.sidebar {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
  }
  
  .sidebar-content {
    padding: 16px;
    text-align: center;
    color: white;
  }
  
  .open-btn {
    position: absolute;
    top: 20px;
    left: 10px;
  }
  
  .main-content {
    transition: margin-left 0.5s;
    padding: 16px;
  }
  
  .main-content {
    margin-left: 250px;
  }