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No.54 · Controls

Eclipse Toggle

A day/night switch drawn as a tiny sky: the sun sinks behind the hills as the moon rises, clouds drift out and the stars come on.

The prompt

The design brief behind this component — reuse it to regenerate, remix, or explain it.

Build a dark-mode switch (a <button role="switch" aria-checked>, 96×44px, or 132×60 large) drawn as a small landscape, in CSS only. The track is a sky: a blue gradient (#5fb2ff → #bfe3ff) with an inset shadow, with a night gradient (#070d24 → #22305c) layered over it whose opacity crossfades over 700ms. A curved hill sits along the bottom and darkens at night. The sun is a 34px disc (warm radial gradient, a soft glow ring) at the left. Switching to night it moves right and down behind the hills — a translate of 42% of the width across and 90% of the height down on one cubic-bezier(0.65,0,0.35,1), so it reads as setting along an arc — and fades. At the same time the moon (a pale disc with two crater spots and a shaded edge) rises from behind the hills on the right along the mirrored path. Two clouds (pill shapes with a puff) drift out to the right and fade; seven 2px stars fade in and twinkle on staggered 2.4s loops. Switching back reverses everything. Pressing dips the sky to 97%. Focus shows a ring in sun or moon colour. Controlled or uncontrolled; reduced motion makes every change instant.

Notes

Interaction
Click, tap, Space or Enter flips between day and night.
Motion
Sun and moon travel 700ms cubic-bezier(0.65,0,0.35,1); sky crossfade 700ms; stars fade in after 200ms and twinkle every 2.4s.
Accessibility
A real switch: role="switch", aria-checked and a label ("Dark mode"); everything inside is decorative and aria-hidden. Reduced motion removes the travel and twinkle.
Responsive
Two sizes; everything inside is sized from CSS variables, so it scales cleanly.
On touch
Works the same on touch; the press dip gives tap feedback.

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