.download-btn, .start-download {
  padding: 10px 18px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #0056b3, #007bff);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.2s ease, box-shadow 0.3s ease, filter 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.download-btn:hover, .start-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.2);
  filter: brightness(1.1);
}

.cloud-icon {
  transition: transform 0.2s ease;
}

.download-btn:hover .cloud-icon, .start-download:hover .cloud-icon {
  transform: translateY(-2px) scale(1.1);
}

.countdown {
  margin-top: 10px;
  font-weight: 600;
  color: #333;
}