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No.214 · Authentication

Consent Sign-in

A split OAuth sign-in with a drifting constellation, hand-drawn dividers, and providers that unlock only after consent.

The prompt

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

Design a two-panel sign-in page on a warm near-black canvas. The left 45% is an atmospheric panel: a deep night backdrop (a dark veil over a warm city-glow gradient — swap in a photograph if you have one), a canvas constellation of 20 amber nodes drifting slowly (speed 0.12, gentle damping, bouncing off the edges) connected by lines whose opacity fades with distance (link radius ~12% of the width), rendered at ~30fps and paused offscreen. Over it: a mono "back to home" link, a large headline whose last phrase is an italic serif, a muted lead, and a mono uppercase brand line at the bottom. Between the panels, instead of a straight border, draw a tall hand-drawn squiggle (an SVG path with preserveAspectRatio="none") that sketches itself in on mount. The right side centres a 26rem form, bracketed top and bottom by short hand-drawn wavy rules that also draw in (380ms, ease-out-expo): a mono "Sign in" eyebrow, a 600-weight title, a muted subtitle, three full-width OAuth provider buttons (brand marks + label, hairline border, 6px radius), and a consent checkbox with an amber inline link. The providers stay disabled at 45% opacity with a not-allowed cursor until the consent box is ticked; once enabled they gain an amber border on hover and focus. The checkbox is a real input with a custom 20px box that fills amber and fades in a check. On narrow containers the left panel disappears and the back link moves above the form.

Notes

Interaction
Tick consent to enable the provider buttons; hover/focus an enabled provider for the amber border. The constellation drifts on its own.
Motion
Sketch rules draw on mount (380ms; the tall divider 900ms). Canvas at ~30fps, paused offscreen and in hidden tabs. Buttons/checkbox 200ms.
Accessibility
Page <h1>, a labelled form, real <button>s that are truly disabled until consent (with a visually hidden hint linked via aria-describedby), and a native checkbox. Decorative canvas and rules are aria-hidden. Reduced motion skips the canvas and shows rules drawn.
Responsive
Container queries: split layout from 48rem; below that a single centred column with the back link on top.
On touch
Nothing is hover-dependent.

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