style.css

body {
    background: #fff;
    color: #555;
    font-size: 18px;
    line-height: 1.4;
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  nav {
    border-bottom: 1px solid #eee;
    height: 60px;
  }
  
  h1.subject {
    box-sizing: border-box;
    color: #404050;
    font-size: 20px;
    height: 60px;
    line-height: 40px;
    margin: 0 auto;
    max-width: 1000px;
    padding: 10px;
  }
  
  h1.subject img {
    display: block;
    float: left;
    height: 40px;
    margin-right: 10px;
    width: 40px;
  }
  
  h1.subject small {
    font-size: 0.6em;
  }
  
  section {
    box-sizing: border-box;
    max-width: 1000px;
    margin: 0 auto 5em auto;
    padding: 0 20px;
  }
  
  section.jumbotron {
    margin: 0 auto;
  }
  
  section.jumbotron img {
    display: block;
    width: 100%;
    margin: 0;
  }
  
  section h1 {
    text-align: center;
    margin: 0 0 2em 0;
    padding: 0.25em 0;
    border-bottom: 3px solid #ccc;
  }
  
  section h2 {
    margin: 1.5em 0 1em 0;
    padding: 0.25em 0;
    border-bottom: 1px solid #ccc;
  }
  
  section h3 {
    margin: 2em 0 1em 0;
  }
  
  a {
    color: #02669d;
    text-decoration: none;
  }
  
  a:hover {
    color: #003668;
  }
  
  hr {
    margin: 2.5em 0;
    height: 0;
    border: none;
    border-bottom: 3px solid #ccc;
  }