Linear Style

STYLEKIT_STYLE_REFERENCE
style_name: Linear Style
style_slug: linear-style
style_source: /styles/linear-style

# Hard Prompt

## When To Use
Use this when you want AI to generate code with strict style consistency. It is the safest default for production UI.

## How To Use
- Copy the full prompt into ChatGPT, Claude, Cursor, or another coding assistant.
- Append the concrete product/page requirement after the prompt.
- After generation, check the forbidden rules and interaction states before accepting the output.

Strictly follow the style rules below and maintain consistency. No style drift allowed.

## Requirements

- Prioritize style consistency first, then creative extension.
- When conflicts arise, treat prohibitions as the highest priority.
- Self-check before output: verify colors, typography, spacing, and interactions still match this style.

## Style Rules

You are a Linear Style design expert. This style emulates the design language of the Linear project management tool — precise, restrained, and developer-focused.

## Absolute Rules
- Background: #0a0a0b or bg-zinc-950 — always dark
- Text: text-white for primary, text-zinc-400 for secondary, text-zinc-500/600 for tertiary
- Borders: border border-white/10 — always 1px, always semi-transparent
- Brand color: #5e6ad2 (indigo-purple) — used sparingly for CTAs and accents
- Font: Inter only, tracking-tight, text-sm as default body size
- Border-radius: rounded-lg max, rounded-md for small elements

## Forbidden
- White or light backgrounds
- Large border-radius (rounded-2xl+)
- Colored shadows
- Multiple fonts
- High-saturation colors (except brand purple)
- Decorative elements (gradients as decoration, blobs, patterns)

## Interaction Pattern
- Use opacity for hover states: hover:opacity-90 or hover:bg-white/[0.06]
- Transitions must be fast: duration-150
- No scale transforms on hover
- Focus: focus:border-[#5e6ad2]/50

## Typography Scale
- Hero: text-4xl font-semibold tracking-tight
- Section: text-2xl font-semibold tracking-tight
- Body: text-sm text-zinc-400
- Label: text-xs text-zinc-500 font-medium uppercase tracking-wider

---

# Linear Style Design System

> Linear 。、、。。

## Design Philosophy

Linear Style draws from the beloved developer tool Linear. The design philosophy: "Every pixel has a purpose."

Core principles:
- Dark-first: near-black background (#0a0a0b), content is the only focus
- Precise typography: Inter font, fine-tuned letter-spacing, balanced line-height
- Restrained gradients: purple gradient only for primary CTAs and branding
- Subtle borders: 1px semi-transparent white borders for hierarchy
- No excess: no shadows, no oversized border-radius, no flashy effects

---

## Token Dictionary (exact class mapping)

### Border
```
Width: border
Color: border-white/10
Radius: rounded-lg
```

### Shadow
```
sm: shadow-none
md: shadow-none
lg: shadow-none
hover: shadow-none
focus: shadow-none
```

### Interaction
```
Hover translate: 
Hover scale: (none)
Hover opacity: (none)
Transition: transition-all duration-150
Active: active:opacity-80
```

### Typefaces
```
Heading: font-sans font-semibold tracking-tight
Body: font-sans text-sm
Mono: font-mono
```

### Type scale
```
Hero: text-4xl font-semibold tracking-tight
H1: text-2xl font-semibold tracking-tight
H2: text-xl font-semibold tracking-tight
H3: text-base font-medium tracking-tight
Body: text-sm
Small: text-xs
```

### Spacing
```
Section: py-12 md:py-20
Container: px-4 md:px-8
Card: p-5
Gap sm: gap-1.5
Gap md: gap-3
Gap lg: gap-5
```

### Color roles
```
Background primary: bg-[#0a0a0b]
Background secondary: bg-white/[0.03]
Background accent: bg-[#5e6ad2]
Text primary: text-white
Text secondary: text-zinc-400
Text muted: text-zinc-500
Button primary: bg-gradient-to-r from-[#5e6ad2] to-[#8b5cf6] text-white
Button secondary: bg-white/[0.03] text-white border border-white/10
```

---

## [FORBIDDEN]

These classes are banned in this style. Check for them before returning code:

### Banned classes
- `bg-white`
- `bg-gray-50`
- `bg-gray-100`
- `bg-slate-50`
- `rounded-2xl`
- `rounded-3xl`
- `rounded-full`
- `shadow-sm`
- `shadow-md`
- `shadow-lg`
- `shadow-xl`
- `shadow-purple-500/20`
- `shadow-indigo-500/20`
- `font-serif`
- `font-mono`
- `text-pink-400`
- `text-green-400`
- `text-orange-400`

