a {
      text-decoration: none;
      color: #666;
    }
    a:active {
      color: #666;
    }
    footer {
      position: fixed;
      width: 100%;
      bottom: 0;
      text-align: center;
      background-color: #f4f5f6;
      padding: 12px;
    }
    footer a {
      margin: 0 6px;
    }
    main {
      text-align: center;
      font-size: 48px;
      color: #666;
      margin-top: 120px;
    }