style.css

      @import url(https://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700,400italic);
      @import url(https://fonts.googleapis.com/css?family=Alegreya+Sans+SC:700|Work+Sans);
      @import url('https://fonts.googleapis.com/css?family=Crimson+Text:600,600i');

      body { font-family: 'Work Sans', sans-serif; }
      h1, h2, h3 {
          margin-top:0px;
          margin-bottom: 5px;
        font-family: 'Alegreya Sans SC', sans-serif;
        font-weight: normal;
      }
      p {
          margin-top: 0px;
          margin-bottom: 5px;
      }
      .remark-notes {
          font-size: 125%;
      }
      .remark-slide-content {
          font-size: 35px;
          background: #f3f3f3;
      }
      .remark-slide-content h1 {
          font-size: 110px;
      }
      .remark-slide-content h2 {
          font-size: 65px;
      }
      .remark-slide-content h3 {
          font-size: 45px;
      }
      .remark-code, .remark-inline-code {
           font-family: 'Ubuntu Mono';
            text-align: left;
            display: inline-block;
            font-size: 26px;
            background-color: white;
            padding: 10px;
       }
       .remark-inline-code {
           font-size: 32px; 
       }
       .remark-code-line {
            min-height: 0px;
       }
       pre {
            padding: 5px;
           margin: 5px;
       }
       .padded-top {
           padding-top: 80px;
       }
       .padded-top2 {
           padding-top: 160px;
       }
       blockquote {
           font-family: "Crimson Text", serif;
           font-size: 60px;
        font-style: italic;
       }
       a, a.visited {
           color: black;
           text-decoration: none;
       }
       .demo {
            color: white;
            background: black;
       }
       .section-title {
           color: white;
           background: midnightblue;
       }
       .lesson > h1, .solution > h1 {
        font-size: 60px;
       float:left;
        width:100%;
        padding-bottom: 0px;
        margin-bottom: 20px;
       }
       .lesson > h1 {
         color: darkred;
         border-bottom:1px solid darkred;
       }
       .solution > h1 {
         color: darkgreen;
         border-bottom:1px solid darkgreen;
       }
       .lesson > h2, .solution > h2 {
         margin-top: 50px;
       }
      .left-column {
        width: 50%;
        float: left;
      }
      .right-column {
        width: 50%;
        float: right;
    }
      .black-text {
          color: black;
      }