20 Tailwind CSS Kbd Keys
05 / 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

Responsive Tailwind Kbd Sizing with Em Units

One class list, three contexts: a 68px display headline, body copy and a caption — and the cap is correct in all of them because padding, radius, border width and even the edge shadow are authored in em. Tailwind's spacing scale is rem-based, so this is where arbitrary values earn their keep.

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The code

<section class="kbd-05 relative w-full min-h-svh scheme-light kbd05-dark:scheme-dark bg-kbd05-bg bg-[radial-gradient(90%_70%_at_80%_0%,var(--color-kbd05-glow),transparent_70%)] text-kbd05-ink" aria-label="Fluid em-based kbd sizing demo">
  <div class="grid min-h-svh place-items-center px-5 pt-20 pb-12">
    <div class="w-full min-w-0 max-w-[40rem]">
      <p class="mb-4 font-kbd05-sans text-[10.5px] font-semibold uppercase tracking-[0.24em] text-kbd05-acc">Same markup · three contexts</p>
      <h2 class="mb-6 font-kbd05-serif text-[clamp(36px,7.5vw,68px)] leading-[1.05] tracking-[-0.01em] text-balance">Press <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Ctrl</kbd> <span class="font-kbd05-sans text-[0.7em] text-kbd05-mut">+</span> <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">P</kbd> to <em>jump</em></h2>
      <p class="mb-4 font-kbd05-sans text-[clamp(15px,3.2vw,17px)] leading-[1.7] text-pretty">In body copy the same cap settles down to something you can read past: <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Ctrl</kbd> <span class="font-kbd05-sans text-[0.7em] text-kbd05-mut">+</span> <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">P</kbd> opens the file switcher, and <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Esc</kbd> closes it again.</p>
      <p class="font-kbd05-serif text-[15px] italic text-kbd05-mut">Even in a caption it stays centred and legible — <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Ctrl</kbd> <span class="font-kbd05-sans text-[0.7em] text-kbd05-mut">+</span> <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">P</kbd> · figure 2</p>
      <ul class="mt-8 grid grid-cols-2 gap-2 border-t border-kbd05-rule pt-6 sm:grid-cols-4">
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">padding</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.3em 0.55em</span></li>
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">radius</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.32em</span></li>
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">border</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.07em</span></li>
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">label</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.85em</span></li>
      </ul>
    </div>
  </div>
  <div class="absolute top-3.5 right-4 z-10">
    <input id="kbd-05-theme" type="checkbox" class="peer sr-only">
    <label for="kbd-05-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-kbd05-ink transition-colors hover:border-current peer-focus-visible:outline-3 peer-focus-visible:outline-offset-2 peer-focus-visible:outline-kbd05-acc">
      <span aria-hidden="true" class="size-3 flex-none rounded-full bg-current transition-[background-color,box-shadow] duration-300 kbd05-dark:bg-transparent kbd05-dark:shadow-[inset_-4px_-2px_0_0_currentColor] motion-reduce:transition-none"></span>
      <span class="kbd05-dark:hidden">Light</span><span class="hidden kbd05-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 kbd05-dark {
  @media (prefers-color-scheme: dark) {
    &:where(.kbd-05:not(:has(#kbd-05-theme:checked)), .kbd-05:not(:has(#kbd-05-theme:checked)) *) {
      @slot;
    }
  }

  @media (prefers-color-scheme: light) {
    &:where(.kbd-05:has(#kbd-05-theme:checked), .kbd-05:has(#kbd-05-theme:checked) *) {
      @slot;
    }
  }
}
/* Every colour is light-dark(day, night): the root's scheme-light / scheme-dark utility picks the side. */

