Neon UI Skills

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

When to Apply

Reference these guidelines when:

• Building dark-mode interfaces
• Creating Neon-inspired design systems
• Implementing UIs with Inter font and 4px grid

Colors

• MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 0
• MUST use #000000 as page background (surface-base)
• SHOULD reduce color palette (currently 15 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	#262626	rgb(38,38,38)	Cards, modals, raised surfaces
surface-overlay	#FEFEFE	rgb(254,254,254)	Overlays, tooltips, dropdowns
text-primary	#E3E3E3	rgb(227,227,227)	Headings, body text
text-2	#ACACAC	rgb(172,172,172)	Additional text
text-secondary	#6A6B6E	rgb(106,107,110)	Secondary, muted text
border-default	#262626	rgb(38,38,38)	Subtle borders, dividers

Typography

• MUST use Inter as primary font family
• SHOULD use single font family for consistency
• MUST use 54px / 700 for primary headings
• MUST use 16px / 500 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	54px	700	#E8E9E8	1
text-26px	Inter	26px	semi_bold	#E3E3E3	1
text-24px	Inter	24px	500	#2C2D2E	1
text-22px	Inter	22px	semi_bold	#7A7B80	1
text-20px	Inter	20px	500	#6A6B6E	1
text-20px	Inter	20px	500	#6C6D70	1
text-18px	Inter	18px	semi_bold	#74757A	1
text-17px	Inter	17px	500	#CECECE	1
body	Inter	16px	500	#707175	1
body-secondary	Inter	14px	400	#9E9E9E	2

Typography Reference

Font Families:

• Inter (used 26x)

Font Sizes: 5px, 9px, 11px, 12px, 14px, 16px, 17px, 18px, 20px, 22px, 24px, 26px, 54px

Spacing

• MUST use 4px grid for spacing
• SHOULD use spacing from scale: 4px, 5px, 8px, 22px, 58px
• 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: 16px, 17px, 19px, 21px
• SHOULD use 21px+ radius for pill-shaped elements
• MUST use 1px border width consistently
• SHOULD use 19px 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: 16px, 17px, 19px, 21px

Layout

• MUST design for 1920px base viewport width
• SHOULD use consistent element widths: 8px, 50px, 26px, 28px, 37px
• 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

• Header: height: 37px
• Main Content: width: 1920px, height: 988px
• Main Content: width: 1850px, height: 711px
• Main Content: width: 1920px, height: 721px

Components

Buttons

Variant	Background	Text	Border	Height	Radius
Ghost	transparent	#A3A3A3	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 #262626 background
• List items: use #262626 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