Only CSS: 🔥Button

index.pug

a 🔥🔥🔥

only-css-button.markdown

Only CSS: 🔥Button

Burn!

A Pen by Yusuke Nakaya on CodePen.

License.

style.scss

body {
  background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

a {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 50px;
  background: #fff;
  border-radius: 999px;
  
  
  
  &:hover {
    // box-shadow: 0 0 20px 10px rgba(230, 30, 10, 0.6);
    animation: burn 1000ms ease-out forwards;
    
    &::before {
      content: '';
      position: absolute;
      left: 40px;
      width: 100px;
      height: 40px;
      background: rgba(255, 230, 110, 1);
      border-radius: 100%;
      animation: flare 1000ms ease-out forwards;
    }

    &::after {
      content: '';
      position: absolute;
      right: 40px;
      width: 100px;
      height: 40px;
      background: rgba(255, 230, 110, 1);
      border-radius: 100%;
      animation: flare 1000ms ease-out forwards;
    }
  }
}

@keyframes flare {
  100% {
    transform: translateY(-20px) scale(1.5);
    filter: blur(10px);
    opacity: 0;
  }
}

@keyframes burn {
  0% {
    color: rgba(255, 130, 110, 1);
    background: rgba(255, 230, 110, 1);
    box-shadow:
      0 0 5px 0 rgba(200, 0, 10, 1),
      0 0 5px 0 rgba(230, 30, 10, 0.8),
      0 0 5px 0 rgba(230, 230, 10, 0.6);
  }
  
  100% {
    color: rgba(0, 0, 0, 1);
    background: rgba(255, 255, 255, 1);
    box-shadow:
      0 -35px 40px 30px rgba(255, 130, 10, 0),
      0 -30px 30px 10px rgba(230, 30, 10, 0),
      0 -20px 10px 0 rgba(255, 255, 10, 0);
  }
}