No.85 · Cards
Feature Trio
Three cards that explain a product by doing it: each card holds a tiny working piece of the UI — a build log, a live latency line, a firewall counter — that wakes up when you point at it.
The prompt
Written for the variant you picked above: Frost
Build a three-card feature section for a developer platform where each card demonstrates its feature with a miniature piece of working UI instead of an icon. The cards share one rounded container and are separated by 1px gaps over a hairline background (the gaps are the dividers). Each card: a 152px dark 'screen' at the top, then a mono index, an Instrument Serif title and a short muted paragraph. - Ship from a push: a build log whose lines complete in sequence — waiting lines faint, the running line bright with a blinking accent dot, finished lines with green dots, ending on 'Ready · 41s'. - See it as it runs: a live latency sparkline (40 points, random walk with occasional spikes) with its area tint and the current p95 in tabular mono. - Safe by default: small red requests fall onto an accent 'edge' line and burst there, while a 'Blocked today' counter climbs. At rest every demo idles at a quarter speed. Pointing at (or focusing) a card makes its demo run at full speed and raises its accent ring and glow, while the other two demos dim to 50%. One column below 44rem. Selected variant — Frost: accent="#b9cce4" (frost blue) for running dots, the sparkline, the edge line and the active ring.
Notes
- Interaction
- Hover or focus a card to run its demo at full speed; the others quieten.
- Motion
- Demos tick on intervals (full speed when active, 4× slower at rest); card background and demo ring transition 400ms.
- Accessibility
- Cards are links with real headings text; demos are decorative (aria-hidden). Focus behaves like hover. Reduced motion freezes the demos in a representative state.
- Responsive
- Container query stacks the cards below 44rem.
- On touch
- Tapping a card activates it; demos idle otherwise.