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.

Reach for it when buildingHab.

summary strip at the top of a detail page
dashboard KPI row
account usage overview
report header figures
profile stats band

Tags

stats
css-grid
css-only
hairline
no-assets

The five-tile filter row wraps with auto-fit here, so "Downloading" never overflows its tile.

Reporting only — the figures are the whole job.

Documents1,482this period

Median time3.2slast 24h

Clean runs98.4%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.

<p class="cap">Reporting only — the figures are the whole job.</p>
<div class="hss-strip">
  <div class="hss-tile"><span class="k">Documents</span><span class="v">1,482</span><span class="u">this period</span></div>
  <div class="hss-tile"><span class="k">Median time</span><span class="v">3.2s</span><span class="u">last 24h</span></div>
  <div class="hss-tile"><span class="k">Clean runs</span><span class="v">98.4%</span><span class="u">no retries</span></div>
  <div class="hss-tile"><span class="k">Quality score</span><span class="v none" aria-label="No value">—</span><span class="u">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" data-hss-filter>
  <button class="hss-tile" type="button" data-status="All" aria-pressed="true"><span class="k">All</span><span class="v">6</span><span class="u">downloads</span></button>
  <button class="hss-tile" type="button" data-status="Queued" aria-pressed="false"><span class="k">Queued</span><span class="v">2</span><span class="u">downloads</span></button>
  <button class="hss-tile" type="button" data-status="Downloading" aria-pressed="false"><span class="k">Downloading</span><span class="v">1</span><span class="u">downloads</span></button>
  <button class="hss-tile" type="button" data-status="Done" aria-pressed="false"><span class="k">Done</span><span class="v">2</span><span class="u">downloads</span></button>
  <button class="hss-tile" type="button" data-status="Failed" aria-pressed="false"><span class="k">Failed</span><span class="v">1</span><span class="u">downloads</span></button>
</div>
<ul class="dl-list" data-dl>
  <li data-status="Done"><span>Bicycle drivetrain teardown</span><span class="st">Done</span></li>
  <li data-status="Downloading"><span>Kiln firing, part three</span><span class="st">Downloading</span></li>
  <li data-status="Queued"><span>Field recording — marsh at dawn</span><span class="st">Queued</span></li>
  <li data-status="Done"><span>Lathe restoration, episode 12</span><span class="st">Done</span></li>
  <li data-status="Failed"><span>Sourdough hydration tests</span><span class="st">Failed</span></li>
  <li data-status="Queued"><span>Bookbinding: the long stitch</span><span class="st">Queued</span></li>
</ul>
<p class="status-line" role="status" data-hss-status>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, 1fr); } }
@media (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, 1fr); } }

/* the filter row has five tiles: let it wrap rather than overflow */
.hss-strip.five { grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr)); }

.hss-tile { background: var(--surface); padding: 0.9rem 1rem; min-width: 0; }
.hss-tile .k { font: 0.8125rem/1.3 ui-monospace, monospace; text-transform: uppercase; color: var(--dim); }
.hss-tile .v { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-tile .v.none { color: var(--dim); font-weight: 400; }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

const tiles = [...document.querySelectorAll('[data-hss-filter] button')];
const items = [...document.querySelectorAll('[data-dl] li')];
const status = document.querySelector('[data-hss-status]');

tiles.forEach((tile) => tile.addEventListener('click', () => {
  const wasOn = tile.getAttribute('aria-pressed') === 'true';
  const pick = wasOn || tile.dataset.status === 'All' ? 'All' : tile.dataset.status;
  tiles.forEach((other) => other.setAttribute('aria-pressed', String(other.dataset.status === pick)));
  // counts come from the unfiltered set, so tiles never change their figures
  const shown = items.filter((item) => {
    item.hidden = pick !== 'All' && item.dataset.status !== pick;
    return !item.hidden;
  }).length;
  status.textContent = pick === 'All'
    ? 'Showing all 6 downloads.'
    : `Filtered to ${pick}: ${shown} of 6. Press the lit tile again to clear.`;
}));

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 (render a missing value as a dimmed em dash; keep units with the number), the filter form, computing counts from the unfiltered set, and using aria-pressed rather than tab roles.

Species affines

Neighbouring plates

Adaptive tile mosaic

A container with no artwork draws one from up to four member tiles, grid tracks following tile count.

LayoutTab. 13 Benchmark progress bar

Places a raw figure on a scale of external benchmarks instead of printing it plain.

Data displayTab. 02 Filtered to zero

The three empty states a list actually has, written as three different screens.

FormsTab. 35