Hairline stat strip

<p class="hss-caption">Reporting only — the figures are the whole job.</p>
<div class="hss-strip">
  <div class="hss-tile">
    <span class="l">Documents</span>
    <span class="v">1,482</span>
    <span class="u">this period</span>
  </div>
  <!-- Median time, Clean runs … -->
  <div class="hss-tile">
    <span class="l">Quality score</span>
    <span class="v missing" aria-label="No value">—</span>
    <span class="u">not rated yet</span>
  </div>
</div>

<p class="hss-caption">Same strip, working as the filter.</p>
<div class="hss-strip five" data-hss-filter>
  <button type="button" class="hss-tile" data-status="All" aria-pressed="true">
    <span class="l">All</span><span class="v">6</span><span class="u">downloads</span>
  </button>
  <!-- Queued, Downloading, Done, Failed … -->
</div>
<ul class="hss-list" data-hss-list>…</ul>
<p class="hss-status" role="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 */
  background: var(--border);      /* shows through the gap */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: 1fr;
}
@container (min-width: 21rem) {
  .hss-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@container (min-width: 42rem) {
  .hss-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.hss-tile { background: var(--surface); padding: .9rem 1rem; min-width: 0; }
.hss-tile .l {
  font: .8125rem/1.3 ui-monospace, monospace;
  text-transform: uppercase; letter-spacing: .06em; color: var(--dim);
}
.hss-tile .v { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-tile .v.missing { color: var(--dim); }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

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

strip.addEventListener('click', (event) => {
  const tile = event.target.closest('button');
  if (!tile) return;
  const wasPressed = tile.getAttribute('aria-pressed') === 'true';
  const filter = wasPressed ? 'All' : tile.dataset.status;
  for (const other of strip.querySelectorAll('button')) {
    other.setAttribute('aria-pressed', String(other.dataset.status === filter));
  }
  let shown = 0;
  for (const row of rows) {
    row.hidden = filter !== 'All' && row.dataset.status !== filter;
    if (!row.hidden) shown += 1;
  }
  status.textContent = filter === 'All'
    ? 'Showing all 6 downloads.'
    : `Filtered to ${filter}: ${shown} of 6. Press the lit tile again to clear.`;
});