n26-ui-skills

name	n26-ui-skills
description	N26's UI design system. Use when building interfaces inspired by N26's aesthetic - dark mode, Inter font, 4px grid.
license	MIT
metadata	{"author":"design-skills","version":"1.0.0","source":"https://n26.com"}

N26 UI Skills

Opinionated constraints for building N26-style interfaces with AI agents.

When to Apply

Reference these guidelines when:

• Building dark-mode interfaces
• Creating N26-inspired design systems
• Implementing UIs with Inter font and 4px grid

Colors

• MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 0
• MUST use #000000 as page background (surface-base)
• MUST use #116F64 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	#000000	rgb(0,0,0)	Page background
surface-raised	#929493	rgb(146,148,147)	Cards, modals, raised surfaces
surface-overlay	#E0E0E0	rgb(224,224,224)	Overlays, tooltips, dropdowns
text-primary	#555555	rgb(85,85,85)	Headings, body text
text-secondary	#436960	rgb(67,105,96)	Secondary, muted text
text-tertiary	#588378	rgb(88,131,120)	Additional text
border-default	#D3D3D3	rgb(211,211,211)	Subtle borders, dividers
accent	#116F64	rgb(17,111,100)	Primary actions, links, focus

Typography

• MUST use Inter as primary font family
• SHOULD use single font family for consistency
• MUST use 46px / extra_bold for primary headings
• MUST use 27px / 500 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	46px	extra_bold	#D9DBD7	1
text-32px	Inter	32px	500	#393939	1
body	Inter	27px	500	#A09D98	1
text-23px	Inter	23px	500	#545454	1
text-14px	Inter	14px	400	#5A8C83	1
text-13px	Inter	13px	400	#616161	1
text-13px	Inter	13px	400	#595959	1
text-12px	Inter	12px	300	#7C7C7C	1
text-12px	Inter	12px	400	#9FD4D0	1
text-11px	Inter	11px	400	#555555	1

Typography Reference

Font Families:

• Inter (used 36x)

Font Sizes: 7px, 8px, 9px, 10px, 11px, 12px, 13px, 14px, 23px, 27px, 32px, 46px

Spacing

• MUST use 4px grid for spacing
• SHOULD use spacing from scale: 2px, 3px, 5px, 6px, 7px, 8px, 25px, 35px
• 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: 1px, 3px, 5px
• MUST use 1px border width consistently
• SHOULD use 5px 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: 1px, 3px, 5px

Layout

• MUST design for 1920px base viewport width
• SHOULD use consistent element widths: 35px, 41px, 54px, 15px, 14px
• 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

• Header: height: 72px
• Main Content: width: 1920px, height: 1009px

Components

Buttons

Variant	Background	Text	Border	Height	Radius
Ghost	transparent	#436960	none	-	-

Interactive States

Focus

• MUST use 2px outline with accent color (#116F64)
• MUST use 2px outline-offset
• NEVER remove focus indicators

Hover

• Buttons (primary): lighten background by 10%
• Buttons (secondary): use #929493 background
• List items: use #929493 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