Frutiger Aero

STYLEKIT_STYLE_REFERENCE
style_name: Frutiger Aero
style_slug: frutiger-aero
style_source: /styles/frutiger-aero

# 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 Frutiger Aero design style expert. All generated code must follow these rules:

## Absolute Forbidden

- Dark or black backgrounds (bg-black, bg-gray-900, bg-slate-900)
- Sharp corners (rounded-none, rounded-sm)
- Monospace fonts (font-mono)
- Neon glow effects or harsh saturated colors
- Flat/matte surfaces without glass effect
- active:scale-[0.98] -- use active:scale-95 instead (Aero has jelly bounce physics)
- focus:ring without focus:ring-offset-sky-500 (ring invisible on sky-blue background)

## Must Follow

- Background: Sky blue gradients (from-sky-300 to-sky-500)
- Cards: Semi-transparent white (bg-white/30 to bg-white/70) with backdrop-blur-xl
- Borders: Subtle white borders (border-white/30 to border-white/60)
- Rounded corners: Always large (rounded-2xl or rounded-3xl)
- Glossy highlight: Absolute div with h-1/2 bg-gradient-to-b from-white/60 to-white/10 on buttons and cards
- Glass effect is mandatory on all cards and panels
- Generous padding and airy spacing

## Animation & Interaction Rules

- Aero Glossy Layer: Every button and major card MUST include an absolute div positioned at top-0 left-0 right-0 h-1/2 with bg-gradient-to-b from-white/60 to-white/10 rounded-t-full (or rounded-t-3xl for cards). On group-hover, this brightens to from-white/80 to-white/20. This simulates the classic Web 2.0 glossy top-half glass reflection.
- Aurora Orbs: Cards use two absolutely-positioned blur-3xl rounded-full divs -- one with bg-green-400/20 (top-right corner, -top-16 -right-16 w-40 h-40) and one with bg-sky-400/20 (bottom-left corner). On group-hover, both scale to group-hover:scale-150 and intensify (green-300/30, sky-300/30). Use transition-all duration-500. The orbs create the aurora/glow atmosphere.
- Luminous Glow: Primary buttons hover to hover:shadow-[0_8px_20px_rgba(2,132,199,0.6),0_0_30px_rgba(125,211,252,0.3),...]. The double shadow (directional + ambient) creates the luminous aqua water glow.
- Jelly Bounce: active:scale-95 (not 0.98 or 0.97). The 5% compression is the Aero "jelly" squash. Combined with active:translate-y-0 and active:shadow collapsing, it bounces back. use active:shadow-[0_2px_5px_...] (small shadow indicates pressed state).
- Card Float: hover:-translate-y-2 hover:scale-[1.02] -- more dramatic than other styles because glass panels feel lighter. Shadow expands to hover:shadow-[0_16px_48px_...].
- Focus Ring on Sky: focus:ring-2 focus:ring-sky-300 focus:ring-offset-2 focus:ring-offset-sky-500. Without ring-offset-sky-500, the ring blends into the sky-blue background and becomes invisible.
- Easing: duration-200 ease-out for buttons. duration-300 ease-out for cards. Aurora orbs use duration-500 (they expand slowly, like clouds).

## Color Palette

Sky gradients: from-sky-300, via-sky-400, to-sky-500
Glass panels: bg-white/30, bg-white/40, bg-white/50, bg-white/70
Text: text-white (on dark areas), text-sky-900 (on glass), text-sky-700/80 (secondary)
Accents: emerald-300/green-400 (nature aurora), sky-200/sky-300 (water aurora)

## Unique Elements (Aero-Only)

1. Glossy top-half: absolute h-1/2 white gradient overlay on every button and card
2. Aurora orbs: two blur-3xl absolute divs (green + sky-blue) that expand on group-hover
3. Luminous glow: multi-shadow combining directional + ambient sky-blue glow
4. Jelly bounce: active:scale-95 (5% compression, bigger than other styles)
5. Rounded-full capsule buttons (never square)

## Self Check

After generating code verify:
1. Sky-blue gradient background present
2. All panels have backdrop-blur and semi-transparent white backgrounds
3. Glossy top-half div present on buttons (h-1/2 absolute) and cards
4. Aurora orbs present on cards (green + sky-blue blur-3xl, group-hover:scale-150)
5. active:scale-95 (not scale-[0.98] or scale-[0.97])
6. focus:ring-offset-sky-500 on all focusable elements
7. Large rounded corners on all elements (rounded-2xl+)

---

# Frutiger Aero Design System

> Glass-textured aesthetics from the Windows Vista/7 era, blending sky-blue gradients, translucent frosted glass panels, and natural elements for a fresh, airy digital-nature feel.

