Copy Ai UI Skills

Opinionated constraints for building Copy Ai-style interfaces with AI agents.

When to Apply

Reference these guidelines when:

• Building light-mode interfaces

• Creating Copy Ai-inspired design systems

• Implementing UIs with Inter font and 4px grid

Colors

• SHOULD use light backgrounds for primary surfaces

• MUST use #FEFEFE as page background (surface-base )

• MUST use #5227BD for primary actions and focus states (accent )

• SHOULD reduce color palette (currently 18 colors detected)

• MUST maintain text contrast ratio of at least 4.5:1 for accessibility

Semantic Tokens

Token HEX RGB Usage

surface-base

#FEFEFE rgb(254,254,254) Page background

surface-raised

#111111 rgb(17,17,17) Cards, modals, raised surfaces

surface-overlay

#541ED7 rgb(84,30,215) Overlays, tooltips, dropdowns

text-primary

#525252 rgb(82,82,82) Headings, body text

text-secondary

#737C83 rgb(115,124,131) Secondary, muted text

text-tertiary

#5F6A72 rgb(95,106,114) Additional text

border-default

#F9FCFC rgb(249,252,252) Subtle borders, dividers

accent

#5227BD rgb(82,39,189) Primary actions, links, focus

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 66px / 700 for primary headings

• MUST use 38px / 700 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 66px 700 #1D1E1E 1

body

Inter 38px 700 #1D2021 1

text-30px

Inter 30px 400 #7F868A 1

text-30px

Inter 30px 700 #2E2E2E 1

text-25px

Inter 25px semi_bold #5B686F 1

text-24px

Inter 24px 500 #767E82 1

text-24px

Inter 24px 500 #636E73 1

text-24px

Inter 24px semi_bold #5B686F 1

text-20px

Inter 20px semi_bold #5F6A72 1

text-20px

Inter 20px semi_bold #5B676F 1

Typography Reference

Font Families:

• Inter (used 33x)

Font Sizes: 9px, 12px, 13px, 15px, 16px, 17px, 18px, 19px, 20px, 24px, 25px, 30px, 38px, 66px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 8px, 9px, 14px

• SHOULD use 4px 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: 33px

• SHOULD use 33px+ radius for pill-shaped elements

• SHOULD limit border widths to: 1px, 2px

• SHOULD use 33px 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: 33px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 10px, 113px, 8px, 9px, 1400px

• 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: 1039px

• Main Content: width: 1399px, height: 696px

• Main Content: width: 1410px, height: 659px

• Header: height: 48px

Components

Buttons

Variant Background Text Border Height Radius

Ghost transparent #BEBEBE none

Interactive States

Focus

• MUST use 2px outline with accent color (#5227BD )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #111111 background

• List items: use #111111 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