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All 29 in 29 Tailwind CSS Checkboxes
- 01Tailwind CSS Toggle Switch — iOS-Style SaaS Settings
- 02Tailwind Filter Chip Checkbox — Style Checkbox as Button
- 03Tailwind Pricing Plan Card Select — Checkbox-Style Selectable Cards
- 04Pure Tailwind CSS Accordion with Checkbox — No JavaScript
- 05Tailwind Indeterminate Checkbox — Select All with Tri-State
- 06Accessible Custom Checkbox in Tailwind CSS — WCAG Focus Ring
- 07Tailwind Slide Toggle with ON/OFF Labels — GPU translate3d
- 08Neon Glow Checkbox in Tailwind CSS — Dark Mode Gaming UI
- 09Animated SVG Checkmark in Tailwind CSS — stroke-dashoffset Draw
- 10Bouncy Checkbox Animation in Tailwind CSS — Spring cubic-bezier
- 11Glassmorphism Checkbox in Tailwind CSS — backdrop-blur Frosted Glass
- 12Neumorphism Checkbox in Tailwind CSS — Soft UI
- 13Liquid Fill Checkbox Animation in Tailwind CSS — Water Wave
- 14Rotating Ring Checkbox in Tailwind CSS — Spin-to-Check
- 15Brutalist Checkbox in Tailwind CSS — Neo-Brutalism Hard Shadow
- 16Animated Gradient Checkbox in Tailwind CSS — Rainbow Sweep
- 173D Flip Checkbox in Tailwind CSS — perspective & backface-hidden
- 18Material Ripple Checkbox in Tailwind CSS — State Layer & Wave
- 19Retro Pixel Art Checkbox in Tailwind CSS — 8-Bit Arcade Menu
- 20Tailwind CSS To-Do List Checkbox with Animated Strikethrough
- 21Gooey Blob Checkbox in Tailwind CSS — blur + contrast Filter
- 22Tailwind Dark Mode Toggle Switch — Sun & Moon, No JavaScript
- 23Pulse Ring Checkbox in Tailwind CSS — Live Status Indicator
- 24Tailwind CSS Dash-to-Check SVG Morph Checkbox
- 25Tri-State Checkbox in Tailwind CSS + JavaScript — Done / N/A / Unset
- 26Magnetic Hover Checkbox in Tailwind CSS + JavaScript
- 27Confetti Checkbox Animation in Tailwind CSS — Pure CSS Particle Burst
- 28Slide-In Label Checkbox in Tailwind CSS — Saved Tag Reveal
- 29Aurora Gradient Toggle Switch in Tailwind CSS — Premium Dark UI
Tailwind Dark Mode Toggle Switch — Sun & Moon, No JavaScript
A day/night switch that actually changes the theme around it: has-checked: on the stage and group-has-checked/stage: on the card recolour the whole demo, while the thumb morphs from a glowing sun into a cratered moon over a star field. Zero JavaScript.
