20 Tailwind CSS Kbd Keys
04 / 20

All 20 in 20 Tailwind CSS Kbd Keys

  1. 01Tailwind CSS Kbd Tag Styling for Inline Keyboard Keys
  2. 02Tailwind 3D Keycap Button with Press-Down Effect
  3. 03Tailwind Keyboard Shortcut Combo with Plus Separators
  4. 04Flat Minimalist Tailwind Kbd Key for Body Text
  5. 05Responsive Tailwind Kbd Sizing with Em Units
  6. 06Tailwind Mac Cmd vs Windows Ctrl Shortcut Toggle
  7. 07Tailwind Arrow Keys and Navigation Key Layout
  8. 08Auto-Detect OS Keyboard Shortcuts (Cmd or Ctrl) in Tailwind
  9. 09Tailwind Keyboard Layout with Function Keys and Space Bar
  10. 10Tailwind Icon Keycaps with Inline SVG
  11. 11Tailwind Search Input with Cmd+K Shortcut Hint
  12. 12Tailwind Keyboard Shortcuts Cheat Sheet Grid
  13. 13Tailwind Tooltip with Keyboard Shortcut Hint
  14. 14Tailwind Keyboard Shortcut Settings Table
  15. 15Live Key Press Visualizer with Tailwind CSS
  16. 16Neumorphic Keycap Design in Tailwind CSS
  17. 17Glassmorphism Keyboard Keys in Tailwind CSS
  18. 18Retro Typewriter Round Keys in Tailwind CSS
  19. 19Terminal-Style Monospace Kbd Keys in Tailwind
  20. 20Dark Mode Kbd Keys with Tailwind CSS Variables
Pure TailwindMIT licensed

Flat Minimalist Tailwind Kbd Key for Body Text

For prose that mentions a dozen keys, the raised cap gets noisy. This flat treatment is a tinted chip — no border, no edge — with a faint inset ring-kbd04-rim/50 so it stays perceivable on any surface. Side-by-side cards compare it to the raised cap so the reader can see which to reach for.

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The code

<section class="kbd-04 relative w-full min-h-svh scheme-light kbd04-dark:scheme-dark bg-kbd04-bg text-kbd04-ink" aria-label="Flat minimalist kbd key demo">
  <div class="grid min-h-svh place-items-center px-5 pt-20 pb-12">
    <article class="w-full min-w-0 max-w-[36rem]">
      <h2 class="mb-4 font-kbd04-serif text-[clamp(26px,5vw,34px)] font-semibold leading-tight tracking-[-0.01em]">Selection and navigation</h2>
      <p class="mb-4 font-kbd04-serif text-[clamp(16px,3.4vw,18px)] leading-[1.75] text-pretty">Hold <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Shift</kbd> and use the arrow keys to grow the selection by one character, or add <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Alt</kbd> to grow it by one word. <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Home</kbd> and <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">End</kbd> jump to the ends of the visual line; add <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> to jump to the ends of the document instead. Numbered tabs respond to <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> plus <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">1</kbd> through <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">9</kbd>, and <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> plus <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">0</kbd> returns to the last one you looked at.</p>
      <p class="mb-7 font-kbd04-serif text-[clamp(16px,3.4vw,18px)] italic leading-[1.75] text-kbd04-mut">Twelve keys in two paragraphs, and the page still reads as prose. That is the argument for the flat treatment.</p>
      <div class="grid gap-3 sm:grid-cols-2">
        <div class="min-w-0 rounded-xl border border-kbd04-rule bg-kbd04-card p-4"><p class="mb-2 font-kbd04-sans text-[10.5px] font-semibold uppercase tracking-[0.16em] text-kbd04-acc">Flat · this demo</p><p class="font-kbd04-serif text-[17px]">Press <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">K</kbd> to search.</p><p class="mt-2 font-kbd04-sans text-[13px] leading-snug text-kbd04-mut">Reference prose, changelogs, dense help pages.</p></div>
        <div class="min-w-0 rounded-xl border border-kbd04-rule bg-kbd04-card p-4"><p class="mb-2 font-kbd04-sans text-[10.5px] font-semibold uppercase tracking-[0.16em] text-kbd04-acc">Raised · demo 01</p><p class="font-kbd04-serif text-[17px]">Press <kbd class="inline-block whitespace-nowrap rounded-[0.3em] border border-kbd04-rim bg-kbd04-card px-[0.5em] py-[0.24em] align-[0.06em] font-kbd04-sans text-[0.8em] font-semibold leading-none text-kbd04-capink shadow-[0_1px_0_var(--color-kbd04-edge)]">Ctrl</kbd> <kbd class="inline-block whitespace-nowrap rounded-[0.3em] border border-kbd04-rim bg-kbd04-card px-[0.5em] py-[0.24em] align-[0.06em] font-kbd04-sans text-[0.8em] font-semibold leading-none text-kbd04-capink shadow-[0_1px_0_var(--color-kbd04-edge)]">K</kbd> to search.</p><p class="mt-2 font-kbd04-sans text-[13px] leading-snug text-kbd04-mut">Tips, callouts, first-run hints — one shortcut at a time.</p></div>
      </div>
    </article>
  </div>
  <div class="absolute top-3.5 right-4 z-10">
    <input id="kbd-04-theme" type="checkbox" class="peer sr-only">
    <label for="kbd-04-theme" class="inline-flex min-h-11 cursor-pointer select-none items-center gap-2.5 rounded-full border border-current/55 px-4 font-sans text-[11px] font-bold uppercase leading-none tracking-[0.16em] text-kbd04-ink transition-colors hover:border-current peer-focus-visible:outline-3 peer-focus-visible:outline-offset-2 peer-focus-visible:outline-kbd04-acc">
      <span aria-hidden="true" class="size-3 flex-none rounded-full bg-current transition-[background-color,box-shadow] duration-300 kbd04-dark:bg-transparent kbd04-dark:shadow-[inset_-4px_-2px_0_0_currentColor] motion-reduce:transition-none"></span>
      <span class="kbd04-dark:hidden">Light</span><span class="hidden kbd04-dark:inline">Dark</span><span class="sr-only"> theme</span>
    </label>
  </div>
</section>
@import "tailwindcss";
/* Theme state: follows the OS; the corner switch flips it for THIS demo only. */

