.sed-explainer {
  --sed-green: #76b900;
  --sed-panel: #111111;
  --sed-muted: #b3b3b3;
  width: 100%;
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid #2f2f2f;
  border-radius: 10px;
  background: #000;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
  color: #fff;
  font-family: "NVIDIA Sans", Inter, Arial, sans-serif;
}

.sed-explainer__viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 260px;
  background: #000;
}

.sed-explainer canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.sed-explainer__controls {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 7px 10px;
  border-top: 1px solid #282828;
  background: #0b0b0b;
}

.sed-explainer__button {
  min-width: 68px;
  padding: 6px 10px;
  border: 1px solid #4b4b4b;
  border-radius: 5px;
  background: #181818;
  color: #fff;
  font: 600 12px/1 "NVIDIA Sans", Inter, Arial, sans-serif;
  cursor: pointer;
}

.sed-explainer__button:hover,
.sed-explainer__button:focus-visible {
  border-color: var(--sed-green);
  outline: none;
}

.sed-explainer__timeline {
  flex: 1;
  accent-color: var(--sed-green);
  cursor: pointer;
}

.sed-explainer__time {
  min-width: 76px;
  color: var(--sed-muted);
  font-size: 11px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.sed-explainer__fallback {
  margin: 0;
  padding: 10px 14px;
  color: var(--sed-muted);
  background: #000;
  font-size: 12px;
}

@media (max-width: 640px) {
  .sed-explainer__viewport { min-height: 210px; }
  .sed-explainer__controls { gap: 6px; }
  .sed-explainer__button { min-width: 60px; padding-inline: 7px; }
  .sed-explainer__time { min-width: 62px; }
}

@media (prefers-reduced-motion: reduce) {
  .sed-explainer__button[data-action="play"] { display: none; }
}