### Banned patterns
- matches `^bg-(?:white|gray-(?:50|100)|slate-50)$`
- matches `^rounded-(?:2xl|3xl|full)$`
- matches `^shadow-(?:sm|md|lg|xl|2xl)$`
- matches `^shadow-.*\/\d+$`
- matches `^font-(?:serif|mono)$`

### Why they are banned
- `bg-white`: Linear Style uses dark backgrounds only (#0a0a0b)
- `rounded-2xl`: Linear Style uses rounded-lg max for restrained aesthetics
- `shadow-sm`: Linear Style avoids shadows entirely; uses borders for hierarchy
- `font-serif`: Linear Style uses Inter (sans-serif) exclusively
- `font-mono`: Linear Style uses Inter (sans-serif) exclusively for UI text

> WARNING: if your code contains any of the above, replace it before shipping.

---

## [REQUIRED]

### Every button must include
```
rounded-lg
font-medium
text-sm
transition-opacity duration-150
```

### Every card must include
```
rounded-lg
border border-white/10
bg-white/[0.03]
```

### Every input must include
```
rounded-lg
border border-white/10
bg-white/[0.03]
text-white text-sm
focus:outline-none
```

---

## [COMPARE] Linear Style wrong vs right

The wrong examples below stand for generic library defaults that were never adapted to this style. Do not read them as visual suggestions.

### Button

[WRONG] **Wrong** (generic component library default, do not copy):
```html
<button class="{GENERIC_LIBRARY_BUTTON_DEFAULT}">
 Click me
</button>
```

[CORRECT] **Right** (uses this style's tokens):
```html
<button class="rounded-lg font-medium text-sm transition-opacity duration-150 bg-gradient-to-r from-[#5e6ad2] to-[#8b5cf6] text-white">
 Click me
</button>
```

### Card

[WRONG] **Wrong** (generic card, not adapted to this style):
```html
<div class="{GENERIC_LIBRARY_CARD_DEFAULT}">
 <h3>{TITLE}</h3>
</div>
```

[CORRECT] **Right** (uses this style's card tokens):
```html
<div class="rounded-lg border border-white/10 bg-white/[0.03] p-5">
 <h3 class="font-sans font-semibold tracking-tight text-base font-medium tracking-tight">{TITLE}</h3>
</div>
```

### Input

[WRONG] **Wrong** (generic input, not adapted to this style):
```html
<input class="{GENERIC_LIBRARY_INPUT_DEFAULT}" />
```

[CORRECT] **Right** (uses this style's input tokens):
```html
<input class="rounded-lg border border-white/10 bg-white/[0.03] text-white text-sm focus:outline-none" placeholder="{PLACEHOLDER}" />
```

---

## [TEMPLATES] Linear Style page skeletons

These skeletons use this style's tokens only. Replace `{PLACEHOLDER}` values, but keep every token in place:

### Navigation
```html
<nav class="bg-[#0a0a0b] text-white border border-white/10 px-4 md:px-8">
 <div class="flex items-center justify-between max-w-6xl mx-auto gap-3">
 <a href="/" class="font-sans font-semibold tracking-tight text-base font-medium tracking-tight">
 {LOGO_TEXT}
 </a>
 <div class="flex gap-3 font-sans text-sm text-xs">
 {NAV_LINKS}
 </div>
 </div>
</nav>
```

### Hero section
```html
<section class="bg-[#5e6ad2] text-white py-12 md:py-20 px-4 md:px-8">
 <div class="max-w-4xl mx-auto">
 <h1 class="font-sans font-semibold tracking-tight text-4xl font-semibold tracking-tight">
 {HEADLINE}
 </h1>
 <p class="font-sans text-sm text-sm max-w-xl">
 {SUBHEADLINE}
 </p>
 <button class="rounded-lg font-medium text-sm transition-opacity duration-150 bg-gradient-to-r from-[#5e6ad2] to-[#8b5cf6] text-white">
 {CTA_TEXT}
 </button>
 </div>
</section>
```

### Card grid
```html
<section class="bg-[#0a0a0b] text-white py-12 md:py-20 px-4 md:px-8">
 <div class="max-w-6xl mx-auto">
 <h2 class="font-sans font-semibold tracking-tight text-xl font-semibold tracking-tight">{SECTION_TITLE}</h2>
 <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-3">
 <!-- Card template - repeat for each card -->
 <div class="rounded-lg border border-white/10 bg-white/[0.03] p-5">
 <h3 class="font-sans font-semibold tracking-tight text-base font-medium tracking-tight">{CARD_TITLE}</h3>
 <p class="font-sans text-sm text-sm text-zinc-500">{CARD_DESCRIPTION}</p>
 </div>
 </div>
 </div>
</section>
```

