/* Basisstijl */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: Arial, sans-serif;
      line-height: 1.6;
      background-color: #f4f4f4;
      color: #333;
    }

    header {
      background-color: #0077cc;
      color: white;
      padding: 20px;
      text-align: center;
    }

    nav {
      background-color: #eee;
      padding: 10px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    nav a {
      text-decoration: none;
      color: #0077cc;
      padding: 8px 16px;
      border: 1px solid #0077cc;
      border-radius: 4px;
    }

    nav a:hover {
      background-color: #0077cc;
      color: white;
    }

    .container {
      display: grid;
      grid-template-columns: 1fr 3fr;
      gap: 20px;
      padding: 20px;
    }

    aside {
      background-color: #fff;
      padding: 15px;
      border-radius: 6px;
    }

    main {
      background-color: #fff;
      padding: 15px;
      border-radius: 6px;
    }

    footer {
      background-color: #0077cc;
      color: white;
      text-align: center;
      padding: 15px;
      margin-top: 20px;
    }

    /* Responsiveness */
    @media (max-width: 1024px) {
      .container {
        grid-template-columns: 1fr;
      }

      nav {
        flex-direction: column;
        align-items: stretch;
      }
    }

    @media (max-width: 480px) {
      header, footer {
        padding: 10px;
      }

      nav a {
        padding: 6px 12px;
      }
    }