head.html

<head>
    <link rel="stylesheet" href="github-markdown.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.11.0/styles/default.min.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.8.3/katex.min.css">
    
    <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-MML-AM_CHTML'></script>
    <script type="text/x-mathjax-config">
        MathJax.Hub.Config({
            tex2jax: {
              inlineMath: [ ['$','$'], ['\\(','\\)'] ]
            }
          });
    </script>
</head>
<body class="markdown-body"></body>
<style>
        .markdown-body {
            box-sizing: border-box;
            min-width: 200px;
            max-width: 980px;
            margin: 0 auto;
            padding: 45px;
        }
    
        @media (max-width: 767px) {
            .markdown-body {
                padding: 15px;
            }
        }
</style>
    