things-ui-skills
Things's UI design system. Use when building interfaces inspired by Things's aesthetic - light mode, Inter font, 8px grid.
What this skill does
# Things UI Skills Opinionated constraints for building Things-style interfaces with AI agents. ## When to Apply Reference these guidelines when: - Building light-mode interfaces - Creating Things-inspired design systems - Implementing UIs with Inter font and 8px grid ## Colors - SHOULD use light backgrounds for primary surfaces - MUST use `#EEF2F5` as page background (`surface-base`) - MUST use `#729AE0` for primary actions and focus states (`accent`) - SHOULD limit color palette to 5 distinct colors - MUST maintain text contrast ratio of at least 4.5:1 for accessibility ### Semantic Tokens | Token | HEX | RGB | Usage | |-------|-----|-----|-------| | `surface-base` | #EEF2F5 | rgb(238,242,245) | Page background | | `text-primary` | #729AE0 | rgb(114,154,224) | Headings, body text | | `text-2` | #5A5E61 | rgb(90,94,97) | Additional text | | `text-tertiary` | #2F343B | rgb(47,52,59) | Additional text | | `accent` | #729AE0 | rgb(114,154,224) | Primary actions, links, focus | ## Typography - MUST use `Inter` as primary font family - SHOULD use single font family for consistency - MUST use `49px` / `700` for primary headings - MUST use `23px` / `400` 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 | 49px | 700 | #2F343B | 1 | | `body` | Inter | 23px | 400 | #5A5E61 | 1 | | `text-20px` | Inter | 20px | 500 | #729AE0 | 1 | | `text-19px` | Inter | 19px | semi_bold | #9298A0 | 1 | | `text-14px` | Inter | 14px | 400 | #9499A1 | 1 | | `text-14px` | Inter | 14px | 400 | #989CA4 | 1 | | `caption` | Inter | 11px | 400 | #989DA4 | 1 | ### Typography Reference **Font Families:** - `Inter` (used 7x) **Font Sizes:** 11px, 14px, 19px, 20px, 23px, 49px ## Spacing - MUST use 8px grid for spacing - SHOULD use spacing from scale: 72px - SHOULD use 72px as default gap between elements - NEVER use arbitrary spacing values (use design scale) - SHOULD maintain consistent padding within containers ## Borders - NEVER use arbitrary border-radius values (use design scale) - SHOULD use subtle borders (1px) for element separation ## Layout - MUST design for 1920px base viewport width - SHOULD use consistent element widths: 35px, 64px - 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 - **Main Content**: width: 1920px, height: 1024px ## Components ## Interactive States ### Focus - MUST use `2px` outline with accent color (`#729AE0`) - MUST use `2px` outline-offset - NEVER remove focus indicators ### Hover - Buttons (primary): lighten background by 10% - Buttons (secondary): use `surface-raised` background - List items: use `surface-raised` 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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