## Design Philosophy

Frutiger Aero draws inspiration from the Windows Vista/7 Aero glass aesthetic -- sky-blue gradients, frosted glass panels, water droplets, and a feeling of floating in clean air.

Core principles:
- Translucency: Semi-transparent white panels over bright sky gradients
- Nature meets technology: Organic shapes, bubbles, and leaves blended with digital UI
- Light and airy: Generous whitespace, soft shadows, rounded corners everywhere
- Glossy reflections: Subtle gradient highlights that simulate light on glass surfaces

---

## Token Dictionary (exact class mapping)

### Border
```
Width: border
Color: border-white/40
Radius: rounded-3xl
```

### Shadow
```
sm: shadow-md
md: shadow-lg
lg: shadow-2xl
hover: hover:shadow-xl
focus: focus:shadow-lg
```

### Interaction
```
Hover translate: (none)
Hover scale: hover:scale-[1.01]
Hover opacity: hover:bg-white/50
Transition: transition-all duration-300 ease-out
Active: active:scale-[0.98]
```

### Typefaces
```
Heading: font-sans font-bold text-white drop-shadow-lg
Body: font-sans text-white/80
Mono: font-mono
```

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

### Spacing
```
Section: py-16 md:py-24
Container: px-6 md:px-8
Card: p-6 md:p-8
Gap sm: gap-4
Gap md: gap-6
Gap lg: gap-8
```

### Color roles
```
Background primary: bg-gradient-to-b from-sky-300 via-sky-400 to-sky-500
Background secondary: bg-white/30 backdrop-blur-xl
Background accent: bg-sky-200/30, bg-emerald-200/30, bg-blue-200/30
Text primary: text-white
Text secondary: text-sky-900
Text muted: text-white/60
Button primary: bg-gradient-to-b from-white/90 to-white/60 text-sky-700
Button secondary: bg-sky-500/20 text-white border border-white/30
```

---

## [FORBIDDEN]

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

### Banned classes
- `bg-black`
- `bg-gray-900`
- `bg-gray-950`
- `bg-slate-900`
- `rounded-none`
- `rounded-sm`
- `font-mono`
- `border-black`
- `border-gray-900`
- `backdrop-blur-sm`

### Banned patterns
- matches `^bg-(black|gray-9|slate-9)`
- matches `^rounded-(none|sm)$`
- matches `^font-mono$`
- matches `^border-(black|gray-9)`

### Why they are banned
- `bg-black`: Frutiger Aero uses light sky-blue backgrounds, not dark themes
- `bg-gray-900`: Frutiger Aero uses light sky-blue backgrounds, not dark themes
- `bg-gray-950`: Frutiger Aero uses light sky-blue backgrounds, not dark themes
- `bg-slate-900`: Frutiger Aero uses light sky-blue backgrounds, not dark themes
- `rounded-none`: Frutiger Aero requires large rounded corners (rounded-2xl or rounded-3xl)
- `rounded-sm`: Frutiger Aero requires large rounded corners (rounded-2xl or rounded-3xl)
- `font-mono`: Frutiger Aero uses clean sans-serif typography only
- `border-black`: Frutiger Aero uses subtle white borders (border-white/30 to border-white/50)
- `border-gray-900`: Frutiger Aero uses subtle white borders (border-white/30 to border-white/50)
- `backdrop-blur-sm`: Frutiger Aero requires strong blur (backdrop-blur-xl or higher)

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

---

## [REQUIRED]

### Every button must include
```
bg-gradient-to-b from-white/90 to-white/60
backdrop-blur-md
border border-white/50
rounded-full
text-sky-700
shadow-lg
hover:shadow-xl
transition-all duration-300
```

