button {
  height: 35px;
  margin: 5px 10px;
  padding: 6px;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  -webkit-transition: background-color 0.3s ease-in-out;
  -o-transition: background-color 0.3s ease-in-out;
  transition: background-color 0.3s ease-in-out;
  background-color: var(--button-color, #eee);
  color: #000000;
}
button:hover {
  background-color: var(--button-color-hover, #ddd);
}
button:active {
  background-color: var(--button-color-active, #ccc);
}