/* Navigation, the reading column at its measure, and the outline, spread across the frame. */
.docs-frame {
  display: grid;
  grid-template-columns: 13rem minmax(0, var(--pmx-document-measure)) 13rem;
  justify-content: space-between;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
  padding-block: 2rem 5rem;
}

.docs-frame > .site-aside {
  grid-column: 3;
  grid-row: 1;
}
.docs-frame > .site-main {
  grid-column: 2;
  grid-row: 1;
}

/* The docs grid supplies the gutter around the reading column. */
.docs-frame > .site-main > :is(.pmx-document, .pmx-breadcrumbs) {
  margin-inline: 0;
  padding-inline: 0;
}

.docs-sidebar,
.site-menu-panel > .pmx-nav + .pmx-nav {
  font-size: 0.9rem;

  .pmx-nav-list {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .pmx-nav-list .pmx-nav-list {
    margin: 0.125rem 0 0.75rem 0.75rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--pmx-color-border);
  }

  .pmx-nav-item > .pmx-nav-link {
    position: relative;
    display: flex;
    align-items: center;
    box-sizing: border-box;
    min-height: 2.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    color: var(--pmx-color-muted);
    font-weight: 400;
    line-height: 1.4;
    text-decoration: none;

    &:hover {
      color: var(--pmx-color-fg);
      background: color-mix(in oklch, currentColor 6%, transparent);
    }

    &:focus-visible {
      outline: 2px solid var(--pmx-color-accent);
      outline-offset: 2px;
    }

    &[data-pmx-active="section"] {
      color: var(--pmx-color-fg);
    }

    &[aria-current="page"] {
      color: var(--pmx-color-accent);
      background: color-mix(in oklch, var(--pmx-color-accent) 12%, transparent);

      &::before {
        content: "";
        position: absolute;
        inset-block: 0.625rem;
        inset-inline-start: 0;
        width: 3px;
        border-radius: 2px;
        background: currentColor;
      }
    }
  }

  .pmx-nav > .pmx-nav-list > .pmx-nav-item > .pmx-nav-link {
    font-weight: 600;
  }

}

.docs-sidebar {
  position: sticky;
  top: var(--pmx-sticky-block-start);
  max-height: calc(100dvh - var(--pmx-sticky-block-start) - 1rem);
  overflow-y: auto;
  scrollbar-width: thin;
  padding: 3px;
}

.docs-footer {
  margin-top: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--pmx-color-border);
  font-size: 0.85rem;
}

.docs-footer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.docs-source-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--pmx-color-muted);
  text-underline-offset: 0.2em;
}

.docs-footer-related {
  margin-top: 1rem;

  &:not(:has(.pmx-graph-backlinks)) {
    display: none;
  }
}

.docs-footer-label {
  margin: 0 0 0.5rem;
  color: var(--pmx-color-muted);
  font-size: 0.8rem;
}

.docs-footer .pmx-graph-backlinks {
  margin: 0;

  ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
    gap: 0.5rem 1.5rem;
  }

  li {
    border: 0;
  }

  li > a {
    min-height: 2.75rem;
    padding-block: 0.5rem;
  }
}

@container site (max-width: 64rem) {
  .docs-frame {
    grid-template-columns: 12rem minmax(0, 1fr);
    row-gap: 1rem;
  }

  .docs-frame:has(.site-aside .pmx-toc) {
    grid-template-rows: min-content minmax(0, 1fr);
  }

  .docs-frame > .site-aside {
    grid-column: 2;
    grid-row: 1;
    z-index: 5;
    width: 100%;
    top: var(--pmx-viewport-inset-block-start);
    background: var(--pmx-color-bg);
    margin: 0;
  }
  .docs-frame > .site-main {
    grid-row: 2;
  }
  .docs-sidebar {
    grid-row: 1 / 3;
  }

  /* Section indexes have no TOC; do not reserve an empty grid row for it. */
  .docs-frame:not(:has(.site-aside .pmx-toc)) {
    > .site-aside {
      display: none;
    }

    > .site-main,
    > .docs-sidebar {
      grid-row: 1;
    }
  }

}

@container site (max-width: 52rem) {
  .docs-frame {
    display: block;
    padding-top: 1.5rem;
  }

  .docs-frame > .site-aside {
    position: sticky;
    top: var(--pmx-viewport-inset-block-start);
    margin: 0 0 1rem;
    padding: 0;
    border: 0;
  }

  .docs-sidebar {
    display: none;
  }
}