JSFiddle - React, Tailwind, and code Playground

HTML

<a class="button">Gallery</a>

<a class="button">Gallery Button Big</a>

CSS

.button {
  display: inline-block;
  margin: 30px;
  position: relative;
  outline: none;
  font-size: 40px;
  padding: 10px 30px 20px 40px;
  background-color: #333;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
  line-height: 1;
  text-transform: uppercase;
  text-align: center;
  background: linear-gradient(#333, #333), linear-gradient(hotpink, hotpink), linear-gradient(135deg, transparent 7px, hotpink 7px), linear-gradient(315deg, transparent 7px, hotpink 7px);
  background-size: calc(100% - 12px) calc(100% - 12px), calc(100% - 10px) calc(100% - 10px), 10px 100%, 100% 10px;
  background-position: 11px 1px, 10px 0px, left top, left bottom;
  background-repeat: no-repeat;
}