0.5 mm, for small notes1.0 mm, everyday writing1.8 mm, signatures
Lux
React + Tailwind
import { useId } from 'react';
const OPTIONS = [{"value": "dim", "label": "Dim"}, {"value": "soft", "label": "Soft"}, {"value": "bright", "label": "Bright"}];
const css = `
.radio-lux { --i: 1; display: grid; justify-items: center; gap: 10px; width: 260px; }
.radio-lux:has(.radio-lux__opt:nth-child(1) input:checked) { --i: 0; }
.radio-lux:has(.radio-lux__opt:nth-child(2) input:checked) { --i: 1; }
.radio-lux:has(.radio-lux__opt:nth-child(3) input:checked) { --i: 2; }
.radio-lux__room { position: relative; width: 200px; height: 118px; }
.radio-lux__cord { position: absolute; left: 50%; top: 0; width: 1.5px; height: 22px; margin-left: -0.75px; background: light-dark(#6d7179, #7d8087); }
.radio-lux__shade { position: absolute; left: 50%; top: 22px; width: 46px; height: 20px; margin-left: -23px; background: light-dark(#6d7179, #7d8087); clip-path: polygon(30% 0, 70% 0, 100% 100%, 0 100%); }
.radio-lux__bulb { position: absolute; left: 50%; top: 38px; width: 12px; height: 8px; margin-left: -6px; border-radius: 0 0 6px 6px; background: light-dark(#373a40, #f1f2f3); box-shadow: 0 0 calc(var(--g) * 22px) calc(var(--g) * 6px) color-mix(in oklab, light-dark(#373a40, #f1f2f3) 60%, transparent); transition: box-shadow 0.5s; }
.radio-lux__beam { position: absolute; left: 50%; top: 42px; width: 180px; height: 66px; margin-left: -90px; background: linear-gradient(color-mix(in oklab, light-dark(#373a40, #f1f2f3) 32%, transparent), transparent); clip-path: polygon(calc(50% - 23px) 0, calc(50% + 23px) 0, calc(50% + 90px * var(--w)) 100%, calc(50% - 90px * var(--w)) 100%); opacity: var(--g); transition: opacity 0.5s, clip-path 0.5s; }
.radio-lux__table { position: absolute; left: 22px; right: 22px; bottom: 6px; height: 5px; border-radius: 3px; background: light-dark(#cbced3, #393c41); }
.radio-lux__pool { position: absolute; left: 50%; bottom: 8px; width: 150px; height: 14px; margin-left: -75px; border-radius: 50%; background: radial-gradient(closest-side, color-mix(in oklab, light-dark(#373a40, #f1f2f3) 45%, transparent), transparent); opacity: var(--g); transform: scaleX(var(--w)); transition: opacity 0.5s, transform 0.5s; }
.radio-lux:has(.radio-lux__opt:nth-child(1) input:checked) { --g: 0.22; --w: 0.55; }
.radio-lux:has(.radio-lux__opt:nth-child(2) input:checked) { --g: 0.5; --w: 0.8; }
.radio-lux:has(.radio-lux__opt:nth-child(3) input:checked) { --g: 0.9; --w: 1.0; }
.radio-lux__read { display: grid; color: light-dark(#50535b, #c6c8cd); font-size: 12px; font-variant-numeric: tabular-nums; }
.radio-lux__read > * { grid-area: 1 / 1; text-align: center; opacity: 0; transform: translateY(4px); transition: opacity 0.25s, transform 0.3s; }
.radio-lux:has(.radio-lux__opt:nth-child(1) input:checked) .radio-lux__read > :nth-child(1) { opacity: 1; transform: none; }
.radio-lux:has(.radio-lux__opt:nth-child(2) input:checked) .radio-lux__read > :nth-child(2) { opacity: 1; transform: none; }
.radio-lux:has(.radio-lux__opt:nth-child(3) input:checked) .radio-lux__read > :nth-child(3) { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
.radio-lux * { transition: none !important; }
}
.radio-lux__opts { display: flex; gap: 3px; padding: 4px; border-radius: 12px; background: light-dark(#f3f4f7, #1a1c1f); box-shadow: inset 0 0 0 1px light-dark(#dbdde1, #2e3035); }
.radio-lux__opt { position: relative; flex: 1; padding: 7px 10px; border-radius: 8px; color: light-dark(#5f626a, #a7abb2); font-size: 12.5px; font-weight: 500; text-align: center; white-space: nowrap; cursor: pointer; transition: background-color 0.25s, color 0.25s; }
.radio-lux__opt:hover { color: light-dark(#42454c, #e5e6e9); }
.radio-lux__opt:has(input:checked) { background: light-dark(#373a40, #f1f2f3); color: light-dark(#fbfcfd, #121417); }
.radio-lux__opt:has(input:focus-visible) { outline: 2px solid light-dark(#50535b, #c6c8cd); outline-offset: 2px; }
.radio-lux__input { position: absolute; width: 1px; height: 1px; margin: 0; opacity: 0; pointer-events: none; }
`;
export function LuxRadio() {
const name = useId();
return (
<>
<style>
{css}
</style>
<div className="radio-lux">
<div className="radio-lux__room" aria-hidden="true">
<span className="radio-lux__beam" />
<span className="radio-lux__pool" />
<span className="radio-lux__cord" />
<span className="radio-lux__shade" />
<span className="radio-lux__bulb" />
<span className="radio-lux__table" />
</div>
<span className="radio-lux__read" aria-hidden="true">
<span>15% · reading nook</span>
<span>50% · dinner</span>
<span>100% · working</span>
</span>
<div className="radio-lux__opts" role="radiogroup" aria-label="Light level">
{OPTIONS.map((o, i) => (
<label key={o.value} className="radio-lux__opt">
<input className="radio-lux__input" type="radio" name={name} value={o.value} defaultChecked={i === 1} />
{o.label}
</label>
))}
</div>
</div>
</>
);
}Markup where the component goes, CSS in your stylesheet. No JavaScript.