Untitled UI Pro: 5,000+ React + Tailwind CSS v4 components · from $349 one-time
Untitled UI React · Affiliate link
The code
<section class="tcb-22 group/stage w-full min-h-svh grid place-items-center bg-tcb22-day px-5 py-14 font-tcb22-sans transition-colors duration-500 has-checked:bg-tcb22-night selection:bg-tcb22-sun selection:text-tcb22-ink motion-reduce:transition-none" aria-label="Dark mode toggle">
<label class="group flex cursor-pointer items-center gap-6 rounded-2xl border border-tcb22-line bg-white px-6.5 py-5 shadow-tcb22-card transition-colors duration-500 group-has-checked/stage:border-white/10 group-has-checked/stage:bg-tcb22-card motion-reduce:transition-none">
<span class="grid">
<span class="text-base font-semibold text-tcb22-ink transition-colors group-has-checked/stage:text-white">Dark mode</span>
<span class="text-[13px] text-tcb22-mut transition-colors group-has-checked/stage:text-tcb22-mutnight">Easier on the eyes at night</span>
</span>
<input type="checkbox" class="peer sr-only" checked>
<span aria-hidden="true" class="relative h-9 w-[76px] flex-none overflow-hidden rounded-full bg-linear-to-b from-tcb22-sky1 to-tcb22-sky2 peer-focus-visible:outline-3 peer-focus-visible:outline-offset-3 peer-focus-visible:outline-tcb22-ring">
<span class="absolute inset-0 bg-linear-to-b from-tcb22-sky3 to-tcb22-sky4 opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute inset-0 bg-[radial-gradient(1.5px_1.5px_at_18px_12px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_30px_24px,#fff_99%,transparent),radial-gradient(1px_1px_at_24px_8px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_40px_16px,#fff_99%,transparent),radial-gradient(1px_1px_at_12px_26px,#fff_99%,transparent)] opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute left-1 top-1 size-7 rounded-full bg-tcb22-sun shadow-tcb22-sun transition-[translate,background-color,box-shadow] duration-500 ease-[cubic-bezier(.4,.8,.3,1)] group-has-checked:translate-x-10 group-has-checked:bg-tcb22-moon group-has-checked:shadow-tcb22-moon motion-reduce:transition-none"></span>
</span>
</label>
</section><section class="tcb-22 group/stage w-full min-h-svh grid place-items-center bg-tcb22-day px-5 py-14 font-tcb22-sans transition-colors duration-500 has-checked:bg-tcb22-night selection:bg-tcb22-sun selection:text-tcb22-ink motion-reduce:transition-none" aria-label="Dark mode toggle">
<label class="group flex cursor-pointer items-center gap-6 rounded-2xl border border-tcb22-line bg-white px-6.5 py-5 shadow-tcb22-card transition-colors duration-500 group-has-checked/stage:border-white/10 group-has-checked/stage:bg-tcb22-card motion-reduce:transition-none">
<span class="grid">
<span class="text-base font-semibold text-tcb22-ink transition-colors group-has-checked/stage:text-white">Dark mode</span>
<span class="text-[13px] text-tcb22-mut transition-colors group-has-checked/stage:text-tcb22-mutnight">Easier on the eyes at night</span>
</span>
<input type="checkbox" class="peer sr-only" checked>
<span aria-hidden="true" class="relative h-9 w-[76px] flex-none overflow-hidden rounded-full bg-linear-to-b from-tcb22-sky1 to-tcb22-sky2 peer-focus-visible:outline-3 peer-focus-visible:outline-offset-3 peer-focus-visible:outline-tcb22-ring">
<span class="absolute inset-0 bg-linear-to-b from-tcb22-sky3 to-tcb22-sky4 opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute inset-0 bg-[radial-gradient(1.5px_1.5px_at_18px_12px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_30px_24px,#fff_99%,transparent),radial-gradient(1px_1px_at_24px_8px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_40px_16px,#fff_99%,transparent),radial-gradient(1px_1px_at_12px_26px,#fff_99%,transparent)] opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute left-1 top-1 size-7 rounded-full bg-tcb22-sun shadow-tcb22-sun transition-[translate,background-color,box-shadow] duration-500 ease-[cubic-bezier(.4,.8,.3,1)] group-has-checked:translate-x-10 group-has-checked:bg-tcb22-moon group-has-checked:shadow-tcb22-moon motion-reduce:transition-none"></span>
