html {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 8px;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}





#viewer {
  display: inline-block;
  width: 100%;
  height: 100%;
  margin-top: 4px;
  margin-left: 0px;
  -webkit-box-shadow: 1px 1px 10px #999;
          box-shadow: 1px 1px 10px #999;
}

/* Header element in all pages */

/* Smaller screens */

@media (max-width: 800px) {
  header .menu {
    display: block;
  }

  aside {
    display: none;
    position: fixed;
    left: 0;
    background: white;
    box-shadow: 50px 0 50px rgba(0, 0, 0, 0.2);
  }

  #viewer {
    width: 100vw;
    margin-left: 0;
  }
}