Hairline stat strip

Fig. 15 — Two forms of one strip. The 1px of container showing through each gap is the hairline.

<p class="hss-cap">Reporting only — the figures are the whole job.</p>
<div class="hss-strip four" role="list">
  <div class="hss-tile" role="listitem"><span class="l">Documents</span><span class="f">1,482</span><span class="s">this period</span></div>
  <div class="hss-tile" role="listitem"><span class="l">Median time</span><span class="f">3.2s</span><span class="s">last 24h</span></div>
  <div class="hss-tile" role="listitem"><span class="l">Clean runs</span><span class="f">98.4%</span><span class="s">no retries</span></div>
  <div class="hss-tile" role="listitem"><span class="l">Quality score</span><span class="f none" aria-label="No value">—</span><span class="s">not rated yet</span></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-strip five">
  <button class="hss-tile" type="button" data-state="All" aria-pressed="false"><span class="l">All</span><span class="f">6</span><span class="s">downloads</span></button>
  <button class="hss-tile" type="button" data-state="Queued" aria-pressed="false"><span class="l">Queued</span><span class="f">2</span><span class="s">downloads</span></button>
  <button class="hss-tile" type="button" data-state="Downloading" aria-pressed="false"><span class="l">Downloading</span><span class="f">1</span><span class="s">downloads</span></button>
  <button class="hss-tile" type="button" data-state="Done" aria-pressed="false"><span class="l">Done</span><span class="f">2</span><span class="s">downloads</span></button>
  <button class="hss-tile" type="button" data-state="Failed" aria-pressed="false"><span class="l">Failed</span><span class="f">1</span><span class="s">downloads</span></button>
</div>
<ul class="hss-list">
    <li data-state="Done"><span>Bicycle drivetrain teardown</span><span class="hss-st" data-s="Done">Done</span></li>
    <li data-state="Downloading"><span>Kiln firing, part three</span><span class="hss-st" data-s="Downloading">Downloading</span></li>
    <li data-state="Queued"><span>Field recording — marsh at dawn</span><span class="hss-st" data-s="Queued">Queued</span></li>
    <li data-state="Done"><span>Lathe restoration, episode 12</span><span class="hss-st" data-s="Done">Done</span></li>
    <li data-state="Failed"><span>Sourdough hydration tests</span><span class="hss-st" data-s="Failed">Failed</span></li>
    <li data-state="Queued"><span>Bookbinding: the long stitch</span><span class="hss-st" data-s="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;
  background: var(--border);
  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.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .hss-strip.five { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 64rem) { .hss-strip.five { grid-template-columns: repeat(5, minmax(0, 1fr)); } }

.hss-tile { background: var(--surface); padding: .9rem 1rem; min-width: 0; text-align: left; border: 0; }
.hss-tile .l { display: block; font-family: ui-monospace, monospace; text-transform: uppercase;
  letter-spacing: .06em; font-size: .8125rem; color: var(--dim); overflow-wrap: anywhere; }
.hss-tile .f { display: block; font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-tile .f.none { color: var(--dim); font-weight: 400; }
.hss-tile .s { display: block; color: var(--dim); overflow-wrap: anywhere; }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

const tiles = [...document.querySelectorAll('.hss-strip.five button')];
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 state = wasOn || tile.dataset.state === 'All' ? 'All' : tile.dataset.state;
  tiles.forEach((other) => other.setAttribute('aria-pressed', String(state !== 'All' && other === tile)));
  // counts on the tiles come from the unfiltered set, so they never change here
  let shown = 0;
  rows.forEach((row) => {
    row.hidden = !(state === 'All' || row.dataset.state === state);
    if (!row.hidden) shown += 1;
  });
  status.textContent = state === 'All'
    ? 'Showing all 6 downloads.'
    : `Filtered to ${state}: ${shown} of 6. Press the lit tile again to clear.`;
}));