discourse/app/assets/stylesheets/common/base/new-user.scss

.new-user-wrapper {
  margin-top: -15px; // temp, can remove margin from sibling element after nav finalized
  .user-navigation {
    --user-navigation__border-width: 4px;
    border-bottom: 1px solid var(--primary-low);

    .nav-pills {
      width: 100%;
      margin: 0;
      .d-icon {
        font-size: var(--font-down-1);
      }

      &.main-nav {
        @include breakpoint(medium) {
          li {
            .d-icon {
              font-size: var(--font-up-1);
              margin: 0;
            }
            span {
              display: none;
            }
          }
        }

        .has-sidebar-page & {
          @include breakpoint(large) {
            span {
              display: none;
            }
          }
        }
      }

      li {
        flex: 1 1 auto;
        margin: 0;
        display: flex;

        a {
          box-sizing: border-box;
          width: 100%;
          display: flex;
          justify-content: center;
          align-items: center;
          position: relative;
          border-bottom: var(--user-navigation__border-width) solid transparent;
          padding: calc(0.75em + var(--user-navigation__border-width)) 0.5em
            0.75em;
          transition: color 0.25s;

          @include breakpoint(extra-large) {
            font-size: var(--font-0);
          }

          span {
            line-height: normal;
            @include ellipsis;
          }

          &:hover,
          &:focus {
            background: transparent;
            color: var(--quaternary);
            border-bottom: var(--user-navigation__border-width) solid
              var(--quaternary-low);
          }

          &.active {
            color: var(--quaternary);
            background: transparent;
            border-bottom: var(--user-navigation__border-width) solid
              var(--quaternary);
          }
        }
      }
    }
  }

  .user-navigation-primary {
    [class*="horizontal-overflow-nav__scroll"] {
      font-size: var(--font-up-1);
      .d-icon {
        margin-top: 0.15em; // minor alignment
      }
    }
  }

  .user-navigation-secondary {
    --user-navigation__border-width: 2px;
    --navigation-secondary-padding-top: 0.5em;
    position: relative;
    display: flex;
    min-width: 0;
    margin: 0;
    gap: 0 0.5em;
    border-bottom: 1px solid var(--primary-low);

    .select-kit .select-kit-header {
      height: 100%;
      padding: 0.5em 1em;
    }

    .category-breadcrumb {
      padding-top: var(--navigation-secondary-padding-top);
      @include breakpoint(large) {
        font-size: var(--font-down-1);
      }
      > li {
        margin: 0;
      }
    }

    .navigation-controls {
      padding-top: var(--navigation-secondary-padding-top);
      flex-wrap: nowrap;
      @include breakpoint(large) {
        font-size: var(--font-down-1);
      }
    }

    .nav-pills {
      flex: 1 1 auto;
      font-size: var(--font-down-1);
      justify-content: flex-start;
      padding-top: var(--navigation-secondary-padding-top);

      li {
        flex: 1 0 auto;

        a {
          padding: 0.5em 0.5em
            calc(0.5em + var(--user-navigation__border-width));

          span {
            text-overflow: unset;
          }
        }
      }
    }

    [class*="horizontal-overflow-nav__scroll"] {
      padding-top: var(--navigation-secondary-padding-top);
    }
  }

  .user-nav-dropdown-button {
    background: transparent;
  }

  .user-nav-dropdown-submenu {
    background: var(--secondary);
    list-style-type: none;
    margin: 0;

    li a {
      padding: 0.5em 1em;
      color: var(--primary);

      .discourse-no-touch & {
        &:hover {
          background: var(--highlight-medium);
          color: currentColor;
        }
      }

      &.active {
        background: var(--tertiary-low);
        color: currentColor;
      }

      &:first-of-type {
        padding-top: 0.5em;
      }
      &:last-of-type {
        padding-bottom: 0.5em;
      }
    }
  }

  .empty-state {
    padding: 0;
    margin: 1em 0;
  }
}