body {
    font-size: 10px;
    background: url("./../assets/auditorium.png") bottom center;
    background-size: cover;
  }
  
  body,html {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
  }
  
  .keys {
    display: flex;
    flex: 1;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
  }
  
  .key {
    border: .4em solid #e5e;
    border-radius: .5em;
    margin: 1em;
    font-size: 1.5em;
    padding: 1em .5em;
    transition: all .25s ease;
    width: 10em;
    text-align: center;
    color: #a9a;
    background: rgba(238,85,238,0.4);
    text-shadow: 0 0 .5em #e5e;
  }
  
  .playing {
    transform: scaleY(1.1) rotateZ(2deg);
    border-color: #f2f;
    box-shadow: 0 0 1em #f2f;
  }
  
  kbd {
    display: block;
    font-size: 4em;
  }
  
  .sound {
    font-size: 1em;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: #111;
  }