HTML
<div class="radio-lux">
<div class="radio-lux__room" aria-hidden="true">
<span class="radio-lux__beam"></span>
<span class="radio-lux__pool"></span>
<span class="radio-lux__cord"></span>
<span class="radio-lux__shade"></span>
<span class="radio-lux__bulb"></span>
<span class="radio-lux__table"></span>
</div>
<span class="radio-lux__read" aria-hidden="true">
<span>15% · reading nook</span>
<span>50% · dinner</span>
<span>100% · working</span>
</span>
<div class="radio-lux__opts" role="radiogroup" aria-label="Light level">
<label class="radio-lux__opt"><input class="radio-lux__input" type="radio" name="radio-lux" value="dim"/>Dim</label>
<label class="radio-lux__opt"><input class="radio-lux__input" type="radio" name="radio-lux" checked="" value="soft"/>Soft</label>
<label class="radio-lux__opt"><input class="radio-lux__input" type="radio" name="radio-lux" value="bright"/>Bright</label>
</div>
</div>CSS
.radio-lux { --i: 1; display: grid; justify-items: center; gap: 10px; width: 260px; }
.radio-lux:has(.radio-lux__opt:nth-child(1) input:checked) { --i: 0; }
.radio-lux:has(.radio-lux__opt:nth-child(2) input:checked) { --i: 1; }
.radio-lux:has(.radio-lux__opt:nth-child(3) input:checked) { --i: 2; }
.radio-lux__room { position: relative; width: 200px; height: 118px; }
.radio-lux__cord { position: absolute; left: 50%; top: 0; width: 1.5px; height: 22px; margin-left: -0.75px; background: light-dark(#6d7179, #7d8087); }
.radio-lux__shade { position: absolute; left: 50%; top: 22px; width: 46px; height: 20px; margin-left: -23px; background: light-dark(#6d7179, #7d8087); clip-path: polygon(30% 0, 70% 0, 100% 100%, 0 100%); }
.radio-lux__bulb { position: absolute; left: 50%; top: 38px; width: 12px; height: 8px; margin-left: -6px; border-radius: 0 0 6px 6px; background: light-dark(#373a40, #f1f2f3); box-shadow: 0 0 calc(var(--g) * 22px) calc(var(--g) * 6px) color-mix(in oklab, light-dark(#373a40, #f1f2f3) 60%, transparent); transition: box-shadow 0.5s; }
.radio-lux__beam { position: absolute; left: 50%; top: 42px; width: 180px; height: 66px; margin-left: -90px; background: linear-gradient(color-mix(in oklab, light-dark(#373a40, #f1f2f3) 32%, transparent), transparent); clip-path: polygon(calc(50% - 23px) 0, calc(50% + 23px) 0, calc(50% + 90px * var(--w)) 100%, calc(50% - 90px * var(--w)) 100%); opacity: var(--g); transition: opacity 0.5s, clip-path 0.5s; }
.radio-lux__table { position: absolute; left: 22px; right: 22px; bottom: 6px; height: 5px; border-radius: 3px; background: light-dark(#cbced3, #393c41); }
.radio-lux__pool { position: absolute; left: 50%; bottom: 8px; width: 150px; height: 14px; margin-left: -75px; border-radius: 50%; background: radial-gradient(closest-side, color-mix(in oklab, light-dark(#373a40, #f1f2f3) 45%, transparent), transparent); opacity: var(--g); transform: scaleX(var(--w)); transition: opacity 0.5s, transform 0.5s; }
.radio-lux:has(.radio-lux__opt:nth-child(1) input:checked) { --g: 0.22; --w: 0.55; }
.radio-lux:has(.radio-lux__opt:nth-child(2) input:checked) { --g: 0.5; --w: 0.8; }
.radio-lux:has(.radio-lux__opt:nth-child(3) input:checked) { --g: 0.9; --w: 1.0; }
.radio-lux__read { display: grid; color: light-dark(#50535b, #c6c8cd); font-size: 12px; font-variant-numeric: tabular-nums; }
.radio-lux__read > * { grid-area: 1 / 1; text-align: center; opacity: 0; transform: translateY(4px); transition: opacity 0.25s, transform 0.3s; }
.radio-lux:has(.radio-lux__opt:nth-child(1) input:checked) .radio-lux__read > :nth-child(1) { opacity: 1; transform: none; }
.radio-lux:has(.radio-lux__opt:nth-child(2) input:checked) .radio-lux__read > :nth-child(2) { opacity: 1; transform: none; }
.radio-lux:has(.radio-lux__opt:nth-child(3) input:checked) .radio-lux__read > :nth-child(3) { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
.radio-lux * { transition: none !important; }
}
.radio-lux__opts { display: flex; gap: 3px; padding: 4px; border-radius: 12px; background: light-dark(#f3f4f7, #1a1c1f); box-shadow: inset 0 0 0 1px light-dark(#dbdde1, #2e3035); }
.radio-lux__opt { position: relative; flex: 1; padding: 7px 10px; border-radius: 8px; color: light-dark(#5f626a, #a7abb2); font-size: 12.5px; font-weight: 500; text-align: center; white-space: nowrap; cursor: pointer; transition: background-color 0.25s, color 0.25s; }
