/* HTML */
<a href="#"><button class="button-23">Button</button></a>

/* CSS */
.button-23 {
  align-items: center;
  justify-content: center;
  outline: none;
  cursor: pointer;
  width: 150px;
  height: 50px;
  background-image: linear-gradient(to top, #D8D9DB 0%, #fff 80%, #FDFDFD 100%);
  border-radius: 30px;
  border: 1px solid #8F9092;
  transition: all 0.2s ease;
  font-family: "Source Sans Pro", sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #606060;
  text-shadow: 0 1px #fff;
}

.button-23:hover {
  box-shadow: 0 4px 3px 1px #FCFCFC, 0 6px 8px #D6D7D9, 0 -4px 4px #CECFD1, 0 -6px 4px #FEFEFE, inset 0 0 3px 3px #CECFD1;
}

.button-23:active {
  box-shadow: 0 4px 3px 1px #FCFCFC, 0 6px 8px #D6D7D9, 0 -4px 4px #CECFD1, 0 -6px 4px #FEFEFE, inset 0 0 5px 3px #999, inset 0 0 30px #aaa;
}

.button-23:focus {
  box-shadow: 0 4px 3px 1px #FCFCFC, 0 6px 8px #D6D7D9, 0 -4px 4px #CECFD1, 0 -6px 4px #FEFEFE, inset 0 0 5px 3px #999, inset 0 0 30px #aaa;
}