Hairline stat strip

<p class="cap">Reporting only — the figures are the whole job.</p>
<div class="hss-strip four">
<div class="hss-tile">
<span class="hss-label">Documents</span>
<span class="hss-fig">1,482</span>
<span class="hss-sub">this period</span>
</div>
<div class="hss-tile">
<span class="hss-label">Median time</span>
<span class="hss-fig">3.2s</span>
<span class="hss-sub">last 24h</span>
</div>
<div class="hss-tile">
<span class="hss-label">Clean runs</span>
<span class="hss-fig">98.4%</span>
<span class="hss-sub">no retries</span>
</div>
<div class="hss-tile">
<span class="hss-label">Quality score</span>
<span class="hss-fig none">—</span>
<span class="hss-sub">not rated yet</span>
</div>
</div>
<p class="cap">Same strip, working as the filter. Press a tile to narrow the list; press it again to clear.</p>
<div class="hss-strip five" data-hss-filter role="group" aria-label="Filter downloads by status">
<button class="hss-tile" type="button" data-status="All" aria-pressed="true">
<span class="hss-label">All</span>
<span class="hss-fig">6</span>
<span class="hss-sub">downloads</span>
</button>
<button class="hss-tile" type="button" data-status="Queued" aria-pressed="false">
<span class="hss-label">Queued</span>
<span class="hss-fig">2</span>
<span class="hss-sub">downloads</span>
</button>
<button class="hss-tile" type="button" data-status="Downloading" aria-pressed="false">
<span class="hss-label">Downloading</span>
<span class="hss-fig">1</span>
<span class="hss-sub">downloads</span>
</button>
<button class="hss-tile" type="button" data-status="Done" aria-pressed="false">
<span class="hss-label">Done</span>
<span class="hss-fig">2</span>
<span class="hss-sub">downloads</span>
</button>
<button class="hss-tile" type="button" data-status="Failed" aria-pressed="false">
<span class="hss-label">Failed</span>
<span class="hss-fig">1</span>
<span class="hss-sub">downloads</span>
</button>
</div>
<ul class="hss-list">
<li data-status="Done">
<span>Bicycle drivetrain teardown</span>
<span class="hss-st Done">Done</span>
</li>
<li data-status="Downloading">
<span>Kiln firing, part three</span>
<span class="hss-st Downloading">Downloading</span>
</li>
<li data-status="Queued">
<span>Field recording — marsh at dawn</span>
<span class="hss-st Queued">Queued</span>
</li>
<li data-status="Done">
<span>Lathe restoration, episode 12</span>
<span class="hss-st Done">Done</span>
</li>
<li data-status="Failed">
<span>Sourdough hydration tests</span>
<span class="hss-st Failed">Failed</span>
</li>
<li data-status="Queued">
<span>Bookbinding: the long stitch</span>
<span class="hss-st Queued">Queued</span>
</li>
</ul>
<p class="hss-status" aria-live="polite">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-strip {
  display: grid;
  gap: 1px;                       /* the hairline IS the gap */
  background: var(--border);      /* container paints the line colour */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: 1fr;
}
@media (min-width: 21rem) { .hss-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.hss-tile { background: var(--surface); padding: 14px 16px; display: grid; gap: 2px; min-width: 0; }
.hss-label { font-family: ui-monospace, monospace; text-transform: uppercase; font-size: .8125rem; color: var(--dim); overflow-wrap: anywhere; }
.hss-fig { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-fig.none { color: var(--dim); font-weight: 400; }  /* missing value: dimmed em dash */
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

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

tiles.forEach((tile) => {
  tile.addEventListener('click', () => {
    const wasOn = tile.getAttribute('aria-pressed') === 'true';
    const value = tile.dataset.status;
    const filter = wasOn || value === 'All' ? null : value;
    tiles.forEach((other) => other.setAttribute('aria-pressed', 'false'));
    (filter ? tile : strip.querySelector('[data-status=All]')).setAttribute('aria-pressed', 'true');
    let shown = 0;
    rows.forEach((row) => {
      row.hidden = filter && row.dataset.status !== filter;
      if (!row.hidden) shown += 1;
    });
    status.textContent = filter
      ? `Filtered to ${filter}: ${shown} of ${rows.length}. Press the lit tile again to clear.`
      : `Showing all ${rows.length} downloads.`;
  });
});