.letter_list__wrap .each_letter ul li a {
  padding: 4px 12px;
  margin-left: -12px;
  border-radius: 20px;
  transition: background-color ease-in-out 0.3s, color ease-in-out 0.3s;
}
.letter_list__wrap .each_letter ul li a:hover {
  background-color: #0056b3;
  color: #fff;
  text-decoration: none;
}

li[data-code="stomatologiya"] {
  display: none;
}