.sns {
  width: 39px;
  position: absolute;
  top: 5%;
  right: 5%;
  z-index: 10;
}

.sns__list li:not(:last-child) {
  margin-bottom: 4px;
}

.sns__list li a {
  display: block;
  transition: all 0.3s;
}

.sns__list li a:hover {
  opacity: 0.8;
}

@media screen and (max-width: 768px) {
  .sns {
    width: 90px;
    top: 10px;
    right: 10px;
  }
  .sns__list {
    display: flex;
    justify-content: space-between;
  }
  .sns__list li {
    width: 25px;
  }
  .sns__list li:not(:last-child) {
    margin-bottom: 0;
  }
}