<div class="container">
  <a class="btn-handwriting" href="#">PUSH ME</a>
</div>
/* ここはコピーしなくてOK */
.container {
  text-align: center;
  padding-top: 40px;
  @import url('https://fonts.googleapis.com/css2?family=Itim&display=swap');
  font-family: 'Itim', cursive;
}

/* ここから下がボタンのCSS */
.btn-handwriting {
  display: inline-block;
  text-decoration: none;
  color: #726B62;
  font-weight: 700;
  letter-spacing: 2px;
  width: 220px;
  text-align: center;
  padding: 14px 16px;
  position: relative;
  opacity: 1 !important;
  transition: all 0.2s;
  border: 1px solid #726B62;
}
.btn-handwriting:hover {
  border-left: none;
  border-right: none;
  letter-spacing: 5px;
}
.btn-handwriting:hover:before, .btn-handwriting:hover:after {
  width: 100%;
  height: 1px;
  left: 0;
  top: 2px;
  transition: width 0.4s;
}
.btn-handwriting:hover:after {
  left: auto;
  right: 0;
  top: auto;
  bottom: 2px;
}
.btn-handwriting:before, .btn-handwriting:after {
  content: "";
  display: block;
  width: 1px;
  height: 100%;
  background-color: #726B62;
  position: absolute;
  top: 0;
}
.btn-handwriting:before {
  right: 3px;
}
.btn-handwriting:after {
  left: 3px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.