.button-login-yandex {
  position: relative;
  left: 45%;
  display: inline-block;
  border: none;
  border-radius: 10px;
  margin-top: 10px;
  width: 35px;
  height: 35px!important;
  padding: 0;
  outline: none;
  margin-right: 15px;
}

.button-login-icon {
    float: left;
    height: auto;
    width: 100%;
}

.button-login-yandex:hover {
    background: none!important;
}