.radio-lux__opt:hover { color: light-dark(#42454c, #e5e6e9); }
.radio-lux__opt:has(input:checked) { background: light-dark(#373a40, #f1f2f3); color: light-dark(#fbfcfd, #121417); }
.radio-lux__opt:has(input:focus-visible) { outline: 2px solid light-dark(#50535b, #c6c8cd); outline-offset: 2px; }
.radio-lux__input { position: absolute; width: 1px; height: 1px; margin: 0; opacity: 0; pointer-events: none; }Goal: Create a "Lux" radio.
Visual behavior: A light level picker drawn as a pendant lamp over a table: its beam and the pool of light on the table widen and brighten with each level.
Technique:
- Real native radios (visually hidden: absolute, 1x1, opacity 0) inside <label>s; the scene is aria-hidden and every state is read from the checked input with :has().
- Each level sets a glow (--g) and a width (--w) on the root with :has().
- The bulb's box-shadow grows with --g, the beam is a clip-path trapezoid whose lower edge spreads with --w, and the pool is a radial gradient that scales with --w and fades with --g.
- A short readout under the scene cross-fades to the chosen option's line. Pure CSS, no script.
Accessibility: A role="radiogroup" with an aria-label around native radio inputs sharing one name, so the arrow keys move the choice and Tab enters the group once; :focus-visible on the input outlines its option. Under prefers-reduced-motion the light changes instantly.
My stack: {{USER_STACK}}
My styling: {{USER_STYLING}}
My constraints: {{USER_CONSTRAINTS}}
My colors: neutral only. Black, white and grays, no hues. Use the color values above as written, or my project's closest neutral tokens.
Return a single self-contained component. No dependencies.Goal: Create a "Lux" radio.
Visual behavior: A light level picker drawn as a pendant lamp over a table: its beam and the pool of light on the table widen and brighten with each level.
Technique:
- Real native radios (visually hidden: absolute, 1x1, opacity 0) inside <label>s; the scene is aria-hidden and every state is read from the checked input with :has().
- Each level sets a glow (--g) and a width (--w) on the root with :has().
- The bulb's box-shadow grows with --g, the beam is a clip-path trapezoid whose lower edge spreads with --w, and the pool is a radial gradient that scales with --w and fades with --g.
- A short readout under the scene cross-fades to the chosen option's line. Pure CSS, no script.
Accessibility: A role="radiogroup" with an aria-label around native radio inputs sharing one name, so the arrow keys move the choice and Tab enters the group once; :focus-visible on the input outlines its option. Under prefers-reduced-motion the light changes instantly.
My stack: {{USER_STACK}}
My styling: {{USER_STYLING}}
My constraints: {{USER_CONSTRAINTS}}
My colors: use my project's existing color tokens. The color values above are grayscale placeholders. Map each one by its role (surface, text, border, accent, glow) to my theme, and keep their relative lightness so contrast and the effect still read.
Return a single self-contained component. No dependencies.Paste into Claude, ChatGPT or Cursor after filling in {{USER_STACK}}, {{USER_STYLING}} and {{USER_CONSTRAINTS}}. Neutral keeps the greys you see here; Match my project asks the model to map them onto your own colour tokens.
Free to use in any project, commercial included. MIT-0, no attribution required. Licence
About this component
A light level picker drawn as a pendant lamp over a table: its beam and the pool of light on the table widen and brighten with each level.
- Dependencies
- None
- Difficulty
- Beginner
- Triggers
- click, state change, glow
- Techniques
- css variables, clip path, radial gradient, css transition
- Reduced motion
- Respected
- Theme
- Light and dark (follows your page's color-scheme)
A role="radiogroup" with an aria-label around native radio inputs sharing one name, so the arrow keys move the choice and Tab enters the group once; :focus-visible on the input outlines its option. Under prefers-reduced-motion the light changes instantly.