@media screen and (max-width: 480px) {
  header {
    font-size: 0.75em;
  }
  
  section, article, nav, footer {
    min-width: 320px;
    max-width: 480px;
  }

  article h1, article h2, article h3, article p, article table {
    padding-left: 15px;
    padding-right: 15px;
    text-align: left;
  }
  
  article ul, article ol {
    padding-left: 35px;
    padding-right: 10px;
    text-align: left;
  }
  
  article table {
    font-size: 0.5em;
  }
  
  article table td {
    padding-left: 0.25em;
    padding-right: 0.25em;
  }
  
  article img {
    max-width: 100%;
    margin-bottom: 1em;
  }
  
  #prev {
    margin-left: 1em;
  }
  
  #next {
    margin-right: 1em;
  }
  
  footer {
    padding-left: 0;
    padding-right: 0;
  }
}