Rounded button with cool hover effect

index.html

<div>
  <a href="http://turn.lv" class="button">Made with &#9825; by Turn</a>
</div>

rounded-button-with-cool-hover-effect.markdown

Rounded button with cool hover effect

Based on http://tympanus.net/Development/CreativeButtons/ but upgraded to support not transparent background color.

A Pen by Osvalds Neiders on CodePen.

License.

style.scss

@import "bourbon";
@import "neat"; 
@import url(https://fonts.googleapis.com/css?family=Open+Sans);
* {
  font-family: "Open Sans", sans-serif;
}
div {
  position: absolute;
  left: 50%;
  top:50%;
  transform: translate(-50%, -50%);
}
.button{
  background: none;
  text-decoration: none;
  display: inline-block;
  color: #fff;
  font-size: em(24);
  line-height:  1.2;
  padding: em(9, 24) em(24,24);
  border-radius: em(30, 24);
  min-width: em(30, 24);
  text-align: center;
  font-weight: normal;
  border: none;
  position: relative;
  vertical-align: middle;
  z-index: 3;
  overflow: hidden;

  &:before{
    border-radius: em(30, 24);
    content: "";
    position: absolute;
    z-index: -2;
    transition: all 0.3s;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(to right, rgba(167,207,223,1) 0%,rgba(35,83,138,1) 100%); /* W3C */
  }

  &:after{
    border-radius: em(30, 24);
    content: "";
    position: absolute;
    z-index: -1;
    transition: all 0.3s;
    width: 0;
    height: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(to right, rgba(35,83,138,1) 0%,rgba(167,207,223,1) 100%); /* W3C */
  }

  &:hover, &:active, &:focus {
    cursor: pointer;
    &:after{
      width: 100%;
    }
  }
}