</span>
</label>
</section>@import "tailwindcss";
@theme {
--color-tcb22-day: #e9edf3;
--color-tcb22-day: oklch(0.94 0.01 255);
--color-tcb22-night: #0f1424;
--color-tcb22-night: oklch(0.18 0.035 270);
--color-tcb22-card: #1a2136;
--color-tcb22-card: oklch(0.24 0.04 270);
--color-tcb22-line: #e0e5ec;
--color-tcb22-line: oklch(0.92 0.01 255);
--color-tcb22-ink: #2a3140;
--color-tcb22-ink: oklch(0.3 0.025 260);
--color-tcb22-mut: #5b6474;
--color-tcb22-mut: oklch(0.49 0.025 260);
--color-tcb22-mutnight: #a3adc4;
--color-tcb22-mutnight: oklch(0.75 0.03 265);
--color-tcb22-sky1: #7ec8ff;
--color-tcb22-sky1: oklch(0.8 0.11 240);
--color-tcb22-sky2: #cdeeff;
--color-tcb22-sky2: oklch(0.93 0.05 225);
--color-tcb22-sky3: #1b2542;
--color-tcb22-sky3: oklch(0.25 0.05 270);
--color-tcb22-sky4: #2a3766;
--color-tcb22-sky4: oklch(0.33 0.08 270);
--color-tcb22-sun: #ffd76b;
--color-tcb22-sun: oklch(0.89 0.14 88);
--color-tcb22-moon: #e6ecf5;
--color-tcb22-moon: oklch(0.94 0.012 255);
--color-tcb22-ring: #4d7fff;
--color-tcb22-ring: oklch(0.62 0.2 265);
--font-tcb22-sans: 'Outfit', system-ui, sans-serif;
--shadow-tcb22-card: 0 18px 40px -30px rgb(16 24 40 / 0.5);
--shadow-tcb22-sun: 0 0 10px rgb(255 200 60 / 0.9);
--shadow-tcb22-moon: inset -8px 2px 0 0 #b9c4d6;
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
stage is sized before the browser build compiles. */
.tcb-22 {
width: 100%;
min-height: 100svh;
}@import "tailwindcss";
@theme {
--color-tcb22-day: #e9edf3;
--color-tcb22-day: oklch(0.94 0.01 255);
--color-tcb22-night: #0f1424;
--color-tcb22-night: oklch(0.18 0.035 270);
--color-tcb22-card: #1a2136;
--color-tcb22-card: oklch(0.24 0.04 270);
--color-tcb22-line: #e0e5ec;
--color-tcb22-line: oklch(0.92 0.01 255);
--color-tcb22-ink: #2a3140;
--color-tcb22-ink: oklch(0.3 0.025 260);
--color-tcb22-mut: #5b6474;
--color-tcb22-mut: oklch(0.49 0.025 260);
--color-tcb22-mutnight: #a3adc4;
--color-tcb22-mutnight: oklch(0.75 0.03 265);
--color-tcb22-sky1: #7ec8ff;
--color-tcb22-sky1: oklch(0.8 0.11 240);
--color-tcb22-sky2: #cdeeff;
--color-tcb22-sky2: oklch(0.93 0.05 225);
--color-tcb22-sky3: #1b2542;
--color-tcb22-sky3: oklch(0.25 0.05 270);
--color-tcb22-sky4: #2a3766;
--color-tcb22-sky4: oklch(0.33 0.08 270);
--color-tcb22-sun: #ffd76b;
--color-tcb22-sun: oklch(0.89 0.14 88);
--color-tcb22-moon: #e6ecf5;
--color-tcb22-moon: oklch(0.94 0.012 255);
--color-tcb22-ring: #4d7fff;
--color-tcb22-ring: oklch(0.62 0.2 265);
--font-tcb22-sans: 'Outfit', system-ui, sans-serif;
--shadow-tcb22-card: 0 18px 40px -30px rgb(16 24 40 / 0.5);
--shadow-tcb22-sun: 0 0 10px rgb(255 200 60 / 0.9);
--shadow-tcb22-moon: inset -8px 2px 0 0 #b9c4d6;
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
stage is sized before the browser build compiles. */
.tcb-22 {
width: 100%;
min-height: 100svh;
}Setup — do this once per project
Skip this if your project already runs Tailwind v4.
<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>
<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>Compiles in the browser — perfect for a CodePen or a quick test, not for production.
npm install tailwindcss @tailwindcss/vite
npm install tailwindcss @tailwindcss/vite// vite.config.js ("type": "module" in package.json)
import { defineConfig } from 'vite'
import tailwindcss from '@tailwindcss/vite'
export default defineConfig({
plugins: [tailwindcss()],
})// vite.config.js ("type": "module" in package.json)
import { defineConfig } from 'vite'
import tailwindcss from '@tailwindcss/vite'
export default defineConfig({
plugins: [tailwindcss()],
})Any v4 setup works — Vite, PostCSS or the CLI. Nothing in this demo is bundler-specific.
