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
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 teardown Done
- Kiln firing, part three Downloading
- Field recording — marsh at dawn Queued
- Lathe restoration, episode 12 Done
- Sourdough hydration tests Failed
- Bookbinding: the long stitch Queued
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-sub">this period</span></div>
<div class="hss-tile"><span class="hss-label">Median time</span><span class="hss-fig">3.2s</span><span class="hss-sub">last 24h</span></div>
<div class="hss-tile"><span class="hss-label">Clean runs</span><span class="hss-fig">98.4%</span><span class="hss-sub">no retries</span></div>
<div class="hss-tile"><span class="hss-label">Quality score</span><span class="hss-fig none" aria-label="No value">—</span><span class="hss-sub">not rated yet</span></div>
</div>
<p class="hss-caption">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" aria-pressed="false" data-filter="All"><span class="hss-label">All</span><span class="hss-fig">6</span><span class="hss-sub">downloads</span></button>
<button class="hss-tile" type="button" aria-pressed="false" data-filter="Queued"><span class="hss-label">Queued</span><span class="hss-fig">2</span><span class="hss-sub">downloads</span></button>
<button class="hss-tile" type="button" aria-pressed="false" data-filter="Downloading"><span class="hss-label">Downloading</span><span class="hss-fig">1</span><span class="hss-sub">downloads</span></button>
<button class="hss-tile" type="button" aria-pressed="false" data-filter="Done"><span class="hss-label">Done</span><span class="hss-fig">2</span><span class="hss-sub">downloads</span></button>
<button class="hss-tile" type="button" aria-pressed="false" data-filter="Failed"><span class="hss-label">Failed</span><span class="hss-fig">1</span><span class="hss-sub">downloads</span></button>
</div>
<ul class="hss-list">
<li data-status="Done">Bicycle drivetrain teardown <span class="st">Done</span></li>
<li data-status="Downloading">Kiln firing, part three <span class="st">Downloading</span></li>
<li data-status="Queued">Field recording — marsh at dawn <span class="st">Queued</span></li>
<li data-status="Done">Lathe restoration, episode 12 <span class="st">Done</span></li>
<li data-status="Failed">Sourdough hydration tests <span class="st">Failed</span></li>
<li data-status="Queued">Bookbinding: the long stitch <span class="st">Queued</span></li>
</ul>
<p class="hss-status" role="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 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.hss-strip.five { grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr)); }
}
.hss-tile { background: var(--surface); padding: .9rem 1rem; display: flex; flex-direction: column; min-width: 0; }
.hss-label { font: 500 .8125rem ui-monospace, monospace; text-transform: uppercase; letter-spacing: .06em; color: var(--dim); overflow-wrap: anywhere; }
.hss-fig { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--ink); }
.hss-fig.none { color: var(--dim); opacity: .7; }
button.hss-tile[aria-pressed="true"] {
background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}const tiles = [...document.querySelectorAll("button.hss-tile")];
const rows = [...document.querySelectorAll(".hss-list li")];
const status = document.querySelector(".hss-status");
tiles.forEach((tile) => {
tile.addEventListener("click", () => {
const wasPressed = tile.getAttribute("aria-pressed") === "true";
tiles.forEach((other) => other.setAttribute("aria-pressed", "false"));
const filter = wasPressed || tile.dataset.filter === "All" ? null : tile.dataset.filter;
if (filter) tile.setAttribute("aria-pressed", "true");
let shown = 0;
rows.forEach((row) => {
row.hidden = Boolean(filter) && row.dataset.status !== filter;
if (!row.hidden) shown += 1;
});
status.textContent = filter
? `Filtered to ${filter}: ${shown} of ${rows.length}. Press the lit tile again to clear.`
: `Showing all ${rows.length} downloads.`;
});
});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.
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