html, body {
    margin: 0;
    padding: 0;
  }
  body { 
    font: 62.5% Arial, Verdana, sans-serif; 
  } 
  #container {
    font-size: 1.2em;
    margin: 10px 2em;
  }
  
  h1 { 
    font-size: 2.5em; 
    margin-bottom: 0; 
  } 
  h2 { 
    font-size: 1.3em; 
    margin-bottom: .5em; 
  } 
  h3 { 
    font-size: 1.1em; 
    margin-bottom: 0; 
  } 
  .button {
    cursor: pointer;
    width: 100px;
    text-align: center;
    padding: 5px;
    margin-top: 1em;
    background-color: #fff;
    border-top: 3px solid #888;
    border-left: 3px solid #888;
    border-bottom: 3px solid #444;
    border-right: 3px solid #444;
  }
  
  .log {
    margin-top: 1em;
    border: 1px solid #888;
    padding: 5px;
  }