nav {
  font-family: Roboto, sans-serif;

  display: flex;
  /* background-color: #333333; */
  background-color: #00ADEF;

  height: 3em;
  line-height: 3em;

  width: 100%;
  clear: both;

  padding: 0 2em;
  position: sticky;
  position: -webkit-sticky;
  top: 0;
  z-index: 10;
}

nav a {
  display: block;
  flex: 1;

  white-space: nowrap;

  text-align: center;
  margin: 0;

  font-weight: bold;
  font-size: 14px;

  text-transform: uppercase;
  text-shadow: 1px 1px 1px rgba(0,0,0,0.3);

  color: white;
}

nav a:hover {
  color: #ddd;
}

nav a.active {
  background-color: #00A5E4;
}

nav #toggle {
  display: none;
}

@media (max-width: 1000px) {
  body > nav {
    display: block;
    height: auto;
    min-height: 3.1em;
    padding: 0;
  }

  body > nav label[for="toggle"] {
    position: absolute;
    top: 0;
    right: 0.5em;

    font-weight: bold;
    font-size: 2em;

    color: #f1f1f1;
    cursor: pointer;
  }

  body > nav #toggle:not(:checked) ~ .toggleable {
    position: absolute;
    top: -1000px !important;
    display: none;
    clear: both;
  }
}