* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: "Source Sans Pro", sans-serif;
  }
  
  .split {
    height: 100%;
    position: fixed;
    z-index: 1;
    top: 0;
    overflow-x: hidden;
    overflow-y: hidden;
  }
  .left {
    left: 0;
    background-color: #282a36;
    width: 30%;
    height: 100%;
    display: flex;
    flex-direction: column;
  }
  
  .left-1 {
    flex: 0 0 auto;
    padding: 10px;
    background-color: rgb(46, 46, 46);
  }
  
  .left-2 {
    flex: 1;
    overflow-y: auto;
    background-color: #282a36;
    font-family: "Source Code Pro", monospace;
  }
  
  .left-3 {
    height: 20px;
    padding: 3px;
    font-size: 10px;
    background-color: #353741;
    color: white;
  }
  
  .right {
    right: 0;
    width: 70%;
  }
  
  .right-topleft {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 60px;
    height: 60px;
    padding: 10px;
  }