* {
    box-sizing: border-box;
  }
  
  body {
    font-family: Verdana, Geneva, sans-serif;
    color: #FFF;
    background-image: url("N5DKJ-logos_dark_grey_small.png");
    background-repeat: repeat;
    background-color: #000;
    padding: 0%;
  }
  
  header, nav {
    border-radius: 9px;
    position: relative;
    margin: 1%;
    /* background: linear-gradient(to left, #333, #555); */
  }

  header {
    display: inline-block;
    width: 98%;
    text-align: center;
    background-image: url("books.jpg");
    background-repeat: repeat-x;
    background-color: #555;
  }
  
  nav {
    float: left;
    width: 18%;
    max-width: 210px;
    text-align: left;
    background: linear-gradient(to left, #333, #555);
  }
  
  article {
    float: left;
    width: 78%;
    margin: 1%;
  }
  
  /* Clear floats after the columns */
  section::after {
    content: "";
    display: table;
    clear: both;
  }
  
  /* Style the footer */
  footer {
    background-color: #777;
    text-align: center;
    color: white;
  }

  h1 {
    font-size: 5em;
    font-weight: normal;
    margin-top: 0.1em;
    margin-bottom: 0.1em;
  }

  h2 {
    font-size: 3em ;
    font-weight: normal;
    margin-top: 0.1em;
    margin-bottom: 0.1em;
  }

  h3 {
    font-size: 2.5em ;
    font-weight: normal;
    margin-top: 0.1em;
    margin-bottom: 0.1em;
    text-align: center;
  }

  h4 {
    font-size: 2em ;
    font-weight: normal;
    margin-top: 0.1em;
    margin-bottom: 0.1em;
    text-align: center;
  }

  h5 {
    font-size: 1.5em ;
    font-weight: normal;
    margin-top: 0.1em;
    margin-bottom: 0.1em;
  }

  h6 {
    font-size: 1.25em ;
    font-weight: normal;
    margin-top: 0;
    margin-bottom: 0;
  }

  ul {
    margin-top: 0;
    margin-bottom: 0;
  }

  nav ul {
    list-style-type: none;
    margin: 1%;
    padding: 1%;
  }
  
  nav li {
    font-family:Verdana, Geneva, sans-serif;
    font-size:24pt;
  }
  
  @media (max-width: 600px) {
    nav, article {
      width: 100%;
      height: auto;
    }
  }

  input.input_button {
    background: #000 url('dragonbutton.png') no-repeat top left;
    color: #fff;
    font-size: 2em;
    height: 50px;
    width: 200px;
  }

  a { color:#988; } 
  a:visited { color:#A99; } 
  a:active { color:#BAA; }
  a:hover { color:#BBB; } 

  .welcome {
    display: inline;
  }

  .aboutme {
    display: none;
  }

  .resume {
    display: none;
  }

  .personal_projects {
    display: none;
  }

  @media (prefers-color-scheme: light) {
    body {
        color: #000;
        background-image: url("N5DKJ-logos_light_grey_small.png");
        background-repeat: repeat;
        background-color: #FFF;
    }
    header {
      color: #eee;
      background-image: url("books.jpg");
      background-repeat: repeat-x;
      background-color: #555;
    }
    nav {
      background: linear-gradient(to left, #aaa, #ccc);
    }
    input.input_button {
      background: #000 url('dragonbuttonlight.png') no-repeat top left;
      color: #000;
    }
  }