body {
      margin: 0;
      padding: 0;
      background-color: #fff;
    }

    header {
      text-align: center;
      padding: 20px;
    }

    nav a {
      margin: 0 10px;
      text-decoration: none;
      color: #333;
    }

    main {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 20px;
    }

    .blog-image {
      max-width: 100%;
      height: auto;
      margin-bottom: 20px;
    }

    .folder {
      background-color: #f3f3f3;
      padding: 20px;
      max-width: 500px;
      width: 100%;
      margin-bottom: 30px;
      border-radius: 5px;
    }

    .folder h2 {
      margin-top: 0;
      color: #444;
      border-bottom: 1px solid #ccc;
      padding-bottom: 5px;
    }

    .folder ul {
      list-style: none;
      padding: 0;
    }

    .folder li {
      text-align: left;
      padding: 10px 0;
      border-bottom: 1px solid #ddd;
    }

    .folder a {
      color: #333;
      text-decoration: none;
    }

    .folder time {
      font-size: 0.8em;
      color: #777;
      margin-right: 10px;
    }

    footer {
      text-align: center;
      padding: 20px;
      border-top: 1px solid #ccc;
      margin-top: 40px;
    }