.countdown-container {
  text-align: center;
  padding: 2rem 1rem;
  margin: 1rem 0;
}

.countdown-title {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #1a202c;
}

.countdown-subtitle {
  font-size: 1.1rem;
  color: #4a5568;
  margin-bottom: 2rem;
}

.countdown-timer {
  max-width: 600px;
  margin: 0 auto;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1rem 0;
}

.countdown-item {
  background: #f7fafc;
  border: 2px solid #e2e8f0;
  border-radius: 0.5rem;
  padding: 1.5rem 1rem;
  transition: all 0.3s ease;
}

.countdown-item:hover {
  border-color: #4299e1;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.countdown-number {
  display: block;
  font-size: 2.5rem;
  font-weight: bold;
  color: #2d3748;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.countdown-label {
  display: block;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #718096;
  font-weight: 600;
}

.countdown-expired {
  margin-top: 2rem;
}

.countdown-expired-message {
  font-size: 1.25rem;
  color: #e53e3e;
  font-weight: 600;
  background: #fed7d7;
  border: 1px solid #feb2b2;
  border-radius: 0.5rem;
  padding: 1rem;
  display: inline-block;
}

/* Responsive Design */
@media (max-width: 768px) {
  .countdown-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .countdown-item {
    padding: 1rem 0.5rem;
  }

  .countdown-number {
    font-size: 2rem;
  }

  .countdown-title {
    font-size: 1.5rem;
  }

  .countdown-subtitle {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .countdown-grid {
    grid-template-columns: 1fr;
    max-width: 200px;
    margin: 1rem auto;
  }

  .countdown-number {
    font-size: 1.75rem;
  }

  .countdown-container {
    padding: 1rem 0.5rem;
  }
}