Pure CSS Liquid Button Animation Effects

Pure CSS Liquid Button Animation Effects

by Ying Chor Ding

HTML

<body>
<a href="#">
<span>Button</span>
<div class="liquid"></div>
</a>
</body>

CSS

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #0c0c0c;
}
a {
  position: relative;
  padding: 20px 50px;
  text-decoration: none;
  text-transform: uppercase;
  width: 200px;
  overflow: hidden;
}
a span {
  position: relative;
  z-index: 1;
  color: #fff;
  font-size: 20px;
  letter-spacing: 8px;
}
a:hover .liquid {
  top: -120px;
}
a .liquid {
  position: absolute;
  left: 0;
  top: -80px;
  width: 200px;
  height: 200px;
  background: #4973ff;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, .5);
  transition: 0.5s;
}
a .liquid::before,
a .liquid::after{
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  top: 0;
  left: 50%;
  transform: translate(-50%, -75%);
}

a .liquid::before {
  border-radius: 45%;
  background: rgba(20,20,20,1);
  animation: animate 5s linear infinite;
}
a .liquid::after{
  border-radius: 40%;
  background: rgba(20,20,20,0.5);
  animation: animate 5s linear infinite;
}
@keyframes animate {
  0% {
    transform: translate(-50%, -75%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -75%) rotate(360deg);
  }
}