.top-container {
    background-color: #f1f1f1; 
    padding: 20px;
    text-align: center;
  }
  
  .header {
    padding: 10px 16px;
    background: #555;
    color: #f1f1f1;
  }
  
  .content {
    padding: 16px;
  }
  
  .sticky {
    position: fixed;
    top: 0;
    width: 100%;
  }
  
  .sticky + .content {
    padding-top: 90px;
  }