button {
  background: linear-gradient(135deg, #ff2a2a, #660000);
  color: #fff;
  border: none;
  padding: 12px 30px;
  font-weight: bold;
  font-size: 1em;
  border-radius: 30px;
  box-shadow: 0 0 15px #ff2a2a, 0 0 30px #660000;
  cursor: pointer;
  transition: 0.3s ease-in-out;
}

button:hover {
  background: linear-gradient(135deg, #ff4d4d, #330000);
  box-shadow: 0 0 25px #ff4d4d, 0 0 40