// reset & normalize
* {
  text-decoration: none;
}

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

body {
  font-size: 1.6rem;
}

// Start!
a.btn {
  position: relative;
  display: inline-block;
  padding: 1.5rem 3.5rem 1.5rem 1.5rem;
  transition: all .3s;
  color: #614f38;
  z-index: 1;
  overflow: hidden;
  background-image: linear-gradient(120deg, #ffde85 10%, #f3ae5c 100%);

  &:before {
    position: absolute;
    content: "";
    background: #614f38;
    top: 50%;
    transform: translateY(-50%);
  }

  &:before {
    width: 30px;
    right: 0;
    height: 1px;
    transition: .4s;
    transition: all .3s;
  }

  &:hover {
    color: #fff;
     padding: 1.5rem 2.5rem 1.5rem 2.5rem;
    &:before{
      width:0;
      background:#fff;
    }

  }
}