button {
  -webkit-appearance: none;
  background-color: transparent;
  cursor: pointer;
  outline: none;
  border: 0;
  width: 24px;
  height: 24px;
  border-radius: 100%;
  display: inline-block;
  padding: 2px 0 0;
}

button:hover {
  background: #e5e7e9;
}