/* player.css — the explainer player, made to sit inside someone else's page.
 *
 * It inherits font and colour from wherever it is placed and takes its few
 * colours of its own from these variables, so a host site restyles it by
 * setting them on .explainer rather than by overriding selectors. */

.explainer {
  --explainer-accent: currentColor;
  --explainer-rule: color-mix(in srgb, currentColor 25%, transparent);
  --explainer-track: color-mix(in srgb, currentColor 12%, transparent);
  --explainer-mark: color-mix(in srgb, currentColor 10%, transparent);
  --explainer-frame: #000;
  margin: 1.5em 0;
}

.explainer-player {
  position: relative;
  outline: none;
}

.explainer-stage {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--explainer-frame);
  cursor: pointer;
  user-select: none;
}

/* Every scene is loaded up front so a chapter change is a cut, not a load. */
.explainer-scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  visibility: hidden;
  pointer-events: none;
}

.explainer-scene.is-current {
  visibility: visible;
}

.explainer-start {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.5em 1.1em 0.5em 0.8em;
  border: 0;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  font: inherit;
  cursor: pointer;
}

.explainer-start svg {
  width: 1.6em;
  height: 1.6em;
}

.explainer-start:hover,
.explainer-start:focus-visible {
  background: rgba(0, 0, 0, 0.88);
}

.explainer-controls {
  font-size: 0.85em;
}

.explainer-bar {
  position: relative;
  height: 0.5em;
  margin: 0.5em 0 0.3em;
  background: var(--explainer-track);
  cursor: pointer;
  touch-action: none;
}

.explainer-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--explainer-accent);
  pointer-events: none;
}

.explainer-tick {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  margin-left: -1px;
  background: var(--explainer-rule);
  pointer-events: none;
}

.explainer-row {
  display: flex;
  align-items: center;
  gap: 0.4em;
  min-width: 0;
}

.explainer-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2em;
  height: 2em;
  padding: 0.3em;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.explainer-btn svg {
  width: 100%;
  height: 100%;
}

.explainer-btn:hover {
  color: var(--explainer-accent);
}

.explainer-time {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  margin-left: 0.3em;
}

.explainer-now {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0.75;
  margin-left: 0.6em;
}

.explainer-full {
  margin-left: auto;
}

.explainer-player:fullscreen {
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #000;
  color: #fff;
  padding: 0 2vw 1vh;
}

.explainer-player:fullscreen .explainer-stage {
  width: min(100%, calc((100vh - 5em) * var(--explainer-aspect, 16 / 9)));
  margin: 0 auto;
}

.explainer-transcript [data-at] {
  cursor: pointer;
}

.explainer-cue.is-current {
  background: var(--explainer-mark);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.explainer-failed .explainer-player {
  display: none;
}

@media print {
  .explainer-player {
    display: none;
  }
}