body {
  padding: 0;
  margin: 0;
}

.center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.center a {
  display: inherit;

  width: 250px;
  line-height: 2;

  font-size: 36px;
  text-align: center;
  text-decoration: none;
  color: #262626;
  border: 1px solid #262626;
  cursor: pointer;
  transform: skew(15deg);
}

.center a:hover {
  color: #fff;
  background-color: lightblue;
  box-shadow: -120px 120px 10px #ccc;
}

.center span {
  position: absolute;
  border: 1px solid #262626;
}

.center span:first-child {
  left: -33px;
  top: 15px;

  width: 30px;
  height: 100%;

  border-right: 0;
  transform: skewY(-45deg);
}

.center span:last-child {
  right: 16px;
  bottom: -33px;

  width: 100%;
  height: 30px;

  border-top: 0;
  border-left: 0;
  transform: skewX(-45deg);
}