Split Screen

STYLEKIT_STYLE_REFERENCE
style_name: Split Screen
style_slug: split-screen
style_source: /styles/split-screen

# 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 frontend expert specializing in Split Screen layout. All generated code must strictly follow these constraints:

## Absolute Prohibitions

- Do NOT keep split layout on mobile (too narrow)
- Do NOT have identical content on both sides
- Do NOT create visual imbalance between panels
- Do NOT ignore content reading order
- Do NOT use harsh divider lines

## Must Follow

- Use CSS Grid: grid grid-cols-1 lg:grid-cols-2
- Mobile: stack vertically (grid-cols-1)
- Desktop: side by side (lg:grid-cols-2)
- Each panel: min-h-[50vh] on mobile, min-h-screen on desktop
- Balance visual weight between panels
- One side visual, one side content

## Layout Patterns

50/50 Split:
- grid-cols-1 lg:grid-cols-2
- Both panels equal width

60/40 Split:
- grid-cols-1 lg:grid-cols-[60fr_40fr]
- Emphasize one side

Sticky Split:
- One panel sticky (position: sticky, top: 0)
- Other panel scrolls

## Panel Content

Visual Panel:
- Full background image/color/video
- Minimal text overlay
- Center-aligned content

Content Panel:
- Ample padding (p-8 lg:p-16)
- Left-aligned text
- Clear hierarchy

## Responsive

Mobile: Stack vertically, visual panel first
Tablet: May start splitting at md:
Desktop: Full split with proper ratios

## Animation & Interaction Rules

- Counter-Weight Focus: Hover one panel while the opposite panel gently desaturates or fades in prominence.
- Sharp Editorial Cuts: Button hover uses direct black-white inversion with short duration and no gradient easing tricks.
- Screen-Spanning Lines: Center divider or split seam can briefly intensify on focus change, but motion stays minimal.
- Static Text: Descriptive text blocks must stay position-stable; avoid translate or scale on body copy.

## Self-Check

After generating code, verify:
1. Mobile layout stacks properly
2. Panels have contrasting content
3. Visual balance maintained
4. Reading order makes sense
5. Transitions are smooth

---

# Split Screen Design System

> Symmetric or asymmetric split-screen layout creating visual tension through contrast and balance. Commonly used for product showcases, brand stories, and comparison pages.

## Design Philosophy

Split Screen is a layout approach that divides the viewport into two or more regions, creating visual tension and narrative effect through contrast.

Core principles:
- Contrast emphasis: Highlight differences or connections through left-right contrast
- Visual balance: Maintain visual weight balance even when asymmetric
- Narrative guidance: Guide the user's gaze to flow between both sides
- Space utilization: Fully leverage the advantages of widescreen displays

---

## Token Dictionary (exact class mapping)

### Border
```
Width: border-0
Color: border-zinc-300
Radius: rounded-none
```

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

### Interaction
```
Hover translate: (none)
Hover scale: (none)
Hover opacity: hover:opacity-90
Transition: transition-all duration-500
Active: active:scale-95
```

### Typefaces
```
Heading: font-bold tracking-tight
Body: font-sans
Mono: font-mono
```

### Type scale
```
Hero: text-4xl md:text-6xl lg:text-7xl
H1: text-3xl md:text-5xl
H2: text-2xl md:text-4xl
H3: text-xl md:text-2xl
Body: text-base md:text-lg
Small: text-sm
```

### Spacing
```
Section: py-0
Container: px-8 md:px-12 lg:px-16
Card: p-8 lg:p-16
Gap sm: gap-2 md:gap-4
Gap md: gap-4 md:gap-6
Gap lg: gap-6 md:gap-8
```

### Color roles
```
Background primary: bg-black
Background secondary: bg-white
Background accent: bg-[#ff4757], bg-[#2ed573], bg-[#1e90ff], bg-[#ffa502]
Text primary: text-white
Text secondary: text-zinc-900
Text muted: text-zinc-500
Button primary: bg-black text-white
Button secondary: bg-white text-black border-2 border-black
```

---

## [FORBIDDEN]

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

### Banned classes
- `rounded-lg`
- `rounded-xl`
- `rounded-2xl`
- `rounded-full`
- `shadow-sm`
- `shadow-md`
- `shadow-lg`
- `shadow-xl`

### Banned patterns
- matches `^rounded-(?!none)`
- matches `^shadow-(?!none)`

### Why they are banned
- `rounded-lg`: Split Screen uses sharp edges for strong visual dividers
- `shadow-lg`: Split Screen relies on contrast between panels, not shadows

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

---

## [REQUIRED]

### Every button must include
```
px-8 py-4
font-semibold
transition-colors
```

### Every card must include
```
min-h-[50vh] lg:min-h-screen
flex flex-col justify-center
```

### Every input must include
```
bg-transparent
border-b-2 border-zinc-300
text-lg
focus:outline-none focus:border-black
transition-colors
```

