.social-icons {
  display: flex;
  justify-content: center;
  list-style: none;
  margin-top: 1rem;
  margin-bottom: 1rem;
  padding-left: 0;
}
.social-icons>li {
  margin-left: 0.25rem;
  margin-right: 0.25rem;
}
.social-icons a {
  position: relative;
  background-color: #eee;
  display: block;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  transition: background-color .3s ease-in-out;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: .25rem;
}
.social-icons a:hover {
  background-color: #e0e0e0;
}
.social-icons a::before {
  content: "";
  position: absolute;
  width: 1.2rem;
  height: 1.2rem;
  left: .65rem;
  top: .65rem;
  background: transparent no-repeat center center;
  background-size: 100% 100%;
}
.social-icons .social-icon-vk::before {
  background-image: url("https://static.tildacdn.com/tild3065-3333-4366-a238-633262303262/free-icon-telegram-3.png");
}
.social-icons .social-icon-telegram::before {
  background-image: url("...");
}
.social-icons .social-icon-youtube::before {
  background-image: url("...");
}