.countdown-tool {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: white;
}

.countdown-display {
  text-align: center;
  margin-bottom: 4vh;
}

.number {
  font-size: min(40vw, 600px);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  transition: all 0.5s ease;
  animation: pulse 1s ease-in-out;
}

.dots {
  font-size: min(15vw, 200px);
  color: var(--color-primary);
  letter-spacing: 0.2em;
  line-height: 1;
  margin-top: -0.5em;
  animation: fade-in 0.5s ease-in-out;
}

.ready {
  font-size: min(20vw, 300px);
  animation: ready-pulse 0.5s ease-in-out;
}

.countdown-controls {
  margin-top: 4vh;
}

.start-btn {
  font-size: min(3vw, 24px);
  padding: min(3vh, 20px) min(4vw, 32px);
  background: var(--color-gray-600);
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  min-width: min(20vw, 160px);
}

.start-btn:hover {
  background: var(--color-gray-700);
  transform: translateY(-2px);
}

@keyframes pulse {
  0% { transform: scale(0.8); opacity: 0; }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes fade-in {
  0% { opacity: 0; transform: translateY(-20px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes ready-pulse {
  0% { transform: scale(0.9); opacity: 0; }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}