Superhuman UI Skills Opinionated constraints for building Superhuman-style interfaces with AI agents. When to Apply Reference these guidelines when: Building light-mode interfaces Creating Superhuman-inspired design systems Implementing UIs with Inter font and 4px grid Colors SHOULD use light backgrounds for primary surfaces MUST use

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as page background ( surface-base ) MUST use

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for primary actions and focus states ( accent ) SHOULD reduce color palette (currently 24 colors detected) MUST maintain text contrast ratio of at least 4.5:1 for accessibility Semantic Tokens Token HEX RGB Usage surface-base

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rgb(201,183,253) Page background surface-raised

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rgb(75,81,150) Cards, modals, raised surfaces surface-overlay

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rgb(53,16,39) Overlays, tooltips, dropdowns text-primary

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rgb(184,177,215) Headings, body text text-secondary

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rgb(189,198,223) Secondary, muted text text-tertiary

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rgb(179,152,169) Additional text border-default

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rgb(77,84,152) Subtle borders, dividers accent

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rgb(188,186,252) Primary actions, links, focus Typography MUST use Inter as primary font family SHOULD use single font family for consistency MUST use 56px / extra_bold for primary headings MUST use 25px / 400 for body text SHOULD reduce font weights (currently 4 detected) MUST use text-balance for headings and text-pretty for body text SHOULD use tabular-nums for numeric data NEVER modify letter-spacing unless explicitly requested Text Styles Style Font Size Weight Color Count heading-1 Inter 56px extra_bold

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1 body Inter 25px 400

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1 text-17px Inter 17px 400

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1 text-16px Inter 16px 400

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1 text-15px Inter 15px 400

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1 text-15px Inter 15px 400

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1 text-14px Inter 14px 400

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1 text-14px Inter 14px 400

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1 text-14px Inter 14px 400

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1 text-14px Inter 14px 400

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1

Typography Reference

Font Families:

Inter

(used 44x)

Font Sizes:

10px, 11px, 12px, 13px, 14px, 15px, 16px, 17px, 25px, 56px

Spacing

MUST use 4px grid for spacing

SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 6px, 7px, 8px

SHOULD use 3px as default gap between elements

NEVER use arbitrary spacing values (use design scale)

SHOULD maintain consistent padding within containers

Borders

MUST use border-radius from scale: 3px, 4px, 7px, 8px, 10px, 15px, 21px, 22px, 23px

SHOULD use 21px+ radius for pill-shaped elements

SHOULD limit border widths to: 1px, 2px, 3px, 5px

SHOULD use 10px as default border-radius

NEVER use arbitrary border-radius values (use design scale)

SHOULD use subtle borders (1px) for element separation

Border Radius Reference

Scale:

3px, 4px, 7px, 8px, 10px, 15px, 21px, 22px, 23px

Layout

MUST design for 1920px base viewport width

SHOULD use consistent element widths: 11px, 10px, 14px, 44px, 220px

SHOULD maintain text-heavy layout with clear hierarchy

NEVER use

h-screen

, use

h-dvh

for full viewport height

MUST respect

safe-area-inset

for fixed elements

SHOULD use

size-*

for square elements instead of

w-*

+

h-*

Detected Layout Patterns

Main Content

width: 1920px, height: 1006px

Main Content

width: 1920px, height: 1047px Components Buttons Variant Background Text Border Height Radius Ghost transparent

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none

- Interactive States Focus MUST use 2px outline with accent color (

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) MUST use 2px outline-offset NEVER remove focus indicators Hover Buttons (primary): lighten background by 10% Buttons (secondary): use

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background List items: use

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background Disabled MUST use opacity: 0.5 MUST use cursor: not-allowed Interaction MUST use an AlertDialog for destructive or irreversible actions SHOULD use structural skeletons for loading states MUST show errors next to where the action happens NEVER block paste in input or textarea elements MUST add an aria-label to icon-only buttons Animation NEVER add animation unless it is explicitly requested MUST animate only compositor props ( transform , opacity ) NEVER animate layout properties ( width , height , top , left , margin , padding ) SHOULD use ease-out on entrance animations NEVER exceed 200ms for interaction feedback SHOULD respect prefers-reduced-motion Performance NEVER animate large blur() or backdrop-filter surfaces NEVER apply will-change outside an active animation NEVER use useEffect for anything that can be expressed as render logic