Hairline stat strip

<p class="hss-cap">Reporting only — the figures are the whole job.</p>
<div class="hss-host">
  <div class="hss-strip">
    <div class="hss-tile"><span class="l">Documents</span><span class="f">1,482</span><span class="u">this period</span></div>
    <div class="hss-tile"><span class="l">Median time</span><span class="f">3.2s</span><span class="u">last 24h</span></div>
    <div class="hss-tile"><span class="l">Clean runs</span><span class="f">98.4%</span><span class="u">no retries</span></div>
    <div class="hss-tile"><span class="l">Quality score</span><span class="f none" aria-label="No value">—</span><span class="u">not rated yet</span></div>
  </div>
</div>
<p class="hss-cap">Same strip, working as the filter. Press a tile to narrow the list; press it again to clear.</p>
<div class="hss-host">
  <div class="hss-strip hss-strip--5" role="group" aria-label="Filter downloads by status">
    <button class="hss-tile" type="button" data-status="all" aria-pressed="true"><span class="l">All</span><span class="f">6</span><span class="u">downloads</span></button>
    <button class="hss-tile" type="button" data-status="Queued" aria-pressed="false"><span class="l">Queued</span><span class="f">2</span><span class="u">downloads</span></button>
    <button class="hss-tile" type="button" data-status="Downloading" aria-pressed="false"><span class="l">Downloading</span><span class="f">1</span><span class="u">downloads</span></button>
    <button class="hss-tile" type="button" data-status="Done" aria-pressed="false"><span class="l">Done</span><span class="f">2</span><span class="u">downloads</span></button>
    <button class="hss-tile" type="button" data-status="Failed" aria-pressed="false"><span class="l">Failed</span><span class="f">1</span><span class="u">downloads</span></button>
  </div>
</div>
<ul class="hss-list">
  <li data-status="Done"><span>Bicycle drivetrain teardown</span><span class="s">Done</span></li>
  <li data-status="Downloading"><span>Kiln firing, part three</span><span class="s">Downloading</span></li>
  <li data-status="Queued"><span>Field recording — marsh at dawn</span><span class="s">Queued</span></li>
  <li data-status="Done"><span>Lathe restoration, episode 12</span><span class="s">Done</span></li>
  <li data-status="Failed"><span>Sourdough hydration tests</span><span class="s">Failed</span></li>
  <li data-status="Queued"><span>Bookbinding: the long stitch</span><span class="s">Queued</span></li>
</ul>
<p class="hss-status" role="status">Showing all 6 downloads.</p>

Colors come from shared theme tokens — --surface, --ink, --border, --accent and friends — so this CSS carries no palette of its own. Use Runnable file to copy the tokens along with it.

.hss-host { container: hss / inline-size; }
.hss-strip {
  display: grid;
  gap: 1px;                      /* the hairline */
  background: var(--border);     /* shows through the gap */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: 1fr;
}
@container hss (min-width: 21rem) { .hss-strip { grid-template-columns: repeat(2, 1fr); } }
@container hss (min-width: 42rem) {
  .hss-strip { grid-template-columns: repeat(4, 1fr); }
  .hss-strip--5 { grid-template-columns: repeat(5, 1fr); }
}
.hss-tile { background: var(--surface); padding: 1rem 1.1rem; min-width: 0; text-align: left; }
.hss-tile .l {
  font: 500 0.8125rem/1.3 ui-monospace, monospace;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--dim); overflow-wrap: anywhere;   /* long labels wrap instead of clipping */
}
.hss-tile .f { display: block; font: 700 1.6rem/1.2 system-ui; font-variant-numeric: tabular-nums; }
.hss-tile .f.none { color: var(--dim); font-weight: 400; }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
  box-shadow: inset 0 -3px 0 var(--accent);
}

const tiles = document.querySelectorAll('.hss-strip [data-status]');
const rows = document.querySelectorAll('.hss-list [data-status]');
const status = document.querySelector('.hss-status');

tiles.forEach((tile) => {
  tile.addEventListener('click', () => {
    const pressedAgain = tile.getAttribute('aria-pressed') === 'true' && tile.dataset.status !== 'all';
    const chosen = pressedAgain ? 'all' : tile.dataset.status;
    tiles.forEach((other) => other.setAttribute('aria-pressed', String(other.dataset.status === chosen)));
    let shown = 0;
    rows.forEach((row) => {
      row.hidden = chosen !== 'all' && row.dataset.status !== chosen;
      if (!row.hidden) shown += 1;
    });
    status.textContent = chosen === 'all'
      ? `Showing all ${rows.length} downloads.`
      : `Filtered to ${chosen}: ${shown} of ${rows.length}. Press the lit tile again to clear.`;
  });
});