* {
    box-sizing: border-box;
  }
  
  html {
    height: 100%;
  }
  
  body {
    margin: 0;
    padding: 0;
    font-family: menlo, monospace;
    font-size: 13px;
    position: relative;
    height: 100%;
    width: 100%;
    min-height: 260px;
  }
  
  pre {
    border: 1px solid #DDD;
    position: absolute;
    top: 14px;
    bottom: 0px;
    left: 10px;
    right: 10px;
    padding: 4px;
    overflow: auto;
    font-size: 12px;
    white-space: pre-wrap;
  }
  
  .cell {
    position: absolute;
    padding: 10px;
    height: 40%;
    min-height: 100px;
  }
  
  .full {
    height: auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
  }
  
  .cell > h4 {
    position: absolute;
    top: 10px;
    line-height: 1;
    margin: 0;
  }
  
  .top-left {
    top: 0;
    left: 0;
    width: 33.3333%;
  }
  
  .top-center {
    top: 0;
    left: 33.3333%;
    width: 33.3333%;
  }
  
  .top-right {
    top: 0;
    right: 0;
    width: 33.3333%;
  }
  
  .bottom {
    top: 40%;
    right: 0;
    left: 0;
    bottom: 0;
    height: 60%;
  }
  
  /* Dark theme ----------------------------------------- */
  body.dark {
    background: rgb(27, 27, 27);
    color: #CCC;
  }
  
  body.dark pre {
    border-color: #444;
    background: #222;
    color: #999;
  }