@theme {
  --color-kbd05-bg: light-dark(#f5f2fb, #13111a);
  --color-kbd05-bg: light-dark(oklch(0.966 0.012 301.3), oklch(0.184 0.018 294.7));
  --color-kbd05-glow: light-dark(#e8e0fb, #241c3a);
  --color-kbd05-glow: light-dark(oklch(0.921 0.037 299.2), oklch(0.252 0.056 294.3));
  --color-kbd05-ink: light-dark(#1e1830, #ece8f6);
  --color-kbd05-ink: light-dark(oklch(0.229 0.046 294), oklch(0.938 0.019 299.1));
  --color-kbd05-mut: light-dark(#59506f, #a69ebc);
  --color-kbd05-mut: light-dark(oklch(0.452 0.051 297.6), oklch(0.716 0.044 297.5));
  --color-kbd05-rule: light-dark(#e0dbee, #2a2537);
  --color-kbd05-rule: light-dark(oklch(0.901 0.026 297.9), oklch(0.278 0.033 296.9));
  --color-kbd05-chip: light-dark(#ece7f8, #1d1a27);
  --color-kbd05-chip: light-dark(oklch(0.937 0.023 299.4), oklch(0.227 0.025 294.9));
  --color-kbd05-cap: light-dark(#ffffff, #26213a);
  --color-kbd05-cap: light-dark(oklch(1 0 0), oklch(0.266 0.046 292.1));
  --color-kbd05-rim: light-dark(#c9c0df, #4a4262);
  --color-kbd05-rim: light-dark(oklch(0.825 0.044 298.7), oklch(0.401 0.054 295.3));
  --color-kbd05-edge: light-dark(#ada2c8, #07060a);
  --color-kbd05-edge: light-dark(oklch(0.734 0.055 298.3), oklch(0.126 0.01 297.7));
  --color-kbd05-capink: light-dark(#2a2240, #ebe6f7);
  --color-kbd05-capink: light-dark(oklch(0.276 0.055 294.8), oklch(0.934 0.023 299.4));
  --color-kbd05-acc: light-dark(#6236b8, #b49af2);
  --color-kbd05-acc: light-dark(oklch(0.465 0.192 292.9), oklch(0.743 0.127 296.8));
  --font-kbd05-serif: 'Instrument Serif', Georgia, serif;
  --font-kbd05-sans: 'Geist', system-ui, sans-serif;
  --font-kbd05-mono: 'Geist Mono', ui-monospace, monospace;
}
/* Root rule: the full-bleed contract, stated in CSS as well as utilities so the stage is sized before the browser build compiles. */

.kbd-05 {
  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 kbd05-dark {
  @media (prefers-color-scheme: dark) {
    &:where(.kbd-05:not(:has(#kbd-05-theme:checked)), .kbd-05:not(:has(#kbd-05-theme:checked)) *) {
      @slot;
    }
  }

  @media (prefers-color-scheme: light) {
    &:where(.kbd-05:has(#kbd-05-theme:checked), .kbd-05:has(#kbd-05-theme:checked) *) {
      @slot;
    }
  }
}
/* Every colour is light-dark(day, night): the root's scheme-light / scheme-dark utility picks the side. */

@theme {
  --color-kbd05-bg: light-dark(#f5f2fb, #13111a);
  --color-kbd05-bg: light-dark(oklch(0.966 0.012 301.3), oklch(0.184 0.018 294.7));
  --color-kbd05-glow: light-dark(#e8e0fb, #241c3a);
  --color-kbd05-glow: light-dark(oklch(0.921 0.037 299.2), oklch(0.252 0.056 294.3));
  --color-kbd05-ink: light-dark(#1e1830, #ece8f6);
  --color-kbd05-ink: light-dark(oklch(0.229 0.046 294), oklch(0.938 0.019 299.1));
  --color-kbd05-mut: light-dark(#59506f, #a69ebc);
  --color-kbd05-mut: light-dark(oklch(0.452 0.051 297.6), oklch(0.716 0.044 297.5));
  --color-kbd05-rule: light-dark(#e0dbee, #2a2537);
  --color-kbd05-rule: light-dark(oklch(0.901 0.026 297.9), oklch(0.278 0.033 296.9));
  --color-kbd05-chip: light-dark(#ece7f8, #1d1a27);
  --color-kbd05-chip: light-dark(oklch(0.937 0.023 299.4), oklch(0.227 0.025 294.9));
  --color-kbd05-cap: light-dark(#ffffff, #26213a);
  --color-kbd05-cap: light-dark(oklch(1 0 0), oklch(0.266 0.046 292.1));
  --color-kbd05-rim: light-dark(#c9c0df, #4a4262);
  --color-kbd05-rim: light-dark(oklch(0.825 0.044 298.7), oklch(0.401 0.054 295.3));
  --color-kbd05-edge: light-dark(#ada2c8, #07060a);
  --color-kbd05-edge: light-dark(oklch(0.734 0.055 298.3), oklch(0.126 0.01 297.7));
  --color-kbd05-capink: light-dark(#2a2240, #ebe6f7);
  --color-kbd05-capink: light-dark(oklch(0.276 0.055 294.8), oklch(0.934 0.023 299.4));
  --color-kbd05-acc: light-dark(#6236b8, #b49af2);
  --color-kbd05-acc: light-dark(oklch(0.465 0.192 292.9), oklch(0.743 0.127 296.8));
  --font-kbd05-serif: 'Instrument Serif', Georgia, serif;
  --font-kbd05-sans: 'Geist', system-ui, sans-serif;
  --font-kbd05-mono: 'Geist Mono', ui-monospace, monospace;
}
/* Root rule: the full-bleed contract, stated in CSS as well as utilities so the stage is sized before the browser build compiles. */

