body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  header {
    background-color: #222;
    color: white;
    padding: 10px 20px;
  }
  
  .logo {
    height: 50px;
  }
  
  .nav-menu {
    list-style-type: none;
    display: flex;
    gap: 15px;
    padding: 0;
  }
  
  .nav-menu li a {
    color: white;
    text-decoration: none;
  }
  
  main {
    padding: 20px;
  }
  
  footer {
    text-align: center;
    background-color: #eee;
    padding: 10px;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
  }
  
  table, th, td {
    border: 1px solid #999;
    padding: 8px;
    text-align: center;
  }