Article NavigationBLK

/* -- Article Navigation (website) -----------------------------------

   Links to the previous and next article (rel="prev" / rel="next"): a

   direction label and the title, the next link aligned to the end. A lone

   next link keeps its side. Default: two cards; minimal: text between rules. */

@layer components {

  .mk-article-nav {

    container: mk-article-nav / inline-size;

    display: grid;

    grid-template-columns: repeat(2, minmax(0, 1fr));

    gap: 1rem;

    box-sizing: border-box;

    width: 100%;

  }

  .mk-article-nav-link {

    display: flex;

    flex-direction: column;

    gap: 0.375rem;

    min-width: 0;

    padding: 1rem 1.25rem;

    border: 1px solid var(--border);

    border-radius: var(--radius-lg);

    color: var(--foreground);

    text-decoration: none;

    transition: border-color 120ms, background-color 120ms;

    &:hover { border-color: color-mix(in oklch, var(--foreground) 35%, var(--border)); background: var(--accent); }

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

    &[rel~="next"] { align-items: flex-end; text-align: end; }

    /* only a next link: it stays on the end side */

    &[rel~="next"]:only-child { grid-column: 2; }

  }

  .mk-article-nav-dir {

    display: inline-flex;

    align-items: center;

    gap: 0.375rem;

    color: var(--muted-foreground);

    font-size: 0.8125rem;

    font-weight: 500;

    & svg { width: 1rem; height: 1rem; transition: translate 150ms ease; }

  }

  .mk-article-nav-link[rel~="prev"]:hover .mk-article-nav-dir svg { translate: -0.2rem 0; }

  .mk-article-nav-link[rel~="next"]:hover .mk-article-nav-dir svg { translate: 0.2rem 0; }

  .mk-article-nav-title {

    font-size: 1rem;

    font-weight: 600;

    line-height: 1.35;

    text-wrap: balance;

  }

  /* narrow: the links stack */

  @container mk-article-nav (max-width: 32rem) {

    .mk-article-nav > .mk-article-nav-link[rel] { grid-column: 1 / -1; }

  }

  /* media: a thumbnail on each card (start for prev, end for next) */

  .mk-article-nav[data-variant="media"] .mk-article-nav-link {

    display: grid;

    grid-template-columns: 4.5rem minmax(0, 1fr);

    grid-template-rows: auto 1fr;

    align-items: start;

    gap: 0.25rem 1rem;

    padding: 0.75rem;

    & img { grid-row: 1 / span 2; width: 4.5rem; aspect-ratio: 1; border-radius: var(--radius-md); object-fit: cover; background: var(--muted); }

    &[rel~="next"] { grid-template-columns: minmax(0, 1fr) 4.5rem; justify-items: end; }

    &[rel~="next"] img { grid-column: 2; grid-row: 1 / span 2; }

    &[rel~="next"] :is(.mk-article-nav-dir, .mk-article-nav-title) { grid-column: 1; }

  }

  /* compact: two small pill links with the titles truncated */

  .mk-article-nav[data-variant="compact"] {

    display: flex;

    justify-content: space-between;

    gap: 0.75rem;

    & .mk-article-nav-link {

      flex-direction: row;

      align-items: center;

      gap: 0.5rem;

      max-width: 48%;

      padding: 0.375rem 0.875rem;

      border-radius: 999px;

    }

    & .mk-article-nav-link[rel~="next"]:only-child { margin-inline-start: auto; }

    & .mk-article-nav-title { overflow: hidden; font-size: 0.875rem; white-space: nowrap; text-overflow: ellipsis; }

    & .mk-article-nav-dir { flex: none; }

    & .mk-article-nav-dir span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

  }

  /* minimal: no cards, a rule above */

  .mk-article-nav[data-variant="minimal"] {

    padding-block-start: 1.25rem;

    border-block-start: 1px solid var(--border);

    & .mk-article-nav-link {

      padding: 0;

      border: 0;

      border-radius: var(--radius-sm);

      &:hover { background: transparent; }

      &:hover .mk-article-nav-title { text-decoration: underline; text-underline-offset: 0.2em; }

    }

  }

  /* -- Accessibility ------------------------------------------- */

  @media (prefers-reduced-motion: reduce) {

    .mk-article-nav-link,

    .mk-article-nav-dir svg { transition: none; }

    .mk-article-nav-link:hover .mk-article-nav-dir svg { translate: none; }

  }

  @media (prefers-contrast: more) {

    .mk-article-nav-link { border-color: var(--foreground); }

    .mk-article-nav-dir { color: var(--foreground); }

  }

  @media (forced-colors: active) {

    .mk-article-nav-link { color: LinkText; border-color: LinkText; }

  }

}