.kbd-05 {
  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=Instrument+Serif:ital@0;1&family=Geist:wght@400..700&family=Geist+Mono:wght@400;500&display=swap">

What changed in the port

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

  • The CSS original's custom properties became literal arbitrary values — in utilities the class list is the token.
  • @media (max-width) metric reflow became grid-cols-2 sm:grid-cols-4.
  • UI upgrade: the edge shadow is now em-based too (it was a fixed 1px that disappeared at display size), and caps inside italic copy stay upright with not-italic.
  • UI upgrade: an Instrument Serif display headline makes the scaling dramatic, and the metrics became labelled tiles.
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: Responsive Tailwind Kbd Sizing with Em Units
Source: https://codefronts.com/snippets/tailwind-css-kbd-keys/responsive-tailwind-kbd-sizing-em-units/

One class list, three contexts: a 68px display headline, body copy and a caption — and the cap is correct in all of them because padding, radius, border width and even the edge shadow are authored in em. Tailwind's spacing scale is rem-based, so this is where arbitrary values earn their keep.
## HTML
```html
<section class="kbd-05 relative w-full min-h-svh scheme-light kbd05-dark:scheme-dark bg-kbd05-bg bg-[radial-gradient(90%_70%_at_80%_0%,var(--color-kbd05-glow),transparent_70%)] text-kbd05-ink" aria-label="Fluid em-based kbd sizing demo">
  <div class="grid min-h-svh place-items-center px-5 pt-20 pb-12">
    <div class="w-full min-w-0 max-w-[40rem]">
      <p class="mb-4 font-kbd05-sans text-[10.5px] font-semibold uppercase tracking-[0.24em] text-kbd05-acc">Same markup · three contexts</p>
      <h2 class="mb-6 font-kbd05-serif text-[clamp(36px,7.5vw,68px)] leading-[1.05] tracking-[-0.01em] text-balance">Press <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Ctrl</kbd> <span class="font-kbd05-sans text-[0.7em] text-kbd05-mut">+</span> <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">P</kbd> to <em>jump</em></h2>
      <p class="mb-4 font-kbd05-sans text-[clamp(15px,3.2vw,17px)] leading-[1.7] text-pretty">In body copy the same cap settles down to something you can read past: <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Ctrl</kbd> <span class="font-kbd05-sans text-[0.7em] text-kbd05-mut">+</span> <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">P</kbd> opens the file switcher, and <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Esc</kbd> closes it again.</p>
      <p class="font-kbd05-serif text-[15px] italic text-kbd05-mut">Even in a caption it stays centred and legible — <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">Ctrl</kbd> <span class="font-kbd05-sans text-[0.7em] text-kbd05-mut">+</span> <kbd class="inline-block whitespace-nowrap rounded-[0.32em] border-[0.07em] border-kbd05-rim bg-kbd05-cap px-[0.55em] py-[0.3em] align-[0.08em] font-kbd05-sans text-[0.85em] font-semibold not-italic leading-none text-kbd05-capink shadow-[0_0.08em_0_var(--color-kbd05-edge)]">P</kbd> · figure 2</p>
      <ul class="mt-8 grid grid-cols-2 gap-2 border-t border-kbd05-rule pt-6 sm:grid-cols-4">
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">padding</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.3em 0.55em</span></li>
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">radius</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.32em</span></li>
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">border</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.07em</span></li>
        <li class="grid gap-1 rounded-lg bg-kbd05-chip px-3 py-2.5"><span class="font-kbd05-sans text-[10px] font-semibold uppercase tracking-[0.16em] text-kbd05-mut">label</span><span class="font-kbd05-mono text-[13px] text-kbd05-ink">0.85em</span></li>
      </ul>
    </div>
  </div>
  <div class="absolute top-3.5 right-4 z-10">
    <input id="kbd-05-theme" type="checkbox" class="peer sr-only">
