custom1.css

<style>
@import url('http://fonts.googleapis.com/css?family=Source+Code+Pro');
@import url('http://fonts.googleapis.com/css?family=Vollkorn');
@import url('http://fonts.googleapis.com/css?family=Arimo');
@import url('http://fonts.googleapis.com/css?family=Fira_sans');
    
    div.cell {
        width: 1000px;
        margin-left: 0% !important;
        margin-right: auto;
    }
    div.text_cell code {
        background: transparent;
        color: #000000;
        font-weight: 600;
        font-size: 12pt;
        font-style: bold;
        font-family:  'Source Code Pro', Consolas, monocco, monospace;
    }
    h1 {
        font-family: 'Open sans',verdana,arial,sans-serif;
	}
	
    div.input_area {
        background: #F6F6F9;
        border: 1px solid #586e75;
    }

    .text_cell_render h1 {
        font-weight: 200;
        font-size: 30pt;
        line-height: 100%;
        color:#c76c0c;
        margin-bottom: 0.5em;
        margin-top: 1em;
        display: block;
        white-space: wrap;
        text-align: left;
    } 
    h2 {
        font-family: 'Open sans',verdana,arial,sans-serif;
        text-align: left;
    }
    .text_cell_render h2 {
        font-weight: 200;
        font-size: 16pt;
        font-style: italic;
        line-height: 100%;
        color:#c76c0c;
        margin-bottom: 0.5em;
        margin-top: 1.5em;
        display: block;
        white-space: wrap;
        text-align: left;
    } 
    h3 {
        font-family: 'Open sans',verdana,arial,sans-serif;
    }
    .text_cell_render h3 {
        font-weight: 200;
        font-size: 14pt;
        line-height: 100%;
        color:#d77c0c;
        margin-bottom: 0.5em;
        margin-top: 2em;
        display: block;
        white-space: wrap;
        text-align: left;
    }
    h4 {
        font-family: 'Open sans',verdana,arial,sans-serif;
    }
    .text_cell_render h4 {
        font-weight: 100;
        font-size: 14pt;
        color:#d77c0c;
        margin-bottom: 0.5em;
        margin-top: 0.5em;
        display: block;
        white-space: nowrap;
    }
    h5 {
        font-family: 'Open sans',verdana,arial,sans-serif;
    }
    .text_cell_render h5 {
        font-weight: 200;
        font-style: normal;
        color: #1d3b84;
        font-size: 16pt;
        margin-bottom: 0em;
        margin-top: 0.5em;
        display: block;
        white-space: nowrap;
    }
    div.text_cell_render{
        font-family: 'Fira sans', verdana,arial,sans-serif;
        line-height: 125%;
        font-size: 115%;
        text-align:justify;
        text-justify:inter-word;
    }
    div.output_wrapper{
        margin-top:0.2em;
        margin-bottom:0.2em;
    }

    code{
      font-size: 70%;
    }
    .rendered_html code{
    background-color: transparent;
    }
    ul{
        margin: 2em;
    }
    ul li{
        padding-left: 0.5em; 
        margin-bottom: 0.5em; 
        margin-top: 0.5em; 
    }
    ul li li{
        padding-left: 0.2em; 
        margin-bottom: 0.2em; 
        margin-top: 0.2em; 
    }
    ol{
        margin: 2em;
    }
    ol li{
        padding-left: 0.5em; 
        margin-bottom: 0.5em; 
        margin-top: 0.5em; 
    }
    ul li{
        padding-left: 0.5em; 
        margin-bottom: 0.5em; 
        margin-top: 0.2em; 
    }
    a:link{
       font-weight: bold;
       color:#447adb;
    }
    a:visited{
       font-weight: bold;
       color: #1d3b84;
    }
    a:hover{
       font-weight: bold;
       color: #1d3b84;
    }
    a:focus{
       font-weight: bold;
       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;
    }
    .warning{
        color: rgb( 240, 20, 20 )
    } 
    hr {
      color: #f3f3f3;
      background-color: #f3f3f3;
      height: 1px;
    }
    blockquote{
      display:block;
      background: #fcfcfc;
      border-left: 5px solid #c76c0c;
      font-family: 'Open sans',verdana,arial,sans-serif;
      width:680px;
      padding: 10px 10px 10px 10px;
      text-align:justify;
      text-justify:inter-word;
      }
      blockquote p {
        margin-bottom: 0;
        line-height: 125%;
        font-size: 100%;
      }
</style>
<script>
    MathJax.Hub.Config({
                        TeX: {
                           extensions: ["AMSmath.js"]
                           },
                tex2jax: {
                    inlineMath: [ ['$','$'], ["\\(","\\)"] ],
                    displayMath: [ ['$$','$$'], ["\\[","\\]"] ]
                },
                displayAlign: 'center', // Change this to 'center' to center equations.
                "HTML-CSS": {
                    scale:100,
                        availableFonts: [],
                        preferredFont:null,
                        webFont: "TeX",
                    styles: {'.MathJax_Display': {"margin": 4}}
                }
        });
</script>