mercury-ui-skills: скилл для дизайна интерфейсов

--- name: mercury-ui-skills description: Mercury's UI design system. Use when building interfaces inspired by Mercury's aesthetic - light mode, Inter font, 4px grid. license: MIT metadata: author: design-skills version: "1.0.0" source: https://mercury.com --- # Mercury UI Skills Opinionated constraints for building Mercury-style interfaces with AI agents. ## When to Apply Reference these guidelines when: - Building light-mode interfaces - Creating Mercury-inspired design systems - Implementing UIs with Inter font and 4px grid ## Colors - SHOULD use light backgrounds for primary surfaces - MUST use `#000000` as page background (`surface-base`) - MUST use `#8B9CEC` for primary actions and focus states (`accent`) - SHOULD reduce color palette (currently 23 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` | #FFFFFF | rgb(255,255,255) | Cards, modals, raised surfaces | | `surface-overlay` | #ECEDEE | rgb(236,237,238) | Overlays, tooltips, dropdowns | | `text-primary` | #C2C2C2 | rgb(194,194,194) | Headings, body text | | `text-secondary` | #B0B0B0 | rgb(176,176,176) | Secondary, muted text | | `text-tertiary` | #D0D0D7 | rgb(208,208,215) | Additional text | | `border-default` | #FDFEFE | rgb(253,254,254) | Subtle borders, dividers | | `accent` | #8B9CEC | rgb(139,156,236) | Primary actions, links, focus | ## Typography - MUST use `Inter` as primary font family - SHOULD use single font family for consistency - MUST use `69px` / `700` for primary headings - MUST use `16px` / `700` 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 | 69px | 700 | #32312D | 1 | | `text-26px` | Inter | 26px | 500 | #4C4E4D | 1 | | `text-25px` | Inter | 25px | 400 | #5C5B5E | 1 | | `text-21px` | Inter | 21px | 400 | #726F69 | 1 | | `body` | Inter | 16px | 700 | #BBBCBF | 1 | | `body-secondary` | Inter | 15px | 400 | #A9A9A9 | 1 | | `body-secondary` | Inter | 15px | 400 | #A8A8A8 | 1 | | `body-secondary` | Inter | 15px | 400 | #AAAAAA | 1 | | `body-secondary` | Inter | 15px | 400 | #C4C6C5 | 1 | | `body-secondary` | Inter | 15px | 400 | #B1BBF3 | 1 | ### Typography Reference **Font Families:** - `Inter` (used 56x) **Font Sizes:** 9px, 11px, 12px, 13px, 14px, 15px, 16px, 21px, 25px, 26px, 69px ## Spacing - MUST use 4px grid for spacing - SHOULD use spacing from scale: 2px, 4px, 5px, 6px, 7px, 10px, 11px, 12px - 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: 3px, 4px, 10px, 13px, 16px, 18px, 21px - SHOULD use 21px+ radius for pill-shaped elements - SHOULD limit border widths to: 1px, 2px, 5px, 7px - SHOULD use 13px 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:** 3px, 4px, 10px, 13px, 16px, 18px, 21px ## Layout - MUST design for 1920px base viewport width - SHOULD use consistent element widths: 11px, 8px, 12px, 9px, 13px - 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: 563px - **Main Content**: width: 1920px, height: 625px - **Main Content**: width: 1352px, height: 605px - **Main Content**: width: 1139px, height: 595px - **Header**: height: 67px ## Components - MUST use `0px` height for input fields ### Buttons | Variant | Background | Text | Border | Height | Radius | |---------|------------|------|--------|--------|--------| | Ghost | transparent | #8E9090 | none | - | - | ### Inputs - Height: `0px` ## Interactive States ### Focus - MUST use `2px` outline with accent color (`#8B9CEC`) - MUST use `2px` outline-offset - NEVER remove focus indicators ### Hover - Buttons (primary): lighten background by 10% - Buttons (secondary): use `#FFFFFF` background - List items: use `#FFFFFF` 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