body {
    font: 1.2em / 1.5 sans-serif;
  }
  * {
    box-sizing: border-box;
  }
  
  .container {
    height: 400px;
    padding: 0.5em;
    border: 5px solid #ccc;
    overflow: auto;
  }
  
  .sidebar {
    color: white;
    background-color: #663398;
    padding: 1em;
    float: left;
    width: 150px;
  }
  
  .content {
    padding: 1em;
    margin-left: 160px;
  }