---

## [COMPARE] Split Screen 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="px-8 py-4 font-semibold transition-colors bg-black 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="min-h-[50vh] lg:min-h-screen flex flex-col justify-center p-8 lg:p-16">
 <h3 class="font-bold tracking-tight text-xl md:text-2xl">{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="bg-transparent border-b-2 border-zinc-300 text-lg focus:outline-none focus:border-black transition-colors" placeholder="{PLACEHOLDER}" />
```

---

## [TEMPLATES] Split Screen page skeletons

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

### Navigation
```html
<nav class="bg-black text-white border-0 border-zinc-300 px-8 md:px-12 lg:px-16">
 <div class="flex items-center justify-between max-w-6xl mx-auto gap-4 md:gap-6">
 <a href="/" class="font-bold tracking-tight text-xl md:text-2xl">
 {LOGO_TEXT}
 </a>
 <div class="flex gap-4 md:gap-6 font-sans text-sm">
 {NAV_LINKS}
 </div>
 </div>
</nav>
```

### Hero section
```html
<section class="bg-[#ff4757] text-white py-0 px-8 md:px-12 lg:px-16">
 <div class="max-w-4xl mx-auto">
 <h1 class="font-bold tracking-tight text-4xl md:text-6xl lg:text-7xl">
 {HEADLINE}
 </h1>
 <p class="font-sans text-base md:text-lg max-w-xl">
 {SUBHEADLINE}
 </p>
 <button class="px-8 py-4 font-semibold transition-colors bg-black text-white">
 {CTA_TEXT}
 </button>
 </div>
</section>
```

### Card grid
```html
<section class="bg-black text-white py-0 px-8 md:px-12 lg:px-16">
 <div class="max-w-6xl mx-auto">
 <h2 class="font-bold tracking-tight text-2xl md:text-4xl">{SECTION_TITLE}</h2>
 <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4 md:gap-6">
 <!-- Card template - repeat for each card -->
 <div class="min-h-[50vh] lg:min-h-screen flex flex-col justify-center p-8 lg:p-16">
 <h3 class="font-bold tracking-tight text-xl md:text-2xl">{CARD_TITLE}</h3>
 <p class="font-sans text-base md:text-lg text-zinc-500">{CARD_DESCRIPTION}</p>
 </div>
 </div>
 </div>
</section>
```

### Form input
```html
<input class="bg-transparent border-b-2 border-zinc-300 text-lg focus:outline-none focus:border-black transition-colors" placeholder="{PLACEHOLDER}" />
```

### Footer
```html
<footer class="bg-white text-zinc-900 py-0 px-8 md:px-12 lg:px-16">
 <div class="max-w-6xl mx-auto">
 <div class="grid grid-cols-1 md:grid-cols-3 gap-6 md:gap-8">
 <div>
 <span class="font-bold tracking-tight text-xl md:text-2xl">{LOGO_TEXT}</span>
 <p class="font-sans text-sm">{TAGLINE}</p>
 </div>
 <div>
 <h4 class="font-bold tracking-tight text-xl md:text-2xl">{COLUMN_TITLE}</h4>
 <ul class="font-sans text-sm">
 {FOOTER_LINKS}
 </ul>
 </div>
 </div>
 </div>
</footer>
```

---

## [CHECKLIST] Split Screen post-generation self check

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

### Token check
- [ ] Button includes: `px-8 py-4 font-semibold transition-colors`
- [ ] Card includes: `min-h-[50vh] lg:min-h-screen flex flex-col justify-center`
- [ ] Input includes: `bg-transparent border-b-2 border-zinc-300 text-lg focus:outline-none focus:border-black transition-colors`

### Forbidden check
- [ ] Not using `rounded-lg`
- [ ] Not using `rounded-xl`
- [ ] Not using `rounded-2xl`
- [ ] Not using `rounded-full`
- [ ] Not using `shadow-sm`
- [ ] Not using `shadow-md`
- [ ] Not using `shadow-lg`
- [ ] Not using `shadow-xl`

### Style rule check
- [ ] Use CSS Grid or Flexbox for split screen grid grid-cols-2
- [ ] Large screens maintain split, small screens stack lg:grid-cols-2 grid-cols-1
- [ ] Use contrasting or complementary content
- [ ] Visual elements on one side, text content on the other
- [ ] Maintain visual weight balance between both sides

### Style drift check
- [ ] Does not violate: Do not have identical content on both sides (pointless split)
- [ ] Does not violate: Do not keep split layout on mobile (too narrow)
- [ ] Does not violate: Do not create severe visual weight imbalance between sides
- [ ] Does not violate: Do not ignore content reading order
- [ ] Does not violate: Do not make divider lines too harsh

### 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 Split Screen

---

## [EXAMPLES] Example prompts

### 1. 

，

```
Create a brand showcase page with split screen:
1. Left panel: Full-height gradient background with large brand logo
2. Right panel: Brand story with heading, paragraphs, and CTA
3. Mobile: Stack with visual panel first
4. Desktop: 50/50 split with min-h-screen
5. Navigation fixed at top with mix-blend-difference
6. Smooth scroll to next section
Use grid grid-cols-1 lg:grid-cols-2, contrasting colors
```

### 2. 

```
Create a product comparison split screen:
1. Left panel: Product A with dark background, white text
2. Right panel: Product B with light background, dark text
3. Each side: product image, features list, price, CTA
4. Hover effect: hovered side expands slightly
5. Mobile: Stack with A on top
6. Center divider with "VS" badge
Use contrasting colors, balanced visual weight
```

### 3. 

，

```
Create a portfolio project page with split screen:
1. Left panel: Sticky full-height project image gallery
2. Right panel: Scrollable project details
3. Right content: title, description, tech stack, links
4. Image gallery with navigation dots
5. Mobile: Image at top, details below
6. Previous/Next project navigation at bottom
Use sticky positioning for image, smooth scroll for details
```

## Absolute Bans (Match and Refuse)

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

- have identical content on both sides (pointless split)
- keep split layout on mobile (too narrow)
- create severe visual weight imbalance between sides
- ignore content reading order
- make divider lines too harsh

## 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
- [ ] do not have identical content on both sides (pointless split)
- [ ] do not keep split layout on mobile (too narrow)
- [ ] do not create severe visual weight imbalance between sides
- [ ] do not ignore content reading order
- [ ] do not make divider lines too harsh