ボタン
CSS

Split Reveal Button

ホバーで上下にスプリットしてテキストが切り替わるボタン。

HTML
<button class="split-btn" data-text="Go"><span>Go</span></button>
CSS
.split-btn {
  position: relative;
  padding: 12px 36px;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  overflow: hidden;
}
.split-btn span {
  display: inline-block;
  transition: transform .3s cubic-bezier(.4,0,.2,1);
}
.split-btn::after {
  content: attr(data-text);
  position: absolute;
  left: 0; right: 0;
  text-align: center;
  transform: translateY(120%);
  transition: transform .3s cubic-bezier(.4,0,.2,1);
}
.split-btn:hover span { transform: translateY(-120%); }
.split-btn:hover::after { transform: translateY(0); }