.back-button {
  display: block;
  font-size: 18px;
  line-height: 24px;
  border: 2px solid #000;
  color: #000;
  background: #fff;
  text-decoration: none;
  font-family: 'UD Shin Go Regular', sans-serif;
  padding: calc((50px - 18px) /2) 16px;
  text-align: center;

  transition: color 0.25s, background-color 0.25s;
  max-width: 250px;
  margin-left: auto;
  margin-right: auto;
}

.back-button:hover {
  text-decoration: none;
  color: #fff;
  background: #000;
}