    <label for="kbd-05-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-kbd05-ink transition-colors hover:border-current peer-focus-visible:outline-3 peer-focus-visible:outline-offset-2 peer-focus-visible:outline-kbd05-acc">
      <span aria-hidden="true" class="size-3 flex-none rounded-full bg-current transition-[background-color,box-shadow] duration-300 kbd05-dark:bg-transparent kbd05-dark:shadow-[inset_-4px_-2px_0_0_currentColor] motion-reduce:transition-none"></span>
      <span class="kbd05-dark:hidden">Light</span><span class="hidden kbd05-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 kbd05-dark {
  @media (prefers-color-scheme: dark) {
    &:where(.kbd-05:not(:has(#kbd-05-theme:checked)), .kbd-05:not(:has(#kbd-05-theme:checked)) *) {
      @slot;
    }
  }

  @media (prefers-color-scheme: light) {
    &:where(.kbd-05:has(#kbd-05-theme:checked), .kbd-05:has(#kbd-05-theme:checked) *) {
      @slot;
    }
  }
}
/* Every colour is light-dark(day, night): the root's scheme-light / scheme-dark utility picks the side. */

@theme {
  --color-kbd05-bg: light-dark(#f5f2fb, #13111a);
  --color-kbd05-bg: light-dark(oklch(0.966 0.012 301.3), oklch(0.184 0.018 294.7));
  --color-kbd05-glow: light-dark(#e8e0fb, #241c3a);
  --color-kbd05-glow: light-dark(oklch(0.921 0.037 299.2), oklch(0.252 0.056 294.3));
  --color-kbd05-ink: light-dark(#1e1830, #ece8f6);
  --color-kbd05-ink: light-dark(oklch(0.229 0.046 294), oklch(0.938 0.019 299.1));
  --color-kbd05-mut: light-dark(#59506f, #a69ebc);
  --color-kbd05-mut: light-dark(oklch(0.452 0.051 297.6), oklch(0.716 0.044 297.5));
  --color-kbd05-rule: light-dark(#e0dbee, #2a2537);
  --color-kbd05-rule: light-dark(oklch(0.901 0.026 297.9), oklch(0.278 0.033 296.9));
  --color-kbd05-chip: light-dark(#ece7f8, #1d1a27);
  --color-kbd05-chip: light-dark(oklch(0.937 0.023 299.4), oklch(0.227 0.025 294.9));
  --color-kbd05-cap: light-dark(#ffffff, #26213a);
  --color-kbd05-cap: light-dark(oklch(1 0 0), oklch(0.266 0.046 292.1));
  --color-kbd05-rim: light-dark(#c9c0df, #4a4262);
  --color-kbd05-rim: light-dark(oklch(0.825 0.044 298.7), oklch(0.401 0.054 295.3));
  --color-kbd05-edge: light-dark(#ada2c8, #07060a);
  --color-kbd05-edge: light-dark(oklch(0.734 0.055 298.3), oklch(0.126 0.01 297.7));
  --color-kbd05-capink: light-dark(#2a2240, #ebe6f7);
  --color-kbd05-capink: light-dark(oklch(0.276 0.055 294.8), oklch(0.934 0.023 299.4));
  --color-kbd05-acc: light-dark(#6236b8, #b49af2);
  --color-kbd05-acc: light-dark(oklch(0.465 0.192 292.9), oklch(0.743 0.127 296.8));
  --font-kbd05-serif: 'Instrument Serif', Georgia, serif;
  --font-kbd05-sans: 'Geist', system-ui, sans-serif;
  --font-kbd05-mono: 'Geist Mono', ui-monospace, monospace;
}
/* Root rule: the full-bleed contract, stated in CSS as well as utilities so the stage is sized before the browser build compiles. */

.kbd-05 {
  width: 100%;
  min-height: 100svh;
  position: relative;
}
```

How this works

Rem utilities do not scale with context. px-2 is 0.5rem everywhere, so a cap that looks right in body copy looks starved in a headline. Every dimension is an em arbitrary value instead:

rounded-[0.32em] border-[0.07em] px-[0.55em] py-[0.3em]
text-[0.85em] shadow-[0_0.08em_0_var(--color-kbd05-edge)]

The metrics tiles below the specimen list the four ratios, so a designer can lift them into any system.

Make it yours

  • Extract a component: in v4, @utility kbd-em { … } turns the class list into one utility if you repeat it often.
  • Heavier display caps: raise border-[0.07em] to 0.1em.
  • Clamp the label in captions: text-[max(0.85em,11px)].

Gotchas — read before shipping

  • Em on border-width rounds to device pixels; below ~14px text it renders as 1px — expected.
  • Nested em compounds: a cap inside a cap scales twice.
  • not-italic matters — inherited italic slants the label and breaks the key metaphor.

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

Utilitiesfirst-class utility or variant

box-shadowtw ↗

Arbitraryneeds bracket syntax

clamp()tw ↗

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