LayoutUpdated

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.

Added Aug 21, 2026 · Updated Sep 28, 2026

Reach for it when building

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

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.

<div class="hss-strip four">
  <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="Not rated">—</span><span class="u">not rated yet</span></div>
</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;
}
@container (min-width: 21rem) { .hss-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@container (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.hss-tile { background: var(--surface); padding: 1rem; min-width: 0; }
.hss-tile .k { font: 600 0.8125rem/1.2 ui-monospace, monospace; text-transform: uppercase; overflow-wrap: anywhere; }
.hss-tile .v { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-tile .v.none { color: var(--dim); }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

const tiles = strip.querySelectorAll('button');
tiles.forEach((tile) => {
  tile.addEventListener('click', () => {
    const wasPressed = tile.getAttribute('aria-pressed') === 'true';
    const state = wasPressed ? 'All' : tile.dataset.state;
    tiles.forEach((other) =>
      other.setAttribute('aria-pressed', String(other.dataset.state === state && state !== 'All')));
    rows.forEach((row) => { row.hidden = state !== 'All' && row.dataset.state !== state; });
    announce(state);
  });
});

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.

Pin the column counts rather than letting auto-fit choose: one column, two from 21rem, four from 42rem. Each tile carries a mono uppercase label, a bold tabular-nums figure, and a unit line.

Two rules of honesty: render a missing value as a dimmed em dash, never as zero; keep units with the number.

In the filter form, each tile is a button with aria-pressed, not a tab. Compute every count from the unfiltered set so the numbers never change under the reader's finger. Pressing the lit tile again clears the filter.

:root{--border:#d2d8e0;--surface:#fff;--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: 1fr;
}
@container (min-width: 21rem) { .hss-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@container (min-width: 42rem) { .hss-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.hss-tile { background: var(--surface); padding: 1rem; min-width: 0; }
.hss-tile .k { font: 600 0.8125rem/1.2 ui-monospace, monospace; text-transform: uppercase; overflow-wrap: anywhere; }
.hss-tile .v { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-tile .v.none { color: var(--dim); }
button.hss-tile[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}
<div class="hss-strip four">
  <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="Not rated">—</span><span class="u">not rated yet</span></div>
</div>