@custom-variant kbd04-dark {
  @media (prefers-color-scheme: dark) {
    &:where(.kbd-04:not(:has(#kbd-04-theme:checked)), .kbd-04:not(:has(#kbd-04-theme:checked)) *) {
      @slot;
    }
  }

  @media (prefers-color-scheme: light) {
    &:where(.kbd-04:has(#kbd-04-theme:checked), .kbd-04:has(#kbd-04-theme:checked) *) {
      @slot;
    }
  }
}
/* Every colour is light-dark(day, night): the root's scheme-light / scheme-dark utility picks the side. */

@theme {
  --color-kbd04-bg: light-dark(#fbfbf9, #141513);
  --color-kbd04-bg: light-dark(oklch(0.988 0.003 106.4), oklch(0.194 0.004 128.7));
  --color-kbd04-card: light-dark(#ffffff, #1c1d1a);
  --color-kbd04-card: light-dark(oklch(1 0 0), oklch(0.229 0.006 121.9));
  --color-kbd04-ink: light-dark(#1f211d, #e9eae5);
  --color-kbd04-ink: light-dark(oklch(0.244 0.008 128.8), oklch(0.935 0.007 115.7));
  --color-kbd04-mut: light-dark(#585c53, #a3a79c);
  --color-kbd04-mut: light-dark(oklch(0.468 0.015 126.6), oklch(0.722 0.016 123.1));
  --color-kbd04-rule: light-dark(#e3e4dd, #2c2e29);
  --color-kbd04-rule: light-dark(oklch(0.916 0.009 113.2), oklch(0.297 0.009 124.8));
  --color-kbd04-cap: light-dark(#ecede6, #2a2c27);
  --color-kbd04-cap: light-dark(oklch(0.943 0.009 113.2), oklch(0.289 0.009 124.8));
  --color-kbd04-capink: light-dark(#2b2e28, #e4e6df);
  --color-kbd04-capink: light-dark(oklch(0.296 0.011 128.9), oklch(0.921 0.01 119.6));
  --color-kbd04-rim: light-dark(#bfc2b6, #4a4e44);
  --color-kbd04-rim: light-dark(oklch(0.808 0.017 118.2), oklch(0.417 0.017 124.9));
  --color-kbd04-edge: light-dark(#b5b8ac, #0a0b09);
  --color-kbd04-edge: light-dark(oklch(0.777 0.017 118.2), oklch(0.148 0.005 128.5));
  --color-kbd04-acc: light-dark(#2f6e42, #7cc496);
  --color-kbd04-acc: light-dark(oklch(0.485 0.096 151.1), oklch(0.76 0.099 155.3));
  --font-kbd04-serif: 'Source Serif 4', Georgia, serif;
  --font-kbd04-sans: 'IBM Plex Sans', system-ui, sans-serif;
}
/* Root rule: the full-bleed contract, stated in CSS as well as utilities so the stage is sized before the browser build compiles. */

.kbd-04 {
  width: 100%;
  min-height: 100svh;
  position: relative;
}

Setup — do this once per project

Skip this if your project already runs Tailwind v4.

