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 building
- summary strip at the top of a detail page
- dashboard KPI row
- account usage overview
- report header figures
- profile stats band
Tags
Reporting only — the figures are the whole job.
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="hss-caption">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-note">this period</span>
</div>
<!-- … three more tiles … -->
<div class="hss-tile">
<span class="hss-label">Quality score</span>
<span class="hss-fig hss-none" aria-label="No value">—</span>
<span class="hss-note">not rated yet</span>
</div>
</div>
<div class="hss-strip hss-strip--filter" role="group" aria-label="Filter downloads">
<button class="hss-tile" type="button" aria-pressed="true" data-state="All">
<span class="hss-label">All</span><span class="hss-fig">6</span><span class="hss-note">downloads</span>
</button>
<!-- Queued · Downloading · Done · Failed -->
</div>
<ul class="hss-list"><!-- rows carry data-state --></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; /* the hairline */
background: var(--border); /* shows through the gap */
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: 14px 16px; min-width: 0; }
.hss-label { font: 600 0.8125rem var(--mono); text-transform: uppercase; color: var(--dim); }
.hss-fig { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.hss-none { color: var(--dim); }
.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 wasOn = tile.getAttribute("aria-pressed") === "true";
const state = wasOn ? "All" : tile.dataset.state;
tiles.forEach((other) =>
other.setAttribute("aria-pressed", String(other.dataset.state === state)));
rows.forEach((row) => { row.hidden = state !== "All" && row.dataset.state !== state; });
status.textContent = state === "All"
? "Showing all 6 downloads."
: `Filtered to ${state}: ${visibleCount} 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.
In this redesign the five-tile filter row drops to two columns below 52rem instead of squeezing five, so labels like “Downloading” never clip.