.hidden {
    display: none;
}

.container{
    width: 50%;
    margin: 0 auto;
  }
  @keyframes load{
    from {
      width: 0%
    }
  }
  @-webkit-keyframes load{
    from {
      width: 0%
    }
  }
  @-moz-keyframes load{
    from {
      width: 0%
    }
  }
  @-o-keyframes load{
    from {
      width: 0%
    }
  }
  
  .bar{
    background-color: #000;
    padding: 2px;
    border-radius: 15px;
    margin-bottom: 5px;
    font-size: 14px;
    color: #FFF;
    font-weight: bold;
    text-shadow: 1px 1px 1px rgba(0,0,0,0.5);
  }
  .bar::before{
    content:  attr(data-skill);
    background-color: teal;
    display: inline-block;
    padding: 5px 0 5px 10px;
    border-radius: inherit;
    animation: load 2s 0s;
    -webkit-animation: load 2s 0s;
    -moz-animation: load 2s 0s;
    -o-animation: load 2s 0s;
  }
  
  .bar.learning::before{
    width: calc(20% - 10px);
  }
  .bar.basic::before{
    width: calc(40% - 10px);
  }
  .bar.intermediate::before{
    width: calc(60% - 10px);
  }
  .bar.advanced::before{
    width: calc(80% - 10px);
  }
  .bar.expert::before{
    width: calc(100% - 10px);
  }

/* Hover gradients */

  .card:hover::before {
    opacity: 1;
  }
  
  .card::before {
    background: radial-gradient(
    300px circle at var(--mouse-x) var(--mouse-y),
    rgba(0,128,128, 0.5),
    transparent 40%
    );
    border-radius: inherit;
    content: "";
    height: 100%;
    left: 0px;
    position: absolute;
    top: 0px;
    width: 100%;
    z-index: 2;
    opacity: 0;
    transition: opacity 500ms;
  }