.av-stage { aspect-ratio: 16 / 11; }
.hint { font-size: 0.85rem; color: var(--zs-muted); }

.av-lockup {
  display: block;
  width: min(240px, 68vw);
  height: auto;
  margin: 0 auto 0.5rem;
}
.av-overlay-title {
  margin: 0 0 0.35rem;
  font-family: var(--zs-display);
  font-size: clamp(1.2rem, 3.5vw, 1.55rem);
  color: var(--zs-ink);
  text-align: center;
  font-weight: 700;
}
.av-overlay-title[hidden] {
  display: none !important;
}

.av-focus[hidden],
.av-quiz[hidden] {
  display: none !important;
}

.av-focus {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 5;
  background: rgba(243, 247, 246, 0.72);
  pointer-events: none;
}
.av-ring {
  position: absolute;
  width: min(42vmin, 220px);
  height: min(42vmin, 220px);
  border-radius: 50%;
  border: 2px solid rgba(15, 158, 142, 0.35);
  box-shadow: inset 0 0 28px rgba(15, 158, 142, 0.08);
  animation: av-ring-pulse 1.1s ease-in-out infinite alternate;
}
.av-word {
  position: relative;
  z-index: 1;
  font-family: var(--zs-display);
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  letter-spacing: 0.06em;
  color: var(--zs-cyan-deep);
  text-align: center;
  padding: 1rem;
  animation: zs-flash-word linear forwards;
  max-width: 90%;
  font-weight: 700;
}

@keyframes av-ring-pulse {
  from { opacity: 0.55; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1.04); }
}

.av-quiz {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.25rem;
  gap: 0.85rem;
  background: rgba(255, 255, 255, 0.94);
  animation: av-quiz-in 0.28s ease-out;
}
@keyframes av-quiz-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.av-prompt {
  margin: 0;
  text-align: center;
  color: var(--zs-ink);
  font-size: 1.05rem;
}
.av-choices {
  display: grid;
  gap: 0.55rem;
}
.av-choice {
  appearance: none;
  border: 1px solid rgba(10, 22, 40, 0.12);
  background: #fff;
  color: var(--zs-ink);
  font-family: var(--zs-font);
  font-size: 0.98rem;
  padding: 0.75rem 0.9rem;
  border-radius: 0.55rem;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.av-choice:hover { border-color: var(--zs-cyan); background: var(--zs-teal-soft); }
.av-choice.is-correct {
  border-color: var(--zs-cyan-deep);
  background: rgba(15, 158, 142, 0.12);
}
.av-choice.is-wrong {
  border-color: var(--zs-error);
  background: rgba(154, 61, 47, 0.1);
}
.av-timer {
  height: 4px;
  background: rgba(10, 22, 40, 0.08);
  border-radius: 999px;
  overflow: hidden;
}
.av-timer__bar {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--zs-cyan), var(--zs-blue));
  transform-origin: left center;
}