html {
    height: 100%;
  }
  
  body {
    height: 100%;
    margin: 0;
    background: #162944;
  }
  
  .button_slide {
    color: #FFF;
    border: 2px solid rgb(216, 2, 134);
    border-radius: 0px;
    padding: 18px 36px;
    display: inline-block;
    font-family: "Lucida Console", Monaco, monospace;
    font-size: 14px;
    letter-spacing: 1px;
    cursor: pointer;
    box-shadow: inset 0 0 0 0 #D80286;
    -webkit-transition: ease-out 0.4s;
    -moz-transition: ease-out 0.4s;
    transition: ease-out 0.4s;
  }
  
  .slide_down:hover {
    box-shadow: inset 0 100px 0 0 #D80286;
  }
  
  .slide_right:hover {
    box-shadow: inset 400px 0 0 0 #D80286;
  }
  
  .slide_left:hover {
    box-shadow: inset 0 0 0 50px #D80286;
  }
  
  .slide_diagonal:hover {
    box-shadow: inset 400px 50px 0 0 #F0C4B9;
  }
  
  #outer {
    width: 364px;
    margin: 50px auto 0 auto;
    text-align: center;
  }