     h2 {
            font-size: 20px;
        }
        .subhead {
            font-size: 130%;
            font-weight: 500;
            color: #777;
        }
        .main-body {
            background: rgb(240, 247, 247);
            padding: 24px 26px 22px 26px;
            max-width: 600px;
            font-size: 16px;
            margin: 30px auto;
        }
        footer {
            padding: 20px 0;
        }
        .github-link {
            margin-top: 10px;
        }

        </style>
    </