#screen-countdown {
  position: fixed;
  inset: 0;
  z-index: 20;
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-family: var(--font-ui);
}

.countdown-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  width: 100%;
  padding: var(--space-8) var(--space-6);
}

.countdown-digit {
  font-family: var(--font-mono);
  font-size: clamp(6rem, 40vw, 14rem);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: transform 0.1s ease-out, opacity 0.1s ease-out;
}

.countdown-digit.is-ticking {
  transform: scale(0.9);
  opacity: 0.7;
}

.countdown-label {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  margin: 0;
}

.countdown-cancel-btn {
  width: 100%;
  max-width: 320px;
  min-height: 64px;
  background-color: var(--color-stop);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-ui);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  touch-action: manipulation;
  transition: opacity 0.15s ease, background-color 0.15s ease;
}

.countdown-cancel-btn:hover {
  background-color: var(--color-stop-dim);
}

.countdown-cancel-btn:active {
  opacity: 0.85;
}