Cataloguer/assets/css/layout/_header.scss

.site-header {
  display: grid;
  grid-area: header;
  grid-gap: 0;
  grid-template-columns: 1fr;
  grid-template-rows: auto auto auto auto;
  grid-template-areas: "header-title" "header-tagline" "header-icons" "header-nav";
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  text-align: center;
  z-index: 1;
  
  &__title,
  &__tagline,
  &__icons,
  &__nav {
    background-color: $light;
    margin: 0;
  }

  &__title,
  &__tagline,
  &__icons {
    padding: 5px 0;
  }

  &__title {
    font-weight: normal;
    grid-area: header-title;
  }

  &__tagline {
    grid-area: header-tagline;
  }

  &__icons {
    grid-area: header-icons;
    border-bottom: 2px solid $dark;
    margin-bottom: 0;
  }

  &__nav {
    grid-area: header-nav;
    margin: auto;
    width: 100%;
    @include mq('desktop') {
      width: 60%;
    }

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

    & li {
      width: calc(100% / 4);
      display: block;
      float: left;
      border-bottom: 2px solid black;
      border-left: 1px solid black;
      border-right: 1px solid black;
      padding: 0.4em;
      background-color: inherit;
    }

    & a:first-child li {
      border-left: 2px solid black;
    }

    & a:last-child li {
      border-right: 2px solid black;
    }

    & li {
      &:hover {
        background-color: #ffffd0;
      }

      & a {
        width: 100%;
        height: 100%;
        display: block;
      }
    }
  }
}