@import "tailwindcss";
@theme {
--color-tcb22-day: #e9edf3;
--color-tcb22-day: oklch(0.94 0.01 255);
--color-tcb22-night: #0f1424;
--color-tcb22-night: oklch(0.18 0.035 270);
--color-tcb22-card: #1a2136;
--color-tcb22-card: oklch(0.24 0.04 270);
--color-tcb22-line: #e0e5ec;
--color-tcb22-line: oklch(0.92 0.01 255);
--color-tcb22-ink: #2a3140;
--color-tcb22-ink: oklch(0.3 0.025 260);
--color-tcb22-mut: #5b6474;
--color-tcb22-mut: oklch(0.49 0.025 260);
--color-tcb22-mutnight: #a3adc4;
--color-tcb22-mutnight: oklch(0.75 0.03 265);
--color-tcb22-sky1: #7ec8ff;
--color-tcb22-sky1: oklch(0.8 0.11 240);
--color-tcb22-sky2: #cdeeff;
--color-tcb22-sky2: oklch(0.93 0.05 225);
--color-tcb22-sky3: #1b2542;
--color-tcb22-sky3: oklch(0.25 0.05 270);
--color-tcb22-sky4: #2a3766;
--color-tcb22-sky4: oklch(0.33 0.08 270);
--color-tcb22-sun: #ffd76b;
--color-tcb22-sun: oklch(0.89 0.14 88);
--color-tcb22-moon: #e6ecf5;
--color-tcb22-moon: oklch(0.94 0.012 255);
--color-tcb22-ring: #4d7fff;
--color-tcb22-ring: oklch(0.62 0.2 265);
--font-tcb22-sans: 'Outfit', system-ui, sans-serif;
--shadow-tcb22-card: 0 18px 40px -30px rgb(16 24 40 / 0.5);
--shadow-tcb22-sun: 0 0 10px rgb(255 200 60 / 0.9);
--shadow-tcb22-moon: inset -8px 2px 0 0 #b9c4d6;
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
stage is sized before the browser build compiles. */
.tcb-22 {
width: 100%;
min-height: 100svh;
}@import "tailwindcss";
@theme {
--color-tcb22-day: #e9edf3;
--color-tcb22-day: oklch(0.94 0.01 255);
--color-tcb22-night: #0f1424;
--color-tcb22-night: oklch(0.18 0.035 270);
--color-tcb22-card: #1a2136;
--color-tcb22-card: oklch(0.24 0.04 270);
--color-tcb22-line: #e0e5ec;
--color-tcb22-line: oklch(0.92 0.01 255);
--color-tcb22-ink: #2a3140;
--color-tcb22-ink: oklch(0.3 0.025 260);
--color-tcb22-mut: #5b6474;
--color-tcb22-mut: oklch(0.49 0.025 260);
--color-tcb22-mutnight: #a3adc4;
--color-tcb22-mutnight: oklch(0.75 0.03 265);
--color-tcb22-sky1: #7ec8ff;
--color-tcb22-sky1: oklch(0.8 0.11 240);
--color-tcb22-sky2: #cdeeff;
--color-tcb22-sky2: oklch(0.93 0.05 225);
--color-tcb22-sky3: #1b2542;
--color-tcb22-sky3: oklch(0.25 0.05 270);
--color-tcb22-sky4: #2a3766;
--color-tcb22-sky4: oklch(0.33 0.08 270);
--color-tcb22-sun: #ffd76b;
--color-tcb22-sun: oklch(0.89 0.14 88);
--color-tcb22-moon: #e6ecf5;
--color-tcb22-moon: oklch(0.94 0.012 255);
--color-tcb22-ring: #4d7fff;
--color-tcb22-ring: oklch(0.62 0.2 265);
--font-tcb22-sans: 'Outfit', system-ui, sans-serif;
--shadow-tcb22-card: 0 18px 40px -30px rgb(16 24 40 / 0.5);
--shadow-tcb22-sun: 0 0 10px rgb(255 200 60 / 0.9);
--shadow-tcb22-moon: inset -8px 2px 0 0 #b9c4d6;
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
stage is sized before the browser build compiles. */
.tcb-22 {
width: 100%;
min-height: 100svh;
}<link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&display=swap">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&display=swap">What changed in the port
Which parts became utilities, which stayed CSS, and why.
