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resend-ui-skills

Original：🇺🇸 English

Translated

Resend's UI design system. Use when building interfaces inspired by Resend's aesthetic - dark mode, Inter font, 4px grid.

1installs

Sourceihlamury/design-skills

Added on2026-02-07

NPX Install

npx skill4agent add ihlamury/design-skills resend-ui-skills

Tags

Translated version includes tags in frontmatter

resend-ui-design dark-mode-specs typography-guidelines spacing-system interface-components

SKILL.md Content

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Resend UI Skills

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

When to Apply

Reference these guidelines when:

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

Colors

MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 2
MUST use
```
#060606
```
as page background (
```
surface-base
```
)
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`	#060606	rgb(6,6,6)	Page background
`surface-raised`	#1D1D1D	rgb(29,29,29)	Cards, modals, raised surfaces
`text-primary`	#6E6E6E	rgb(110,110,110)	Headings, body text
`text-2`	#BBBBBB	rgb(187,187,187)	Additional text
`border-default`	#191919	rgb(25,25,25)	Subtle borders, dividers

Typography

MUST use
```
Inter
```
as primary font family
SHOULD use single font family for consistency
MUST use
```
88px
```
/
```
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

Style	Font	Size	Weight	Color	Count
`heading-1`	Inter	88px	700	#C8C8C8	1
`body`	Inter	18px	400	#646464	1
`body-secondary`	Inter	17px	500	#BFBFBF	1
`text-15px`	Inter	15px	400	#6A6A6A	1
`text-14px`	Inter	14px	400	#666666	1
`text-14px`	Inter	14px	400	#626262	1
`text-14px`	Inter	14px	400	#646464	1
`caption`	Inter	13px	400	#6E6E6E	1
`label`	Inter	12px	500	#BBBBBB	1
`label`	Inter	11px	400	#B6B6B5	1

Typography Reference

Font Families:

```
Inter
```
(used 13x)

Font Sizes: 11px, 12px, 13px, 14px, 15px, 17px, 18px, 88px

Spacing

MUST use 4px grid for spacing
SHOULD use spacing from scale: 4px, 5px, 13px, 19px, 22px, 60px
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: 15px
SHOULD limit border widths to: 2px, 3px
SHOULD use 15px 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: 15px

Layout

MUST design for 1920px base viewport width
SHOULD use consistent element widths: 8px
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: 963px
Header: height: 57px

Components

Buttons

Variant	Background	Text	Border	Height	Radius
Ghost	transparent	#BBBBBB	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
```
#1D1D1D
```
background
List items: use
```
#1D1D1D
```
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