bear-ui-skills
Bear's UI design system. Use when building interfaces inspired by Bear's aesthetic - light mode, Inter font, 4px grid.
What this skill does
# Bear UI Skills Opinionated constraints for building Bear-style interfaces with AI agents. ## When to Apply Reference these guidelines when: - Building light-mode interfaces - Creating Bear-inspired design systems - Implementing UIs with Inter font and 4px grid ## Colors - SHOULD use light backgrounds for primary surfaces - MUST use `#FFFFFF` as page background (`surface-base`) - SHOULD reduce color palette (currently 16 colors detected) - MUST maintain text contrast ratio of at least 4.5:1 for accessibility ### Semantic Tokens | Token | HEX | RGB | Usage | |-------|-----|-----|-------| | `surface-base` | #FFFFFF | rgb(255,255,255) | Page background | | `surface-raised` | #DDDDDE | rgb(221,221,222) | Cards, modals, raised surfaces | | `surface-overlay` | #232428 | rgb(35,36,40) | Overlays, tooltips, dropdowns | | `text-primary` | #8B8C90 | rgb(139,140,144) | Headings, body text | | `text-secondary` | #7D7D7F | rgb(125,125,127) | Secondary, muted text | | `text-tertiary` | #AB8C8E | rgb(171,140,142) | Additional text | | `border-default` | #EFEFEF | rgb(239,239,239) | Subtle borders, dividers | ## Typography - MUST use `Inter` as primary font family - SHOULD use single font family for consistency - MUST use `50px` / `700` for primary headings - MUST use `14px` / `400` 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 | 50px | 700 | #494949 | 1 | | `text-23px` | Inter | 23px | semi_bold | #474747 | 1 | | `text-23px` | Inter | 23px | 500 | #535353 | 1 | | `text-22px` | Inter | 22px | 400 | #A6A6A6 | 1 | | `text-20px` | Inter | 20px | 400 | #A7A7A7 | 1 | | `text-17px` | Inter | 17px | 400 | #A4A4A4 | 1 | | `text-17px` | Inter | 17px | 400 | #686868 | 1 | | `text-16px` | Inter | 16px | 400 | #7D7D7D | 1 | | `text-16px` | Inter | 16px | 300 | #808080 | 1 | | `text-16px` | Inter | 16px | 400 | #9B9B9B | 1 | ### Typography Reference **Font Families:** - `Inter` (used 53x) **Font Sizes:** 7px, 10px, 11px, 12px, 13px, 14px, 15px, 16px, 17px, 20px, 22px, 23px, 50px ## Spacing - MUST use 4px grid for spacing - SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 6px, 7px, 8px - SHOULD use 7px 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: 7px, 11px, 18px - SHOULD limit border widths to: 1px, 2px, 6px - SHOULD use 11px 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:** 7px, 11px, 18px ## Layout - MUST design for 1920px base viewport width - SHOULD use consistent element widths: 16px, 178px, 14px, 177px, 10px - 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: 1080px ## Components ### Buttons | Variant | Background | Text | Border | Height | Radius | |---------|------------|------|--------|--------|--------| | Ghost | transparent | #7D7D7F | 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 `#DDDDDE` background - List items: use `#DDDDDE` 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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