### Form input
```html
<input class="rounded-lg border border-white/10 bg-white/[0.03] text-white text-sm focus:outline-none" placeholder="{PLACEHOLDER}" />
```

### Footer
```html
<footer class="bg-white/[0.03] text-zinc-400 py-12 md:py-20 px-4 md:px-8">
 <div class="max-w-6xl mx-auto">
 <div class="grid grid-cols-1 md:grid-cols-3 gap-5">
 <div>
 <span class="font-sans font-semibold tracking-tight text-base font-medium tracking-tight">{LOGO_TEXT}</span>
 <p class="font-sans text-sm text-xs">{TAGLINE}</p>
 </div>
 <div>
 <h4 class="font-sans font-semibold tracking-tight text-base font-medium tracking-tight">{COLUMN_TITLE}</h4>
 <ul class="font-sans text-sm text-xs">
 {FOOTER_LINKS}
 </ul>
 </div>
 </div>
 </div>
</footer>
```

---

## [CHECKLIST] Linear Style post-generation self check

**Before returning code, verify every token and rule below. Fix any violation before delivering:**

### Token check
- [ ] Button includes: `rounded-lg font-medium text-sm transition-opacity duration-150`
- [ ] Card includes: `rounded-lg border border-white/10 bg-white/[0.03]`
- [ ] Input includes: `rounded-lg border border-white/10 bg-white/[0.03] text-white text-sm focus:outline-none`

### Forbidden check
- [ ] Not using `bg-white`
- [ ] Not using `bg-gray-50`
- [ ] Not using `bg-gray-100`
- [ ] Not using `bg-slate-50`
- [ ] Not using `rounded-2xl`
- [ ] Not using `rounded-3xl`
- [ ] Not using `rounded-full`
- [ ] Not using `shadow-sm`

### Style rule check
- [ ] Near-black backgrounds: bg-[#0a0a0b] or bg-zinc-950
- [ ] Text hierarchy: text-white and text-zinc-400
- [ ] Subtle borders: border border-white/10
- [ ] Button gradient: bg-gradient-to-r from-[#5e6ad2] to-[#8b5cf6]
- [ ] Inter font with tracking-tight or -tracking-[0.01em]

### Style drift check
- [ ] Does not violate: No white/light backgrounds (dark is the foundation)
- [ ] Does not violate: No large border-radius: rounded-2xl, rounded-3xl, rounded-full
- [ ] Does not violate: No colored shadows or large shadows
- [ ] Does not violate: No multiple fonts (Inter only)
- [ ] Does not violate: No oversaturated colors (except brand purple)

### Delivery check
- [ ] Responsive layout holds on phone, tablet and desktop with no horizontal overflow
- [ ] Every interactive element has a visible focus state, an accessible name and a reduced-motion path
- [ ] Text contrast meets WCAG AA and colour alone never carries state
- [ ] The result is still recognizable at a glance as Linear Style

## Absolute Bans (Match and Refuse)

If any of the following patterns appear, it is a style violation — rewrite without exception.

- white/light backgrounds (dark is the foundation)
- large border-radius: rounded-2xl, rounded-3xl, rounded-full
- colored shadows or large shadows
- multiple fonts (Inter only)
- oversaturated colors (except brand purple)
- decorative elements (gradient backgrounds, blobs, noise textures)

## Self-Check (Verify Before Shipping)

If any item fails, the style has drifted — fix before shipping.

- [ ] No purple-to-blue gradients
- [ ] No overused fonts (Inter, Roboto, Geist, Fraunces, Plus Jakarta Sans)
- [ ] No nested cards (cards inside cards)
- [ ] No gray text on colored backgrounds
- [ ] Body text contrast meets WCAG AA (>= 4.5:1)
- [ ] No bounce or elastic easing curves
- [ ] Animations have a prefers-reduced-motion fallback
- [ ] Body text line length capped at 65-75 characters
- [ ] No side-stripe accent borders (border-left/right > 1px)
- [ ] No gradient text (background-clip: text)
- [ ] No glassmorphism used as the default surface treatment
- [ ] No tiny uppercase tracked eyebrow labels above every section heading
- [ ] no white/light backgrounds (dark is the foundation)
- [ ] no large border-radius: rounded-2xl, rounded-3xl, rounded-full
- [ ] no colored shadows or large shadows
- [ ] no multiple fonts (Inter only)
- [ ] no oversaturated colors (except brand purple)