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:
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
1---2name: bear-ui-skills3description: Bear's UI design system. Use when building interfaces inspired by Bear's aesthetic - light mode, Inter font, 4px grid.4license: MIT5---6
7# Bear UI Skills
8
9Opinionated constraints for building Bear-style interfaces with AI agents.
10
11## When to Apply
12
13Reference these guidelines when:
14- Building light-mode interfaces
15- Creating Bear-inspired design systems
16- Implementing UIs with Inter font and 4px grid
17
18## Colors
19
20- SHOULD use light backgrounds for primary surfaces
21- MUST use `#FFFFFF` as page background (`surface-base`)
22- SHOULD reduce color palette (currently 16 colors detected)
23- MUST maintain text contrast ratio of at least 4.5:1 for accessibility
24
25### Semantic Tokens
26
27| Token | HEX | RGB | Usage |
28|-------|-----|-----|-------|
29| `surface-base` | #FFFFFF | rgb(255,255,255) | Page background |
30| `surface-raised` | #DDDDDE | rgb(221,221,222) | Cards, modals, raised surfaces |
31| `surface-overlay` | #232428 | rgb(35,36,40) | Overlays, tooltips, dropdowns |
32| `text-primary` | #8B8C90 | rgb(139,140,144) | Headings, body text |
33| `text-secondary` | #7D7D7F | rgb(125,125,127) | Secondary, muted text |
34| `text-tertiary` | #AB8C8E | rgb(171,140,142) | Additional text |
35| `border-default` | #EFEFEF | rgb(239,239,239) | Subtle borders, dividers |
36
37## Typography
38
39- MUST use `Inter` as primary font family
40- SHOULD use single font family for consistency
41- MUST use `50px` / `700` for primary headings
42- MUST use `14px` / `400` for body text
43- SHOULD reduce font weights (currently 5 detected)
44- MUST use `text-balance` for headings and `text-pretty` for body text
45- SHOULD use `tabular-nums` for numeric data
46- NEVER modify letter-spacing unless explicitly requested
47
48### Text Styles
49
50| Style | Font | Size | Weight | Color | Count |
51|-------|------|------|--------|-------|-------|
52| `heading-1` | Inter | 50px | 700 | #494949 | 1 |
53| `text-23px` | Inter | 23px | semi_bold | #474747 | 1 |
54| `text-23px` | Inter | 23px | 500 | #535353 | 1 |
55| `text-22px` | Inter | 22px | 400 | #A6A6A6 | 1 |
56| `text-20px` | Inter | 20px | 400 | #A7A7A7 | 1 |
57| `text-17px` | Inter | 17px | 400 | #A4A4A4 | 1 |
58| `text-17px` | Inter | 17px | 400 | #686868 | 1 |
59| `text-16px` | Inter | 16px | 400 | #7D7D7D | 1 |
60| `text-16px` | Inter | 16px | 300 | #808080 | 1 |
61| `text-16px` | Inter | 16px | 400 | #9B9B9B | 1 |
62
63### Typography Reference
64
65**Font Families:**
66- `Inter` (used 53x)
67
68**Font Sizes:** 7px, 10px, 11px, 12px, 13px, 14px, 15px, 16px, 17px, 20px, 22px, 23px, 50px
69
70## Spacing
71
72- MUST use 4px grid for spacing
73- SHOULD use spacing from scale: 1px, 2px, 3px, 4px, 5px, 6px, 7px, 8px
74- SHOULD use 7px as default gap between elements
75- NEVER use arbitrary spacing values (use design scale)
76- SHOULD maintain consistent padding within containers
77
78## Borders
79
80- MUST use border-radius from scale: 7px, 11px, 18px
81- SHOULD limit border widths to: 1px, 2px, 6px
82- SHOULD use 11px as default border-radius
83- NEVER use arbitrary border-radius values (use design scale)
84- SHOULD use subtle borders (1px) for element separation
85
86### Border Radius Reference
87
88**Scale:** 7px, 11px, 18px
89
90## Layout
91
92- MUST design for 1920px base viewport width
93- SHOULD use consistent element widths: 16px, 178px, 14px, 177px, 10px
94- SHOULD maintain text-heavy layout with clear hierarchy
95- NEVER use `h-screen`, use `h-dvh` for full viewport height
96- MUST respect `safe-area-inset` for fixed elements
97- SHOULD use `size-*` for square elements instead of `w-*` + `h-*`
98
99### Detected Layout Patterns
100
101- **Main Content**: width: 1920px, height: 1080px
102
103## Components
104
105### Buttons
106
107| Variant | Background | Text | Border | Height | Radius |
108|---------|------------|------|--------|--------|--------|
109| Ghost | transparent | #7D7D7F | none | - | - |
110
111## Interactive States
112
113### Focus
114
115- MUST use `2px` outline with accent color (`#5E6AD2`)
116- MUST use `2px` outline-offset
117- NEVER remove focus indicators
118
119### Hover
120
121- Buttons (primary): lighten background by 10%
122- Buttons (secondary): use `#DDDDDE` background
123- List items: use `#DDDDDE` background
124
125### Disabled
126
127- MUST use `opacity: 0.5`
128- MUST use `cursor: not-allowed`
129
130## Interaction
131
132- MUST use an `AlertDialog` for destructive or irreversible actions
133- SHOULD use structural skeletons for loading states
134- MUST show errors next to where the action happens
135- NEVER block paste in `input` or `textarea` elements
136- MUST add an `aria-label` to icon-only buttons
137
138## Animation
139
140- NEVER add animation unless it is explicitly requested
141- MUST animate only compositor props (`transform`, `opacity`)
142- NEVER animate layout properties (`width`, `height`, `top`, `left`, `margin`, `padding`)
143- SHOULD use `ease-out` on entrance animations
144- NEVER exceed `200ms` for interaction feedback
145- SHOULD respect `prefers-reduced-motion`
146
147## Performance
148
149- NEVER animate large `blur()` or `backdrop-filter` surfaces
150- NEVER apply `will-change` outside an active animation
151- NEVER use `useEffect` for anything that can be expressed as render logic
ihlamury