nav {
  width: 100vw;
  height: 3rem;
  box-sizing: border-box;
  position: fixed;
  bottom: 0;
  transition: background-color 500ms, all 300ms;
  overflow: hidden;
  font-size: 1.25rem;
  text-align: center;
  background-color: var(--tertiary-color);
  border-top: 1px solid var(--tertiary-color);
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 100;
  box-shadow: 0px -5px 20px -20px var(--primary-color),
              0px -5px 10px -10px #000;
}

.night nav {
  border-top: 1px solid var(--background-light);
}

nav.open {
  background-color: rgba(255, 255, 255, 0.9);
  height: 100vh;
  border-top: 0px;
}

nav.open .nav-current {
  display: none;
}

nav.open .toggle-container {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}

nav .nav-links, nav .toggle-container {
  display: none;
  overflow: hidden;
}

nav .sun-and-moon {
  position: fixed;
  top: 0.5rem;
  right: 0.5rem;
}

nav.open > .nav-links {
  display: block;
}

nav .nav-close {
  display: none;
  position: fixed;
  width: 100%;
  bottom: 1rem;
}

nav.open .nav-close {
  display: block;
}

nav img {
  margin-bottom: 1rem;
}

nav .nav-current, nav.open .nav-close {
  cursor: pointer;
}

nav a, nav .nav-current-title, nav .nav-close {
  color: var(--text-color-light);
}

nav.open a, nav.open .nav-current-title, nav.open .nav-close {
  color: var(--primary-color);
}

.night nav.open a, .night nav .nav-current-title, .night nav .nav-close {
  color: var(--text-color-light);
  background-color: var(--tertiary-color);
}

.night nav, .night nav.open, .night nav .nav-close {
  background-color: var(--tertiary-color);
  color: var(--text-color-light);
}

nav a, nav .nav-current-title {
  display: block;
  text-decoration: none;
  transition: background-color 300ms, color 300ms;
  padding: 0.5rem;
  height: 2.5rem;
  line-height: 1.5rem;
}

nav .nav-current-title span {
  position: relative;
  bottom: 0.3rem;
}

nav .menu-icon {
  fill: var(--text-color-light);
  display: inline;
  height: 1.6rem;
  width: 1.6rem;
  margin-right: 0.25rem;
}

nav > .nav-links > a:hover, nav > .nav-links > a.active {
  background-color: var(--tertiary-color);
  color: var(--text-color-light);
}

.night nav > .nav-links > a.active {
  background-color: var(--background-light);
  color: var(--background-dark);
}

.night nav > .nav-links > a:hover {
  background-color: var(--deep-background-color);
  color: var(--text-color-dark);
}

nav .nav-links a.external-link:hover::after {
  position: relative;
}

.night nav > .nav-links > a.external-link::after {
  position: relative;
}

nav .nav-links a.external-link:hover span:after {
  background-image: url(/icons/external-link-icon-light.png);
}

@media only screen and (min-width : 800px) {
  nav {
    background-color: var(--background-light);
    box-shadow: -15px -15px 10px 10px var(--primary-color),
                -5px -5px 10px 0px #000;
    border-right: 1px solid var(--primary-color);
    border-top: 0px !important;
    height: 2.5rem;
    width: 280px;
    top: 0;
  }

  .night nav {
    border-right: 1px solid var(--background-light);
  }

  .scrolled nav:not(.open) {
    border-bottom: 1px solid var(--primary-color);
  }

  .night nav:not(.open) {
    border-bottom: 1px solid var(--background-light);
  }

  .scrolled nav, nav.open {
    background-color: var(--background-light);
  }

  nav > .nav-close {
    width: 279px;
    display: none;
  }

  nav > .nav-links, nav.open .sun-and-moon {
    display: none;
  }

  .scrolled nav {
    height: 2.5rem;
  }

  .scrolled nav.open {
    height: 100vh;
  }

  .scrolled nav.open .nav-close {
    display: block;
  }

  .scrolled .nav-current {
    display: block;
  }

  nav a, nav .nav-current-title, nav .nav-close {
    color: var(--primary-color);
  }

  .night nav a, .night nav .nav-current-title, .night nav .nav-close {
    color: var(--background-light);
  }

  nav .menu-icon {
    fill: var(--primary-color);
  }

  .night nav .menu-icon {
    fill: var(--background-light);
  }

  .richtext-img {
    max-width: calc(var(--content-width) / 2);
  }
}

@media only screen and (min-width : 1360px) {
  nav {
    height: 100vh;
  }

  nav > .nav-close {
    display: none;
  }

  nav > .nav-current {
    display: none;
  }

  nav > .nav-links {
    display: block;
  }

  body.night:not(.scrolled) nav:not(.open) {
    border-bottom: 0px;
  }
}