.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";
  inset-block-start: 0;
  inset-inline-start: 0;
  inline-size: 100%;
  text-align: center;
  z-index: 1;

  &__title,
  &__tagline,
  &__icons,
  &__nav {
    background-color: $light;
    margin: 0;
  }

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

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

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

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

  &__nav {
    grid-area: header-nav;
    margin: auto;
    inline-size: 100%;

    @include mq("large") {
      inline-size: 60%;
    }

    & ul {
      margin-block: 0;

      & li {
        inline-size: calc(100% / 3);
        display: block;
        float: inline-start;
        border-block-end: 2px solid black;
        border-inline: 1px solid black;
        padding: 0.4em;
        background-color: inherit;

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

        & a {
          inline-size: 100%;
          block-size: 100%;
          display: block;
        }
      }

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

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