input:checked ~ .track .thumbbecamegroup-has-checked:; the track's gradient swap became a cross-fading overlay, because gradients don't interpolate.- The star field's four
radial-gradient()s became one arbitrarybg-[…]with underscores for spaces. - UI upgrade from the CSS original: the switch now themes its stage — page, card and text all flip to night via
has-checked:and a namedgroup/stage. The original moved a thumb and changed nothing else. - UI upgrade: a supporting sub-label, a fifth star, and the sky now truly cross-fades instead of snapping.
Here's a working CSS demo from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: Tailwind Dark Mode Toggle Switch — Sun & Moon, No JavaScript
Source: https://codefronts.com/components/tailwind-css-checkboxes/tailwind-dark-mode-toggle-sun-moon/
A day/night switch that actually changes the theme around it: has-checked: on the stage and group-has-checked/stage: on the card recolour the whole demo, while the thumb morphs from a glowing sun into a cratered moon over a star field. Zero JavaScript.
## HTML
```html
<section class="tcb-22 group/stage w-full min-h-svh grid place-items-center bg-tcb22-day px-5 py-14 font-tcb22-sans transition-colors duration-500 has-checked:bg-tcb22-night selection:bg-tcb22-sun selection:text-tcb22-ink motion-reduce:transition-none" aria-label="Dark mode toggle">
<label class="group flex cursor-pointer items-center gap-6 rounded-2xl border border-tcb22-line bg-white px-6.5 py-5 shadow-tcb22-card transition-colors duration-500 group-has-checked/stage:border-white/10 group-has-checked/stage:bg-tcb22-card motion-reduce:transition-none">
<span class="grid">
<span class="text-base font-semibold text-tcb22-ink transition-colors group-has-checked/stage:text-white">Dark mode</span>
<span class="text-[13px] text-tcb22-mut transition-colors group-has-checked/stage:text-tcb22-mutnight">Easier on the eyes at night</span>
</span>
<input type="checkbox" class="peer sr-only" checked>
<span aria-hidden="true" class="relative h-9 w-[76px] flex-none overflow-hidden rounded-full bg-linear-to-b from-tcb22-sky1 to-tcb22-sky2 peer-focus-visible:outline-3 peer-focus-visible:outline-offset-3 peer-focus-visible:outline-tcb22-ring">
<span class="absolute inset-0 bg-linear-to-b from-tcb22-sky3 to-tcb22-sky4 opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute inset-0 bg-[radial-gradient(1.5px_1.5px_at_18px_12px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_30px_24px,#fff_99%,transparent),radial-gradient(1px_1px_at_24px_8px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_40px_16px,#fff_99%,transparent),radial-gradient(1px_1px_at_12px_26px,#fff_99%,transparent)] opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute left-1 top-1 size-7 rounded-full bg-tcb22-sun shadow-tcb22-sun transition-[translate,background-color,box-shadow] duration-500 ease-[cubic-bezier(.4,.8,.3,1)] group-has-checked:translate-x-10 group-has-checked:bg-tcb22-moon group-has-checked:shadow-tcb22-moon motion-reduce:transition-none"></span>
</span>
</label>
</section>
```
## CSS
```css
@import "tailwindcss";
@theme {
--color-tcb22-day: #e9edf3;
--color-tcb22-day: oklch(0.94 0.01 255);
--color-tcb22-night: #0f1424;
--color-tcb22-night: oklch(0.18 0.035 270);
