custom.css

<style>
    div.cell{
        //width: 950px;
        margin-left: 0% !important;
        margin-right: auto;
    }
    div.text_cell_render{
        line-height: 130%;
        font-size: 110%;
    }
    div.text_cell code {
   }    
    h1 {
        font-family: Arial, Helvetica, sans-serif;
	}

    div.input_area {
        background: #F6F6F9;
        border: 1px solid #586e75;
    }

    .text_cell_render h1 {
        font-weight: bold;
        font-size: 32pt;
        line-height: 100%;
        color: #357FAA;
        margin-bottom: 0em;
        display: block;
        white-space: wrap;
        text-align: left;
    }
    h2 {
        font-family: Arial, Helvetica, sans-serif;
        text-align: left;
    }
    .text_cell_render h2 {
        font-weight: bold;
        font-size: 25pt;
        line-height: 100%;
        color: #357FAA;
	margin-bottom: 0em;
        margin-top: 0.3em;
        display: block;
        white-space: wrap;
        text-align: left;
    }
    h3 {
        font-family: Arial, Helvetica, sans-serif;
    }
    .text_cell_render h3 {
        font-size: 19pt;
        line-height: 100%;
        color: #357FAA;
        margin-bottom: 0.5em;
        margin-top: 0.5em;
        display: block;
        white-space: wrap;
        text-align: left;
    }
    h4 {
        font-family: Arial, Helvetica, sans-serif;-serif;
    }
    .text_cell_render h4 {
        font-weight: 100;
        font-size: 16pt;
        color: #357FAA;
        margin-bottom: 0.5em;
        margin-top: 0.5em;
        display: block;
        white-space: nowrap;
    }
    h5 {
        font-family: Arial, Helvetica, sans-serif;
    }

    .text_cell_render h5 {
        font-weight: 200;
        font-style: normal;
        color: #357FAA;
        font-size: 14pt;
        margin-bottom: 0em;
        margin-top: 0.5em;
        display: block;
        white-space: nowrap;
    }
    div.output_subarea.output_text.output_pyout {
        overflow-x: auto;
        overflow-y: visible;
        max-height: 5000000px;
    }
    div.output_subarea.output_stream.output_stdout.output_text {
        overflow-x: auto;
        overflow-y: visible;
        max-height: 5000000px;
    }
    div.output_wrapper{
        margin-top:0.2em;
        margin-bottom:0.2em;
    }
    a:link{
       color:#447adb;
    }
    a:visited{
       color: #1d3b84;
    }
    a:hover{
       color: #1d3b84;
    }
    a:focus{
       color:#447adb;
    }
    a:active{
       font-weight: bold;
       color:#447adb;
    }
    .rendered_html :link {
       text-decoration: underline;
    }
    .rendered_html :hover {
       text-decoration: none;
    }
    .rendered_html :visited {
      text-decoration: none;
    }
    .rendered_html :focus {
      text-decoration: none;
    }
    .rendered_html :active {
      text-decoration: none;
    }
    hr {
      color: #f3f3f3;
      background-color: #f3f3f3;
      height: 1px;
    }
    div.exercise {    
    background-color: #eaf2f6;
    border-color: #357FAA;
    border-left: 5px solid #357FAA;
    padding: 1em 1em 2em 1em;
    }
    div.license {    
    margin-top: 30px;
    margin-bottom: 30px;
    color: rgba(76, 114, 29, 0.8);
    border:1px solid rgba(76, 114, 29, 0.2);
    background: rgba(76, 114, 29, 0.1);
    border-radius: 5px;
    padding: 1.1em 1.1em 1.1em 1.1em;
    }
   
</style>
<script>
    MathJax.Hub.Config({
                        TeX: {
                           extensions: ["AMSmath.js"],
                           equationNumbers: { autoNumber: "AMS", useLabelIds: true}
                           },
                tex2jax: {
                    inlineMath: [ ['$','$'], ["\\(","\\)"] ],
                    displayMath: [ ['$$','$$'], ["\\[","\\]"] ]
                },
                displayAlign: 'center', // Change this to 'center' to center equations.
                "HTML-CSS": {
                    scale: 95,
                        availableFonts: [],
                        preferredFont:null,
                        webFont: "TeX",
                    styles: {'.MathJax_Display': {"margin": 4}}
                },
                 "fast-preview": {
                    "disabled": false
                }
        });
</script>