.add-button {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: #007bff;
  color: white;
  font-size: 2rem;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: background-color 0.3s ease;
}

.add-button:hover {
  background-color: #0056b3;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: #1e1e1e;
  padding: 2rem;
  border-radius: 12px;
  width: 340px;
  height: 420px;
  box-shadow: 0 0 10px #000;

  /* Flexbox centering */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.modal input {
  width: 90%;
  height: 35px;
  padding: 0.5rem;
  margin-bottom: 0.75rem;
  background-color: #2c2c2c;
  border: none;
  color: white;
  border-radius: 6px;
}

.modal button {
  width: 90%;
  padding: 0.5rem;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.modal button:hover {
  background-color: #0056b3;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.add-button.spin {
  animation: spin 0.5s linear;
}