1Load Tailwind
<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.

2Add the stylesheetRequiredthe @theme block is what makes the custom utilities exist
@import "tailwindcss";
/* Theme state: follows the OS; the corner switch flips it for THIS demo only. */

@custom-variant kbd04-dark {
  @media (prefers-color-scheme: dark) {
    &:where(.kbd-04:not(:has(#kbd-04-theme:checked)), .kbd-04:not(:has(#kbd-04-theme:checked)) *) {
      @slot;
    }
  }

  @media (prefers-color-scheme: light) {
    &:where(.kbd-04:has(#kbd-04-theme:checked), .kbd-04:has(#kbd-04-theme:checked) *) {
      @slot;
    }
  }
}
/* Every colour is light-dark(day, night): the root's scheme-light / scheme-dark utility picks the side. */

@theme {
  --color-kbd04-bg: light-dark(#fbfbf9, #141513);
  --color-kbd04-bg: light-dark(oklch(0.988 0.003 106.4), oklch(0.194 0.004 128.7));
  --color-kbd04-card: light-dark(#ffffff, #1c1d1a);
  --color-kbd04-card: light-dark(oklch(1 0 0), oklch(0.229 0.006 121.9));
  --color-kbd04-ink: light-dark(#1f211d, #e9eae5);
  --color-kbd04-ink: light-dark(oklch(0.244 0.008 128.8), oklch(0.935 0.007 115.7));
  --color-kbd04-mut: light-dark(#585c53, #a3a79c);
  --color-kbd04-mut: light-dark(oklch(0.468 0.015 126.6), oklch(0.722 0.016 123.1));
  --color-kbd04-rule: light-dark(#e3e4dd, #2c2e29);
  --color-kbd04-rule: light-dark(oklch(0.916 0.009 113.2), oklch(0.297 0.009 124.8));
  --color-kbd04-cap: light-dark(#ecede6, #2a2c27);
  --color-kbd04-cap: light-dark(oklch(0.943 0.009 113.2), oklch(0.289 0.009 124.8));
  --color-kbd04-capink: light-dark(#2b2e28, #e4e6df);
  --color-kbd04-capink: light-dark(oklch(0.296 0.011 128.9), oklch(0.921 0.01 119.6));
  --color-kbd04-rim: light-dark(#bfc2b6, #4a4e44);
  --color-kbd04-rim: light-dark(oklch(0.808 0.017 118.2), oklch(0.417 0.017 124.9));
  --color-kbd04-edge: light-dark(#b5b8ac, #0a0b09);
  --color-kbd04-edge: light-dark(oklch(0.777 0.017 118.2), oklch(0.148 0.005 128.5));
  --color-kbd04-acc: light-dark(#2f6e42, #7cc496);
  --color-kbd04-acc: light-dark(oklch(0.485 0.096 151.1), oklch(0.76 0.099 155.3));
  --font-kbd04-serif: 'Source Serif 4', Georgia, serif;
  --font-kbd04-sans: 'IBM Plex Sans', system-ui, sans-serif;
}
/* Root rule: the full-bleed contract, stated in CSS as well as utilities so the stage is sized before the browser build compiles. */

.kbd-04 {
  width: 100%;
  min-height: 100svh;
  position: relative;
}
3Fonts used by this demooptional — skip if you have your own type stack
<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=Source+Serif+4:ital,opsz,wght@0,8..60,400..700;1,8..60,400..700&family=IBM+Plex+Sans:wght@400;500;600&display=swap">

What changed in the port

Which parts became utilities, which stayed CSS, and why.

  • The --raised modifier became a second utility string — the comparison is literally two class lists.
  • box-decoration-break: clone ships as the arbitrary property [box-decoration-break:clone] (v4 also offers box-decoration-clone).
  • UI upgrade: the flat chip gained an inset hairline ring so it holds a visible boundary on both themes — the CSS original's fill alone nearly vanished against the page.
  • UI upgrade: the comparison columns became cards with an accent eyebrow, and the second paragraph reads as an italic aside.
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
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: Flat Minimalist Tailwind Kbd Key for Body Text
Source: https://codefronts.com/snippets/tailwind-css-kbd-keys/flat-minimalist-tailwind-kbd-key-body-text/

