/* ═══════════════════════════════════════════════════════════════
   OmicsLab — Explainer (flat-vector animated scene component)
   Themeable via --exp-* custom properties; override per-instance
   or per-scene (js/explainer.js writes scene.palette onto these).
   ═══════════════════════════════════════════════════════════════ */

.ol-explainer {
  --exp-primary:      var(--green);
  --exp-accent:       var(--blue);
  --exp-neutral:      var(--text-muted);
  --exp-bg:           var(--bg-surface);
  --exp-caption-text: var(--text-secondary);
  --exp-dur:          420ms;
  --exp-ease:         var(--ease-out);
  --exp-radius:       var(--radius-lg);

  max-width: 640px;
  margin-inline: auto;
}

.ol-exp-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--exp-bg);
  border: 1px solid var(--border-default);
  border-radius: var(--exp-radius);
  overflow: hidden;
}

.ol-exp-el {
  position: absolute;
  overflow: visible;
  opacity: 0;
  transform: translate(-50%, -50%) var(--exp-offset, translate(0, 0));
  transition: opacity var(--exp-dur) var(--exp-ease),
              transform var(--exp-dur) var(--exp-ease);
  pointer-events: none;
}
.ol-exp-el.is-in { opacity: 1; transform: translate(-50%, -50%); }

.ol-exp-el[data-motion="slide-up"]    { --exp-offset: translate(0, 16px); }
.ol-exp-el[data-motion="slide-down"]  { --exp-offset: translate(0, -16px); }
.ol-exp-el[data-motion="slide-left"]  { --exp-offset: translate(16px, 0); }
.ol-exp-el[data-motion="slide-right"] { --exp-offset: translate(-16px, 0); }

.ol-shape-primary  { fill: var(--exp-primary);  stroke: var(--exp-primary); }
.ol-shape-accent   { fill: var(--exp-accent);   stroke: var(--exp-accent); }
.ol-shape-neutral  { fill: var(--exp-neutral);  stroke: var(--exp-neutral); }
.ol-shape-onaccent { fill: var(--exp-bg);       stroke: var(--exp-bg); }
/* stroke-only paths (helix strands, trace lines, checkmarks) — must come
   after the color classes above so it wins the fill tie and actually
   shows as a line, not a filled wedge between the path's endpoints. */
.ol-shape-line { fill: none; }

.ol-exp-caption {
  min-height: 2.6em;
  margin: var(--space-4) var(--space-2) 0;
  padding: 0;
  color: var(--exp-caption-text);
  font-size: var(--text-md);
  line-height: 1.5;
  text-align: center;
}

.ol-exp-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-3);
}

.ol-exp-dots {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.ol-exp-dot {
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  display: grid;
  place-items: center;
}
.ol-exp-dot::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--border-strong);
  transition: background var(--dur-normal) var(--ease-out),
              transform var(--dur-normal) var(--ease-out);
}
.ol-exp-dot.is-active::before {
  background: var(--exp-primary);
  transform: scale(1.35);
}
.ol-exp-dot:hover::before { background: var(--exp-accent); }

@media (max-width: 480px) {
  .ol-exp-caption { font-size: var(--text-sm); margin-top: var(--space-3); }
  .ol-exp-controls { gap: var(--space-3); }
}

/* ── Modal launcher (opt-in "watch how it works") ── */
.ol-exp-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: rgba(4, 7, 12, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.ol-exp-modal-card {
  position: relative;
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-6) var(--space-5) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.ol-exp-modal-close {
  position: absolute;
  z-index: 1;
  top: var(--space-3);
  right: var(--space-3);
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-pill);
  background: var(--bg-root);
  color: var(--text-muted);
  cursor: pointer;
}
.ol-exp-modal-close:hover { color: var(--text-primary); border-color: var(--border-strong); }