.eqr-root { min-width: 0; }
.eqr-chapters { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0 0 18px; }
.eqr-chapters button { display: flex; flex-direction: column; gap: 5px; min-width: 0; min-height: 44px; padding: 9px 0; text-align: left; border: 0; border-top: 2px solid var(--hairline); background: none; color: var(--ink-2); font: .76rem/1.4 var(--font-sans); cursor: pointer; }
.eqr-chapters button small { color: var(--muted); font: .55rem var(--font-mono); }
.eqr-chapters button[aria-current] { color: var(--accent-text); border-color: var(--accent); }
.eqr-scene { position: relative; aspect-ratio: 16 / 9; min-width: 0; background: var(--surface-2); border: 1px solid var(--hairline); border-radius: 7px; overflow: hidden; }
.eqr-scene video { display: block; width: 100%; height: 100%; object-fit: contain; }
.eqr-media-message { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 12px; padding: 20px; background: var(--surface); color: var(--ink-2); }
.eqr-media-message[hidden] { display: none; }
.eqr-root button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.eqr-original .eqr-chapters { margin: 16px 0 0; }
.eqa-stage .eqr-root { padding: 22px; }
@media (max-width: 759px) {
  .eqa-stage .eqr-root { padding: 12px; }
  .eqr-chapters { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 14px; }
}