<a href="#" class="btn"><span>Click Click Click! <span></a>
// reset & normalize
* {
  text-decoration: none;
}

html {
  font-size: 62.5%; // 62.5% = 1rem = 10px
  padding: 3rem;
  color: #614f38;
}

body {
  font-size: 1.6rem;
}

// Start!
.btn {
  display: inline-block;
  position: relative;
  background: #fff;
  color: #614f38;
  padding: 1.5rem  2.5rem 1.5rem 6rem;
  transition: all .3s;

  &:before,
  &:after {
    content: "";
    position: absolute;
    display: block;
    top: 50%;
  }

  &:before {
    width: .6rem;
    height: .6rem;
    left: 2rem;
    border-top: solid 2px #fff;
    border-right: solid 2px #fff;
    z-index: 2;
    transform: translateY(-50%) rotate(45deg);
    transition: all .3s;

  }

  &:after {

    left: 0;
    background: #614f38;
    z-index: 1;
    width: 5rem;
    height: 5rem;
    border-radius: 4rem;
    transform: translateY(-50%);
    transition: all .5s;
  }

  span {
    position: relative;
    transition: all .3s;
    z-index: 3;
  }

  &:hover {
    padding: 1.5rem  2.5rem 1.5rem 4.5rem;
    span {
      color: #fff;
    }
    &:before{
      left:2.5rem;
    }
    &:after {
      right: 0;
      width: 100%;
    }
  }
}
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