.material-icons-button {
  border: none;
  background: #6366f1; /* Indigo-500 */
  padding: 15px;
  margin: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  line-height: 1;
  color: white;
  transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  box-shadow: 0 4px 6px rgba(99, 102, 241, 0.4);
}

.material-icons-button:hover {
  background-color: #4f46e5; /* Indigo-600 */
  box-shadow: 0 6px 8px rgba(79, 70, 229, 0.5);
  transform: translateY(-2px);
}

.material-icons-button:active {
  background-color: #4338ca; /* Indigo-700 */
  box-shadow: 0 3px 5px rgba(67, 56, 202, 0.6);
  transform: translateY(0);
}

.material-icons-button:hover {
  background-color: #4f46e5; /* Indigo-600 */
  box-shadow: 0 6px 8px rgba(79, 70, 229, 0.5);
}

.material-icons-button:disabled {
  cursor: default;
  opacity: 0.5;
  background: #a5b4fc; /* Indigo-300 */
  box-shadow: none;
}