body {
    display: flex;
    flex-direction: column;
    margin: 0;
  }
  
  .sidebar {
    width: 250px;
    background: #111;
    position: fixed;
    top: 0;
    bottom: 0;
    left: -250px;
    transition: all 0.3s;
    color: #fff;
    padding: 10px;
    z-index: 1000;
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .sidebar h2,
  .sidebar a {
    color: #fff;
  }
  
  .content {
    margin-left: 0;
    transition: margin-left 0.3s;
    padding: 20px;
    width: 100%;
    flex: 1;
  }
  
  .content.shift {
    margin-left: 250px;
  }
  
  .hamburger {
    font-size: 30px;
    cursor: pointer;
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1001;
    color: #ffffff;
  }