n26-ui-skills
N26's UI design system. Use when building interfaces inspired by N26's aesthetic - dark mode, Inter font, 4px grid.
What this skill does
# 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
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