Shopify UI Skills

Opinionated constraints for building Shopify-style interfaces with AI agents.

When to Apply

Reference these guidelines when:

• Building light-mode interfaces

• Creating Shopify-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 )

• SHOULD limit color palette to 10 distinct colors

• 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

#04090B rgb(4,9,11) Cards, modals, raised surfaces

text-primary

#858A8E rgb(133,138,142) Headings, body text

text-secondary

#C9CCCD rgb(201,204,205) Secondary, muted text

text-tertiary

#B9BCBF rgb(185,188,191) Additional text

border-default

#DFE1E2 rgb(223,225,226) Subtle borders, dividers

Typography

• MUST use Inter as primary font family

• SHOULD use single font family for consistency

• MUST use 88px / extra_bold for primary headings

• MUST use 39px / 500 for body text

• SHOULD reduce font weights (currently 5 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 88px extra_bold #D5D6D7 1

text-63px

Inter 63px semi_bold #C9CCCD 1

body

Inter 39px 500 #858A8E 1

text-29px

Inter 29px semi_bold #DBDCDE 1

text-27px

Inter 27px 400 #B7BABD 1

text-17px

Inter 17px 400 #B9BCBF 1

text-16px

Inter 16px 400 #9FA2A6 1

text-15px

Inter 15px 300 #A5A8AC 1

text-15px

Inter 15px 400 #A4A7AA 1

caption

Inter 13px 400 #3E3E3E 1

Typography Reference

Font Families:

• Inter (used 14x)

Font Sizes: 12px, 13px, 15px, 16px, 17px, 27px, 29px, 39px, 63px, 88px

Spacing

• MUST use 4px grid for spacing

• SHOULD use spacing from scale: 4px, 5px, 6px, 7px, 65px

• SHOULD use 5px 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: 19px, 26px, 28px

• SHOULD use 26px+ radius for pill-shaped elements

• MUST use 2px border width consistently

• SHOULD use 19px 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: 19px, 26px, 28px

Layout

• MUST design for 1920px base viewport width

• SHOULD use consistent element widths: 11px

• 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: 1855px, height: 1080px

• Main Content: width: 1920px, height: 747px

• Main Content: width: 1920px, height: 745px

Components

Buttons

Variant Background Text Border Height Radius

Ghost transparent #B9BCBF none

Interactive States

Focus

• MUST use 2px outline with accent color (#5E6AD2 )

• MUST use 2px outline-offset

• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%

• Buttons (secondary): use #04090B background

• List items: use #04090B 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