.sidenav {
  height: 100vh;
  width: 250px;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: #ffffff;
  border-right: 1px solid #818181;
  overflow-x: hidden;
  padding-top: 2em;
}

.sidenav header {
  padding: 6px 8px 6px 16px;
  font-size: 1.5em;
  font-weight: bold;
}

.sidenav a {
  padding: 6px 8px 16px 16px;
  text-decoration: none;
  font-size: 1.1em;
  color: #818181;
  display: block;
  border-top: 1px solid #818181;
}

.sidenav a:hover {
  color: #f1f1f1;
}

#ref-bottom {
  padding: 6px 8px 16px 16px;
  position: absolute;
  bottom: 10px;
  left: 10px;
  text-align: center;
}

#ref-bottom a {
  color: blue;
  border: none;
}

.main {
  margin-left: 250px;
  /* Same as the width of the sidenav */
  font-size: 1.25em;
  /* Increased text to enable scrolling */
  padding: 2em;
  height: 1000vh;
}

.main h2 {
  font-weight: bold;
}

.main {
  font-size: 1em;
}

.main header {
  font-size: 1.25em;
  font-weight: bold;
}

code {
  display: block;
  white-space: pre-wrap;
  width: 80%;
  background-color: #f3f3f3;
  font-size: 0.7em;
  padding: 2em;
  margin-bottom: 1em;
  border-left: 3px solid blue;
}

@media screen and (max-height: 450px) {
  .sidenav {
    padding-top: 15px;
  }

  .sidenav a {
    font-size: 18px;
  }
}