events: none;
}

.exp-notes { padding: 3.2rem 24px 5rem; }

/* ---------- responsive ---------- */

@media (max-width: 720px) {
  .lab-entry { grid-template-columns: 1fr; gap: 0.8rem; padding: 1.4rem; }
  .lab-num { font-size: 1.6rem; }
  .lab-go { display: none; }

  .stage { height: 62vh; min-height: 360px; }
  .controls {
    position: static;
    width: auto;
    margin-top: 1rem;
    box-shadow: none;
  }
  .stage-hint { display: none; }
}