--color-tcb22-card: #1a2136;
--color-tcb22-card: oklch(0.24 0.04 270);
--color-tcb22-line: #e0e5ec;
--color-tcb22-line: oklch(0.92 0.01 255);
--color-tcb22-ink: #2a3140;
--color-tcb22-ink: oklch(0.3 0.025 260);
--color-tcb22-mut: #5b6474;
--color-tcb22-mut: oklch(0.49 0.025 260);
--color-tcb22-mutnight: #a3adc4;
--color-tcb22-mutnight: oklch(0.75 0.03 265);
--color-tcb22-sky1: #7ec8ff;
--color-tcb22-sky1: oklch(0.8 0.11 240);
--color-tcb22-sky2: #cdeeff;
--color-tcb22-sky2: oklch(0.93 0.05 225);
--color-tcb22-sky3: #1b2542;
--color-tcb22-sky3: oklch(0.25 0.05 270);
--color-tcb22-sky4: #2a3766;
--color-tcb22-sky4: oklch(0.33 0.08 270);
--color-tcb22-sun: #ffd76b;
--color-tcb22-sun: oklch(0.89 0.14 88);
--color-tcb22-moon: #e6ecf5;
--color-tcb22-moon: oklch(0.94 0.012 255);
--color-tcb22-ring: #4d7fff;
--color-tcb22-ring: oklch(0.62 0.2 265);
--font-tcb22-sans: 'Outfit', system-ui, sans-serif;
--shadow-tcb22-card: 0 18px 40px -30px rgb(16 24 40 / 0.5);
--shadow-tcb22-sun: 0 0 10px rgb(255 200 60 / 0.9);
--shadow-tcb22-moon: inset -8px 2px 0 0 #b9c4d6;
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
stage is sized before the browser build compiles. */
.tcb-22 {
width: 100%;
min-height: 100svh;
}
```Here's a working CSS demo from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: Tailwind Dark Mode Toggle Switch — Sun & Moon, No JavaScript
Source: https://codefronts.com/components/tailwind-css-checkboxes/tailwind-dark-mode-toggle-sun-moon/
A day/night switch that actually changes the theme around it: has-checked: on the stage and group-has-checked/stage: on the card recolour the whole demo, while the thumb morphs from a glowing sun into a cratered moon over a star field. Zero JavaScript.
## HTML
```html
<section class="tcb-22 group/stage w-full min-h-svh grid place-items-center bg-tcb22-day px-5 py-14 font-tcb22-sans transition-colors duration-500 has-checked:bg-tcb22-night selection:bg-tcb22-sun selection:text-tcb22-ink motion-reduce:transition-none" aria-label="Dark mode toggle">
<label class="group flex cursor-pointer items-center gap-6 rounded-2xl border border-tcb22-line bg-white px-6.5 py-5 shadow-tcb22-card transition-colors duration-500 group-has-checked/stage:border-white/10 group-has-checked/stage:bg-tcb22-card motion-reduce:transition-none">
<span class="grid">
<span class="text-base font-semibold text-tcb22-ink transition-colors group-has-checked/stage:text-white">Dark mode</span>
<span class="text-[13px] text-tcb22-mut transition-colors group-has-checked/stage:text-tcb22-mutnight">Easier on the eyes at night</span>
</span>
<input type="checkbox" class="peer sr-only" checked>
<span aria-hidden="true" class="relative h-9 w-[76px] flex-none overflow-hidden rounded-full bg-linear-to-b from-tcb22-sky1 to-tcb22-sky2 peer-focus-visible:outline-3 peer-focus-visible:outline-offset-3 peer-focus-visible:outline-tcb22-ring">
<span class="absolute inset-0 bg-linear-to-b from-tcb22-sky3 to-tcb22-sky4 opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute inset-0 bg-[radial-gradient(1.5px_1.5px_at_18px_12px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_30px_24px,#fff_99%,transparent),radial-gradient(1px_1px_at_24px_8px,#fff_99%,transparent),radial-gradient(1.5px_1.5px_at_40px_16px,#fff_99%,transparent),radial-gradient(1px_1px_at_12px_26px,#fff_99%,transparent)] opacity-0 transition-opacity duration-500 group-has-checked:opacity-100"></span>
