.quiz-countdown-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: grid;
  place-items: center;
  padding: 24px;
  color: #f8fafc;
  background: #07182b;
}

.quiz-countdown-overlay[hidden] {
  display: none;
}

.quiz-countdown-panel {
  display: grid;
  justify-items: center;
  gap: 12px;
  text-align: center;
}

.quiz-countdown-kicker,
.quiz-countdown-detail {
  margin: 0;
}

.quiz-countdown-kicker {
  color: #93c5fd;
  font-size: clamp(1rem, 2.2vw, 1.5rem);
  font-weight: 850;
  letter-spacing: 0.08em;
}

.quiz-countdown-value {
  display: grid;
  min-width: min(46vw, 360px);
  min-height: min(46vw, 360px);
  place-items: center;
  border: clamp(8px, 1.2vw, 14px) solid #60a5fa;
  border-radius: 50%;
  color: #fff;
  background: #0c2744;
  font-size: clamp(6rem, 22vw, 13rem);
  line-height: 1;
  box-shadow: 0 0 0 12px rgba(96, 165, 250, 0.12);
  animation: quiz-countdown-arrive 320ms ease-out both;
}

.quiz-countdown-value:not(:empty) {
  text-wrap: nowrap;
}

.quiz-countdown-overlay[data-step="go"] .quiz-countdown-value {
  font-size: clamp(2.3rem, 8vw, 5rem);
}

.quiz-countdown-detail {
  color: #cbd5e1;
  font-size: clamp(1rem, 2vw, 1.35rem);
}

@keyframes quiz-countdown-arrive {
  from { opacity: 0.55; transform: scale(0.88); }
  to { opacity: 1; transform: scale(1); }
}

@media (max-width: 520px) {
  .quiz-countdown-overlay { padding: 18px; }
  .quiz-countdown-value {
    min-width: min(68vw, 280px);
    min-height: min(68vw, 280px);
    font-size: clamp(5.5rem, 28vw, 9rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .quiz-countdown-value { animation: none; }
}