### Every card must include
```
bg-white/40 backdrop-blur-xl
border border-white/50
rounded-3xl
shadow-xl
```

### Every input must include
```
bg-white/30 backdrop-blur-md
border border-white/40
rounded-2xl
text-sky-900 placeholder:text-sky-400/50
focus:outline-none focus:border-white/70 focus:bg-white/40
transition-all
```

---

## [COMPARE] Frutiger Aero 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="bg-gradient-to-b from-white/90 to-white/60 backdrop-blur-md border border-white/50 rounded-full text-sky-700 shadow-lg hover:shadow-xl transition-all duration-300 bg-gradient-to-b from-white/90 to-white/60 text-sky-700">
  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="bg-white/40 backdrop-blur-xl border border-white/50 rounded-3xl shadow-xl p-6 md:p-8">
  <h3 class="font-sans font-bold text-white drop-shadow-lg 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-white/30 backdrop-blur-md border border-white/40 rounded-2xl text-sky-900 placeholder:text-sky-400/50 focus:outline-none focus:border-white/70 focus:bg-white/40 transition-all" placeholder="{PLACEHOLDER}" />
```

---

## [TEMPLATES] Frutiger Aero page skeletons

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

### Navigation
```html
<nav class="bg-gradient-to-b from-sky-300 via-sky-400 to-sky-500 text-white border border-white/40 px-6 md:px-8">
  <div class="flex items-center justify-between max-w-6xl mx-auto gap-6">
    <a href="/" class="font-sans font-bold text-white drop-shadow-lg text-xl md:text-2xl">
      {LOGO_TEXT}
    </a>
    <div class="flex gap-6 font-sans text-white/80 text-xs">
      {NAV_LINKS}
    </div>
  </div>
</nav>
```

### Hero section
```html
<section class="bg-sky-200/30 text-white py-16 md:py-24 px-6 md:px-8">
  <div class="max-w-4xl mx-auto">
    <h1 class="font-sans font-bold text-white drop-shadow-lg text-4xl md:text-6xl">
      {HEADLINE}
    </h1>
    <p class="font-sans text-white/80 text-sm md:text-base max-w-xl">
      {SUBHEADLINE}
    </p>
    <button class="bg-gradient-to-b from-white/90 to-white/60 backdrop-blur-md border border-white/50 rounded-full text-sky-700 shadow-lg hover:shadow-xl transition-all duration-300 bg-gradient-to-b from-white/90 to-white/60 text-sky-700">
      {CTA_TEXT}
    </button>
  </div>
</section>
```

### Card grid
```html
<section class="bg-gradient-to-b from-sky-300 via-sky-400 to-sky-500 text-white py-16 md:py-24 px-6 md:px-8">
  <div class="max-w-6xl mx-auto">
    <h2 class="font-sans font-bold text-white drop-shadow-lg text-2xl md:text-3xl">{SECTION_TITLE}</h2>
    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
      <!-- Card template - repeat for each card -->
      <div class="bg-white/40 backdrop-blur-xl border border-white/50 rounded-3xl shadow-xl p-6 md:p-8">
        <h3 class="font-sans font-bold text-white drop-shadow-lg text-xl md:text-2xl">{CARD_TITLE}</h3>
        <p class="font-sans text-white/80 text-sm md:text-base text-white/60">{CARD_DESCRIPTION}</p>
      </div>
    </div>
  </div>
</section>
```

### Form input
```html
<input class="bg-white/30 backdrop-blur-md border border-white/40 rounded-2xl text-sky-900 placeholder:text-sky-400/50 focus:outline-none focus:border-white/70 focus:bg-white/40 transition-all" placeholder="{PLACEHOLDER}" />
```

### Footer
```html
<footer class="bg-white/30 backdrop-blur-xl text-sky-900 py-16 md:py-24 px-6 md:px-8">
  <div class="max-w-6xl mx-auto">
    <div class="grid grid-cols-1 md:grid-cols-3 gap-8">
      <div>
        <span class="font-sans font-bold text-white drop-shadow-lg text-xl md:text-2xl">{LOGO_TEXT}</span>
        <p class="font-sans text-white/80 text-xs">{TAGLINE}</p>
      </div>
      <div>
        <h4 class="font-sans font-bold text-white drop-shadow-lg text-xl md:text-2xl">{COLUMN_TITLE}</h4>
        <ul class="font-sans text-white/80 text-xs">
          {FOOTER_LINKS}
        </ul>
      </div>
    </div>
  </div>
</footer>
```

---

## [CHECKLIST] Frutiger Aero post-generation self check

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

### Token check
- [ ] Button includes: `bg-gradient-to-b from-white/90 to-white/60 backdrop-blur-md border border-white/50 rounded-full text-sky-700 shadow-lg hover:shadow-xl transition-all duration-300`
- [ ] Card includes: `bg-white/40 backdrop-blur-xl border border-white/50 rounded-3xl shadow-xl`
- [ ] Input includes: `bg-white/30 backdrop-blur-md border border-white/40 rounded-2xl text-sky-900 placeholder:text-sky-400/50 focus:outline-none focus:border-white/70 focus:bg-white/40 transition-all`

### Forbidden check
- [ ] Not using `bg-black`
- [ ] Not using `bg-gray-900`
- [ ] Not using `bg-gray-950`
- [ ] Not using `bg-slate-900`
- [ ] Not using `rounded-none`
- [ ] Not using `rounded-sm`
- [ ] Not using `font-mono`
- [ ] Not using `border-black`

### Style rule check
- [ ] Use sky blue gradient backgrounds (from-sky-300 to-sky-500)
- [ ] Apply backdrop-blur and translucent white panels (bg-white/30 to bg-white/50)
- [ ] Use large rounded corners (rounded-2xl to rounded-3xl)
- [ ] Add glossy top-half highlight div (absolute, bg-gradient-to-b from-white/60 to-white/10, h-1/2) on buttons and cards
- [ ] Include nature-inspired decorative elements (bubbles, leaves, water) as absolute positioned blur divs

### Style drift check
- [ ] Does not violate: Don't use dark or black backgrounds
- [ ] Does not violate: Don't use sharp corners or angular shapes
- [ ] Does not violate: Don't use neon or harsh colors
- [ ] Does not violate: Don't use monospace fonts
- [ ] Does not violate: Don't use flat/matte surfaces without any glass effect

### 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 Frutiger Aero

---

## [EXAMPLES] Example prompts

### 1. Weather Dashboard

Aero glass weather panels on sky background

