* {
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    body {
      margin: 0;
      padding: 20px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: #333;
      line-height: 1.6;
    }
    .container {
        max-width: 800px;
        margin: 0 auto;
    }
    main.container {
        padding: 40px;
      background: #fff;
      border-radius: 10px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    }
    h1 {
      color: #667eea;
      margin-bottom: 30px;
    }
    h2 {
      color: #764ba2;
      margin-top: 30px;
      border-bottom: 2px solid #e0e0e0;
      padding-bottom: 10px;
    }
    h3 {
      color: #667eea;
    }
    h4 {
      color: #764ba2;
    }
    p, li {
      font-size: 16px;
    }
    code {
      background: #f4f4f4;
      padding: 2px 6px;
      border-radius: 4px;
      font-family: 'Courier New', monospace;
      color: #d73a49;
    }
    pre {
      background: #f4f4f4;
      padding: 15px;
      border-radius: 8px;
      overflow-x: auto;
      border-left: 5px solid #667eea;
    }
    ul, ol {
      padding-left: 20px;
    }
    .highlight {
      background: #e6f7ff;
      padding: 10px;
      border-radius: 8px;
      margin: 20px 0;
    }
    table {
      width: 100%;
      border-collapse: collapse;
      margin: 20px 0;
    }
    th, td {
      border: 1px solid #ddd;
      padding: 8px;
      text-align: left;
    }
    th {
      background-color: #f2f2f2;
    }
    form {
      margin: 20px 0;
    }
    label {
      display: block;
      margin-bottom: 5px;
    }
    input, textarea {
      padding: 8px;
      margin-bottom: 10px;
      width: 100%;
    }
    footer {
      text-align: center;
      margin-top: 40px;
      color: #666;
    }
    .site {
      margin-bottom: 20px;
    }
    .site-name {
      font-size: 24px;
      margin-bottom: 10px;
      color:#f9f9f9;
    }
    .site-name img {
      height: 30px;
      vertical-align: middle;
      margin-right: 10px;
    }
    nav ol {
      list-style: none;
      padding: 0;
    }
    nav ol li {
      display: inline;
      margin-right: 10px;
    }
    article header {
      margin-bottom: 20px;
    }
    article footer {
      text-align: center;
      margin-top: 40px;
    }
    header.site nav a {
      text-decoration: none;
      color: #f9f9f9;
    }

    img { 
        max-width: stretch;
        max-width: -moz-available;
        max-width: -webkit-fill-available;
    }