AgentSkillsCN

mobbin-ui-skills

Mobbin 的 UI 设计系统。在构建受 Mobbin 美学启发的界面时使用——浅色模式、Inter 字体、4px 网格。

SKILL.md
--- frontmatter
name: mobbin-ui-skills
description: Mobbin's UI design system. Use when building interfaces inspired by Mobbin's aesthetic - light mode, Inter font, 4px grid.
license: MIT
metadata:
  author: design-skills
  version: "1.0.0"
  source: https://mobbin.com

Mobbin UI Skills

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

When to Apply

Reference these guidelines when:

  • •Building light-mode interfaces
  • •Creating Mobbin-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 11 colors detected)
  • •MUST maintain text contrast ratio of at least 4.5:1 for accessibility

Semantic Tokens

TokenHEXRGBUsage
surface-base#FFFFFFrgb(255,255,255)Page background
surface-raised#0F0F0Frgb(15,15,15)Cards, modals, raised surfaces
surface-overlay#EEEEEFrgb(238,238,239)Overlays, tooltips, dropdowns
text-primary#B1B1B1rgb(177,177,177)Headings, body text
text-secondary#939393rgb(147,147,147)Secondary, muted text
text-tertiary#4A4A4Argb(74,74,74)Additional text
border-default#DEDEDErgb(222,222,222)Subtle borders, dividers

Typography

  • •MUST use Inter as primary font family
  • •SHOULD use single font family for consistency
  • •MUST use 75px / 700 for primary headings
  • •MUST use 18px / 400 for body text
  • •MUST limit font weights to: bold, regular, medium
  • •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

StyleFontSizeWeightColorCount
heading-1Inter75px700#1B1B1B1
text-20pxInter20px500#ACACAC1
text-19pxInter19px400#7C7C7C1
bodyInter18px400#B3B3B31
body-secondaryInter18px500#3A3A3A1
body-secondaryInter16px500#AFAFAF2
body-secondaryInter16px500#B2B2B21
body-secondaryInter16px500#B5B5B51
body-secondaryInter15px400#4D4D4D2
body-secondaryInter15px500#B1B1B11

Typography Reference

Font Families:

  • •Inter (used 17x)

Font Sizes: 8px, 11px, 12px, 14px, 15px, 16px, 18px, 19px, 20px, 75px

Spacing

  • •MUST use 4px grid for spacing
  • •SHOULD use spacing from scale: 2px, 3px, 4px, 5px, 18px
  • •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: 8px, 21px, 22px, 28px
  • •SHOULD use 21px+ radius for pill-shaped elements
  • •MUST use 1px border width consistently
  • •SHOULD use 21px 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: 8px, 21px, 22px, 28px

Layout

  • •MUST design for 1920px base viewport width
  • •SHOULD use consistent element widths: 72px, 61px, 27px, 78px
  • •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: 850px
  • •Header: height: 49px

Components

Buttons

VariantBackgroundTextBorderHeightRadius
Ghosttransparent#4A4A4Anone--

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 #0F0F0F background
  • •List items: use #0F0F0F 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