```
Create a weather dashboard in Frutiger Aero style:
1. Background: Full sky-blue gradient (from-sky-300 to-sky-500)
2. Main card: Current temperature with glass panel, large numbers
3. Hourly forecast: Horizontal scroll with small glass cards
4. Weekly forecast: List with glass rows
5. Decorative floating bubbles in the background
```

### 2. Music Player

Vista-style translucent music controls

```
Create a music player in Frutiger Aero style:
1. Background: Sky gradient with floating bubbles
2. Album card: Glass panel with cover art
3. Controls: Translucent play/pause buttons with glass effect
4. Progress bar: Glass track with glossy slider
5. Playlist: Side panel with glass rows
```

### 3. Product Showcase

Floating glass product cards on blue sky

```
Create a product showcase in Frutiger Aero style:
1. Background: Sky gradient with cloud-like decorations
2. Hero: Large title with glass overlay
3. Product grid: 3-column glass cards with hover float effect
4. Each card: Product image, name, price on translucent panel
5. CTA buttons: Glossy white glass with rounded-full
```

## Absolute Bans (Match and Refuse)

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

- use dark or black backgrounds
- use sharp corners or angular shapes
- use neon or harsh colors
- use monospace fonts
- use flat/matte surfaces without any glass effect
- use active:scale-[0.98] -- use active:scale-95 for the jelly bounce physics
- use focus:ring without focus:ring-offset-sky-500 (focus ring invisible on sky blue background)

## 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
- [ ] don't use dark or black backgrounds
- [ ] don't use sharp corners or angular shapes
- [ ] don't use neon or harsh colors
- [ ] don't use monospace fonts
- [ ] don't use flat/matte surfaces without any glass effect