.main{
  margin: 0 auto;
  text-align: center;
}
.button {
  /* 테투리 css */
  border: 5px solid;
  border-image: linear-gradient(to right, #fffb04, #00ff51);
  border-image-slice: 1;

  /* 기본 css */
  display: inline-block;
  text-align: center;
  padding: 50px 100px;
  color: white;
  background-color: #00000052;
  font-size: 2rem;
  font-weight: 600;
}