Hairline stat strip

<p class="cap">Reporting only — the figures are the whole job.</p>
<div class="hss-strip">
  <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" id="hss-filter">
  <button class="hss-tile" data-status="all" aria-pressed="false">…</button>
  <!-- Queued · Downloading · Done · Failed -->
</div>
<ul class="dl-list" id="hss-list">…</ul>
<p class="status" id="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 color */
  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, 1fr); } }
@media (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, 1fr); } }

.hss-tile { background: var(--surface); padding: .85rem 1rem; min-width: 0; }
.hss-label {
  font-family: ui-monospace, monospace; font-size: .8125rem;
  text-transform: uppercase; letter-spacing: .05em; color: var(--dim);
}
.hss-fig { font-size: 1.6rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.hss-fig.none { color: var(--dim); }

button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

:root {
  --ground: #eef0f3; --surface: #ffffff; --border: #d2d8e0;
  --ink: #161b22; --dim: #56606e; --accent: #364f6a; --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root { --ground: #10141a; --surface: #191f27; --border: #2c3743;
          --ink: #e6ecf3; --dim: #97a4b4; --accent: #6f92bd; }
}

const strip = document.getElementById('hss-filter');
const items = document.querySelectorAll('#hss-list li');
const status = document.getElementById('hss-status');

strip.querySelectorAll('button').forEach((tile) => {
  tile.addEventListener('click', () => {
    const wasOn = tile.getAttribute('aria-pressed') === 'true';
    const key = wasOn ? 'all' : tile.dataset.status;
    strip.querySelectorAll('button').forEach((other) => {
      other.setAttribute('aria-pressed', String(!wasOn && other === tile && key !== 'all'));
    });
    let shown = 0;
    items.forEach((item) => {
      const match = key === 'all' || item.dataset.status === key;
      item.hidden = !match;
      if (match) shown += 1;
    });
    status.textContent = key === 'all'
      ? 'Showing all 6 downloads.'
      : `Filtered to ${tile.dataset.name}: ${shown} of 6. Press the lit tile again to clear.`;
  });
});