Hairline stat strip

A row of stat tiles joined by hairlines that are grid gap, not borders — the container paints the border color and the tiles paint the surface, so separators never double up or break when the row wraps — in a reporting form and in a second form where each tile is the filter for the list beneath it.

Panes

Reporting only — the figures are the whole job.

Documents: 1,482; this period
Median time: 3.2s; last 24h
Clean runs: 98.4%; no retries
Quality score: —; not rated yet

Same strip, working as the filter. Press a tile to narrow the list; press it again to clear.

Bicycle drivetrain teardownDone
Kiln firing, part threeDownloading
Field recording — marsh at dawnQueued
Lathe restoration, episode 12Done
Sourdough hydration testsFailed
Bookbinding: the long stitchQueued

Showing all 6 downloads.

<dl class="hss-strip">
  <div class="hss-tile">
    <dt class="hss-label">Documents</dt>
    <dd class="hss-fig">1,482</dd>
    <dd class="hss-sub">this period</dd>
  </div>
  <div class="hss-tile">
    <dt class="hss-label">Quality score</dt>
    <dd class="hss-fig is-missing" aria-label="No value">&mdash;</dd>
    <dd class="hss-sub">not rated yet</dd>
  </div>
</dl>

<div class="hss-strip" role="group" aria-label="Filter downloads by status">
  <button class="hss-tile" type="button" aria-pressed="false" data-status="queued">
    <span class="hss-label">Queued</span>
    <span class="hss-fig">2</span>
    <span class="hss-sub">downloads</span>
  </button>
</div>

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, 1fr); } }
@media (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, 1fr); } }

.hss-tile { background: var(--surface); padding: .9rem 1rem; }
.hss-label {
  font: 500 0.8125rem/1.3 ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--dim);
}
.hss-fig { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--ink); }
.hss-fig.is-missing { color: var(--dim); }
.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

const tiles = strip.querySelectorAll('.hss-tile');
tiles.forEach((tile) => {
  tile.addEventListener('click', () => {
    const wasPressed = tile.getAttribute('aria-pressed') === 'true';
    tiles.forEach((other) => other.setAttribute('aria-pressed', 'false'));
    tile.setAttribute('aria-pressed', String(!wasPressed));
    // Counts stay computed from the unfiltered set, so a tile never reads 0 because of itself.
    applyFilter(wasPressed ? 'all' : tile.dataset.status);
  });
});

Build a strip of statistic tiles that reads as one joined instrument panel rather than a row of floating cards.

The separators between tiles must not be borders. Make the container a CSS grid with gap: 1px and give the container itself the border color as its background; each tile then paints the surface color on top. The 1px of container showing through the gap is the hairline. This is the entire pattern: real borders double where two tiles meet and leave a stray edge when auto-fit wraps the row, and a gap physically cannot do either.

The full prompt continues with sections on pinning column counts, tile anatomy, two rules of honesty (a missing value renders as a dimmed em dash; units stay with the number), the filter form, computing counts from the unfiltered set, and using aria-pressed rather than tab roles.

<!-- Hairline stat strip: tokens + CSS + HTML in one file -->
<style>
:root { --ground:#eef0f3; --surface:#ffffff; --border:#d2d8e0; --ink:#161b22; --dim:#56606e; --accent:#364f6a; --radius:10px; }
.hss-strip { display:grid; gap:1px; background:var(--border); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; grid-template-columns:repeat(auto-fit, minmax(8.5rem, 1fr)); }
.hss-tile { background:var(--surface); padding:.9rem 1rem; }
</style>