For prose that mentions a dozen keys, the raised cap gets noisy. This flat treatment is a tinted chip — no border, no edge — with a faint inset ring-kbd04-rim/50 so it stays perceivable on any surface. Side-by-side cards compare it to the raised cap so the reader can see which to reach for.
## HTML
```html
<section class="kbd-04 relative w-full min-h-svh scheme-light kbd04-dark:scheme-dark bg-kbd04-bg text-kbd04-ink" aria-label="Flat minimalist kbd key demo">
  <div class="grid min-h-svh place-items-center px-5 pt-20 pb-12">
    <article class="w-full min-w-0 max-w-[36rem]">
      <h2 class="mb-4 font-kbd04-serif text-[clamp(26px,5vw,34px)] font-semibold leading-tight tracking-[-0.01em]">Selection and navigation</h2>
      <p class="mb-4 font-kbd04-serif text-[clamp(16px,3.4vw,18px)] leading-[1.75] text-pretty">Hold <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Shift</kbd> and use the arrow keys to grow the selection by one character, or add <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Alt</kbd> to grow it by one word. <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Home</kbd> and <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">End</kbd> jump to the ends of the visual line; add <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> to jump to the ends of the document instead. Numbered tabs respond to <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> plus <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">1</kbd> through <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">9</kbd>, and <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> plus <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">0</kbd> returns to the last one you looked at.</p>
      <p class="mb-7 font-kbd04-serif text-[clamp(16px,3.4vw,18px)] italic leading-[1.75] text-kbd04-mut">Twelve keys in two paragraphs, and the page still reads as prose. That is the argument for the flat treatment.</p>
      <div class="grid gap-3 sm:grid-cols-2">
        <div class="min-w-0 rounded-xl border border-kbd04-rule bg-kbd04-card p-4"><p class="mb-2 font-kbd04-sans text-[10.5px] font-semibold uppercase tracking-[0.16em] text-kbd04-acc">Flat · this demo</p><p class="font-kbd04-serif text-[17px]">Press <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">Ctrl</kbd> <kbd class="whitespace-nowrap rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em] font-kbd04-sans text-[0.84em] font-medium text-kbd04-capink ring-1 ring-kbd04-rim/50 ring-inset [box-decoration-break:clone]">K</kbd> to search.</p><p class="mt-2 font-kbd04-sans text-[13px] leading-snug text-kbd04-mut">Reference prose, changelogs, dense help pages.</p></div>
        <div class="min-w-0 rounded-xl border border-kbd04-rule bg-kbd04-card p-4"><p class="mb-2 font-kbd04-sans text-[10.5px] font-semibold uppercase tracking-[0.16em] text-kbd04-acc">Raised · demo 01</p><p class="font-kbd04-serif text-[17px]">Press <kbd class="inline-block whitespace-nowrap rounded-[0.3em] border border-kbd04-rim bg-kbd04-card px-[0.5em] py-[0.24em] align-[0.06em] font-kbd04-sans text-[0.8em] font-semibold leading-none text-kbd04-capink shadow-[0_1px_0_var(--color-kbd04-edge)]">Ctrl</kbd> <kbd class="inline-block whitespace-nowrap rounded-[0.3em] border border-kbd04-rim bg-kbd04-card px-[0.5em] py-[0.24em] align-[0.06em] font-kbd04-sans text-[0.8em] font-semibold leading-none text-kbd04-capink shadow-[0_1px_0_var(--color-kbd04-edge)]">K</kbd> to search.</p><p class="mt-2 font-kbd04-sans text-[13px] leading-snug text-kbd04-mut">Tips, callouts, first-run hints — one shortcut at a time.</p></div>
      </div>
    </article>
  </div>
  <div class="absolute top-3.5 right-4 z-10">
    <input id="kbd-04-theme" type="checkbox" class="peer sr-only">
    <label for="kbd-04-theme" class="inline-flex min-h-11 cursor-pointer select-none items-center gap-2.5 rounded-full border border-current/55 px-4 font-sans text-[11px] font-bold uppercase leading-none tracking-[0.16em] text-kbd04-ink transition-colors hover:border-current peer-focus-visible:outline-3 peer-focus-visible:outline-offset-2 peer-focus-visible:outline-kbd04-acc">
      <span aria-hidden="true" class="size-3 flex-none rounded-full bg-current transition-[background-color,box-shadow] duration-300 kbd04-dark:bg-transparent kbd04-dark:shadow-[inset_-4px_-2px_0_0_currentColor] motion-reduce:transition-none"></span>
      <span class="kbd04-dark:hidden">Light</span><span class="hidden kbd04-dark:inline">Dark</span><span class="sr-only"> theme</span>
    </label>
  </div>
</section>
```
## CSS
```css
@import "tailwindcss";
/* Theme state: follows the OS; the corner switch flips it for THIS demo only. */

@custom-variant kbd04-dark {
  @media (prefers-color-scheme: dark) {
    &:where(.kbd-04:not(:has(#kbd-04-theme:checked)), .kbd-04:not(:has(#kbd-04-theme:checked)) *) {
      @slot;
    }
  }

  @media (prefers-color-scheme: light) {
    &:where(.kbd-04:has(#kbd-04-theme:checked), .kbd-04:has(#kbd-04-theme:checked) *) {
      @slot;
    }
  }
}
/* Every colour is light-dark(day, night): the root's scheme-light / scheme-dark utility picks the side. */

@theme {
  --color-kbd04-bg: light-dark(#fbfbf9, #141513);
  --color-kbd04-bg: light-dark(oklch(0.988 0.003 106.4), oklch(0.194 0.004 128.7));
  --color-kbd04-card: light-dark(#ffffff, #1c1d1a);
  --color-kbd04-card: light-dark(oklch(1 0 0), oklch(0.229 0.006 121.9));
  --color-kbd04-ink: light-dark(#1f211d, #e9eae5);
  --color-kbd04-ink: light-dark(oklch(0.244 0.008 128.8), oklch(0.935 0.007 115.7));
  --color-kbd04-mut: light-dark(#585c53, #a3a79c);
  --color-kbd04-mut: light-dark(oklch(0.468 0.015 126.6), oklch(0.722 0.016 123.1));
  --color-kbd04-rule: light-dark(#e3e4dd, #2c2e29);
  --color-kbd04-rule: light-dark(oklch(0.916 0.009 113.2), oklch(0.297 0.009 124.8));
  --color-kbd04-cap: light-dark(#ecede6, #2a2c27);
  --color-kbd04-cap: light-dark(oklch(0.943 0.009 113.2), oklch(0.289 0.009 124.8));
  --color-kbd04-capink: light-dark(#2b2e28, #e4e6df);
  --color-kbd04-capink: light-dark(oklch(0.296 0.011 128.9), oklch(0.921 0.01 119.6));
  --color-kbd04-rim: light-dark(#bfc2b6, #4a4e44);
  --color-kbd04-rim: light-dark(oklch(0.808 0.017 118.2), oklch(0.417 0.017 124.9));
  --color-kbd04-edge: light-dark(#b5b8ac, #0a0b09);
  --color-kbd04-edge: light-dark(oklch(0.777 0.017 118.2), oklch(0.148 0.005 128.5));
  --color-kbd04-acc: light-dark(#2f6e42, #7cc496);
  --color-kbd04-acc: light-dark(oklch(0.485 0.096 151.1), oklch(0.76 0.099 155.3));
  --font-kbd04-serif: 'Source Serif 4', Georgia, serif;
  --font-kbd04-sans: 'IBM Plex Sans', system-ui, sans-serif;
}
/* Root rule: the full-bleed contract, stated in CSS as well as utilities so the stage is sized before the browser build compiles. */

.kbd-04 {
  width: 100%;
  min-height: 100svh;
  position: relative;
}
```

