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

    body {
      font-family: sans-serif;
      background-color: #f8f9fa;
      color: #202122;
    }

    header {
      background-color: #fff;
      border-bottom: 1px solid #a2a9b1;
      display: flex;
      align-items: center;
      padding: 10px 20px;
    }

    header img {
      height: 40px;
      margin-right: 10px;
    }

    header h1 {
      font-size: 22px;
    }

    nav.topnav {
      background-color: #f8f9fa;
      border-bottom: 1px solid #ccc;
      display: flex;
      justify-content: space-between;
      padding: 8px 20px;
      font-size: 14px;
      flex-wrap: wrap;
    }

    nav.topnav a {
      color: #0645ad;
      text-decoration: none;
      margin-right: 15px;
      white-space: nowrap;
    }

    nav.topnav a:hover {
      text-decoration: underline;
    }

    .container {
      display: flex;
      flex-wrap: wrap;
    }

    aside.sidebar-left {
      flex: 0 0 200px;
      padding: 15px;
      background-color: #f2f2f2;
      border-right: 1px solid #ccc;
      font-size: 14px;
    }

    aside.sidebar-left h3 {
      margin-bottom: 8px;
      font-size: 16px;
      border-bottom: 1px solid #ccc;
    }

    aside.sidebar-left ul {
      list-style: none;
      margin-top: 10px;
    }

    aside.sidebar-left ul li {
      margin: 5px 0;
    }

    aside.sidebar-left ul li a {
      color: #0645ad;
      text-decoration: none;
    }

    aside.sidebar-left ul li a:hover {
      text-decoration: underline;
    }

    main {
      flex: 1;
      padding: 20px;
    }

    .sidebar-right {
      flex: 0 0 250px;
      background-color: #f8f9fa;
      border-left: 1px solid #ccc;
      padding: 10px;
      font-size: 14px;
    }

    .sidebar-right img {
      width: 100%;
      margin-bottom: 10px;
    }
    .sidebar-right figcaption {
      text-align: center;
      font-style: italic;
      margin-bottom: 20px;
      border: 1px #cccccc solid;
      
    }

    h3 {
      border-bottom: 1px solid #ccc;
      padding-bottom: 5px;
      margin-top: 20px;
      text-align: center;
    }



    footer {
      background-color: #eef1f3;
      text-align: center;
      padding: 10px;
      border-top: 1px solid #ece2e2;
      font-size: 12px;
      color: #a09f9f;
      margin-top: 10px;
    }

    /* Responsive */
    @media (max-width: 900px) {
      .container {
        flex-direction: column;
      }

      aside.sidebar-left,
      .sidebar-right {
        flex: 1 1 100%;
        border: none;
        margin-bottom: 10px;
      }
    }