<span class="absolute left-1 top-1 size-7 rounded-full bg-tcb22-sun shadow-tcb22-sun transition-[translate,background-color,box-shadow] duration-500 ease-[cubic-bezier(.4,.8,.3,1)] group-has-checked:translate-x-10 group-has-checked:bg-tcb22-moon group-has-checked:shadow-tcb22-moon motion-reduce:transition-none"></span>
</span>
</label>
</section>
```
## CSS
```css
@import "tailwindcss";
@theme {
--color-tcb22-day: #e9edf3;
--color-tcb22-day: oklch(0.94 0.01 255);
--color-tcb22-night: #0f1424;
--color-tcb22-night: oklch(0.18 0.035 270);
--color-tcb22-card: #1a2136;
--color-tcb22-card: oklch(0.24 0.04 270);
--color-tcb22-line: #e0e5ec;
--color-tcb22-line: oklch(0.92 0.01 255);
--color-tcb22-ink: #2a3140;
--color-tcb22-ink: oklch(0.3 0.025 260);
--color-tcb22-mut: #5b6474;
--color-tcb22-mut: oklch(0.49 0.025 260);
--color-tcb22-mutnight: #a3adc4;
--color-tcb22-mutnight: oklch(0.75 0.03 265);
--color-tcb22-sky1: #7ec8ff;
--color-tcb22-sky1: oklch(0.8 0.11 240);
--color-tcb22-sky2: #cdeeff;
--color-tcb22-sky2: oklch(0.93 0.05 225);
--color-tcb22-sky3: #1b2542;
--color-tcb22-sky3: oklch(0.25 0.05 270);
--color-tcb22-sky4: #2a3766;
--color-tcb22-sky4: oklch(0.33 0.08 270);
--color-tcb22-sun: #ffd76b;
--color-tcb22-sun: oklch(0.89 0.14 88);
--color-tcb22-moon: #e6ecf5;
--color-tcb22-moon: oklch(0.94 0.012 255);
--color-tcb22-ring: #4d7fff;
--color-tcb22-ring: oklch(0.62 0.2 265);
--font-tcb22-sans: 'Outfit', system-ui, sans-serif;
--shadow-tcb22-card: 0 18px 40px -30px rgb(16 24 40 / 0.5);
--shadow-tcb22-sun: 0 0 10px rgb(255 200 60 / 0.9);
--shadow-tcb22-moon: inset -8px 2px 0 0 #b9c4d6;
}
/* Root rule: the full-bleed contract, stated in CSS as well as in the markup's utilities, so the
stage is sized before the browser build compiles. */
.tcb-22 {
width: 100%;
min-height: 100svh;
}
```How this works
State can flow up. Because :has() lets an ancestor read the checkbox, the section itself carries has-checked:bg-tcb22-night, and a named group (group/stage) lets the card and text restyle too. For a site-wide toggle, put the same variant on <html> via @custom-variant dark (&:where(:root:has(#theme:checked) *)).
The moon is a shadow. A large inset shadow in the moon's shade, offset left, leaves a crescent of light — no extra element.
Make it yours
- Site-wide: define
@custom-variant darkkeyed to the toggle and usedark:everywhere. - Persist: a 3-line script can save
checkedtolocalStorage. - System default: initialise
checkedfromprefers-color-scheme. - More stars: add radial gradients to the arbitrary background.
Gotchas — read before shipping
- Without JS the choice isn't remembered across pages.
- Transitioning
background-imagegradients doesn't interpolate — the track cross-fades via its star layer instead. - Keep the label text inside the themed card so its contrast flips with the background.
Browser support
| Chrome | Safari | Firefox | Edge |
|---|---|---|---|
| 111+ | 16.4+ | 128+ | 111+ |
:has() for page theming needs Firefox 121+; older engines still flip the switch.