How this works

Flat is about density. Twelve raised caps in two paragraphs make the text look like a keyboard. A flat chip keeps the paragraph reading as prose:

<kbd class="rounded-[0.28em] bg-kbd04-cap px-[0.38em] py-[0.06em]
  text-[0.84em] ring-1 ring-inset ring-kbd04-rim/50">Shift</kbd>

The ring is the accessibility fix. A fill alone may fall under 3:1 against the page; the inset ring guarantees a visible edge without adding layout size.

Make it yours

  • Even quieter: drop the ring and use bg-kbd04-cap/70.
  • Monospace labels for developer docs: swap to font-mono.
  • Accent keys: bg-kbd04-acc/12 text-kbd04-acc for the one shortcut that matters.

Gotchas — read before shipping

  • Inline elements ignore vertical padding for layout — that is the point here, but do not rely on it for hit targets.
  • ring-* on inline elements paints per line fragment; with box-decoration-break:clone each fragment gets its own ring.
  • Wrapped keys look odd; whitespace-nowrap prevents “Page Down” splitting.

Browser support

ChromeSafariFirefoxEdge
123+17.5+128+123+

Tailwind v4's own sheet needs Chrome 111 / Safari 16.4 / Firefox 128 (cascade layers, @property, color-mix()); the light-dark() theme tokens raise the floor to Chrome 123 / Safari 17.5.

Techniques used in this demo

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