Hairline stat strip

<p class="hss-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" aria-label="No value">—</span><span class="hss-sub">not rated yet</span></div>
</div>
<p class="hss-cap" style="margin-top:1.75rem">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">download</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">download</span></button>
</div>
<ul class="hss-list" data-hss-list>
  <li data-status="done">Bicycle drivetrain teardown <span>Done</span></li>
  <li data-status="downloading">Kiln firing, part three <span>Downloading</span></li>
  <li data-status="queued">Field recording — marsh at dawn <span>Queued</span></li>
  <li data-status="done">Lathe restoration, episode 12 <span>Done</span></li>
  <li data-status="failed">Sourdough hydration tests <span>Failed</span></li>
  <li data-status="queued">Bookbinding: the long stitch <span>Queued</span></li>
</ul>
<p class="hss-status" data-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 */
  background: var(--border);      /* container paints the line */
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: 1fr;
}
.hss-wrap { container-type: inline-size; }
@container (min-width: 21rem) { .hss-strip { grid-template-columns: repeat(2, 1fr); } }
@container (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, 1fr); } }

.hss-tile {
  background: var(--surface);     /* tiles paint the surface */
  padding: 1rem 1.1rem;
  display: flex; flex-direction: column; gap: .15rem;
  min-width: 0;                   /* labels wrap instead of overflowing */
}
.hss-label { font: 500 .8125rem/1.3 ui-monospace, monospace; text-transform: uppercase; letter-spacing: .1em; color: var(--dim); }
.hss-fig { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--ink); }
.hss-fig.none { color: var(--dim); font-weight: 400; }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

:root {
  --ground: #eef0f3; --surface: #ffffff; --surface-2: #f5f7f9;
  --border: #d2d8e0; --ink: #161b22; --dim: #56606e;
  --accent: #364f6a; --radius: 10px;
}

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

strip.addEventListener('click', (event) => {
  const tile = event.target.closest('button.hss-tile');
  if (!tile) return;
  const value = tile.dataset.status;
  current = current === value || value === 'all' ? 'all' : value;

  strip.querySelectorAll('button.hss-tile').forEach((button) => {
    button.setAttribute('aria-pressed', String(button.dataset.status === current));
  });

  let shown = 0;
  rows.forEach((row) => {
    const match = current === 'all' || row.dataset.status === current;
    row.hidden = !match;
    if (match) shown += 1;
  });

  status.textContent = current === 'all'
    ? `Showing all ${rows.length} downloads.`
    : `Filtered to ${tile.querySelector('.hss-label').textContent}: ${shown} of ${rows.length}. Press the lit tile again to clear.`;
});