:root {
  --pageBlack: #262626;
  --pageYellow: #ffd83e;
  --pagePurple: #552b55;
  --pageRed: #E1332d;
  --pageGreen: #2ce771;
  --pageGrey: #212121;


  

}
body {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  font-family: sans-serif;
  background-color: var(--pageGrey);
}

a {
  padding: 20px 40px;
  text-decoration: none;
  text-transform: uppercase;
  background-color: var(--pageYellow);
  color: white;
  font-size: 25px;
  letter-spacing: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.5s;
  
}

a:before {
  content: 'button';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--pageGreen);
  display: flex;
  justify-content: center;
  align-items: center;
  transform: rotateX(270deg);
  transition: all 0.5s;
  transform-origin: top;
}
a:hover:before, a:hover:after {  
  transform: rotateX(0deg);

} 

a:after {
  content: 'button';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--pageRed);
  display: flex;
  justify-content: center;
  align-items: center;
  transform: rotateX(270deg);
  transition: all 0.5s;
  transition-delay: 0.25s;
  transform-origin: top;
}