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 #C9B7FD as page background (surface-base )

• MUST use #BCBAFC 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

#C9B7FD rgb(201,183,253) Page background

surface-raised

#4B5196 rgb(75,81,150) Cards, modals, raised surfaces

surface-overlay

#351027 rgb(53,16,39) Overlays, tooltips, dropdowns

text-primary

#B8B1D7 rgb(184,177,215) Headings, body text

text-secondary

#BDC6DF rgb(189,198,223) Secondary, muted text

text-tertiary

#B398A9 rgb(179,152,169) Additional text

border-default

#4D5498 rgb(77,84,152) Subtle borders, dividers

accent

#BCBAFC 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 #DDE3EC 1

body

Inter 25px 400 #CEDCEE 1

text-17px

Inter 17px 400 #7F5D77 1

text-16px

Inter 16px 400 #B1AFB9 1

text-15px

Inter 15px 400 #ABB1D6 1

text-15px

Inter 15px 400 #B49EBA 1

text-14px

Inter 14px 400 #B1B5D9 1

text-14px

Inter 14px 400 #AFB5DB 1

text-14px

Inter 14px 400 #A592B5 1

text-14px

Inter 14px 400 #B9ACD4 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 #B8B1D7 none

Interactive States

Focus

• MUST use 2px outline with accent color (#BCBAFC )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #4B5196 background

• List items: use #4B5196 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