SuperDesign

Expert frontend design guidelines for creating beautiful, modern UIs. Use when building landing pages, dashboards, or any user interface.

Security Scan

The skill is an instruction-only frontend design guide and its requirements and instructions are coherent with that purpose.

Purpose & Capability

Name/description match the content of SKILL.md: design guidance, patterns, and implementation tips. The skill requests no binaries, env vars, or installs — appropriate for a pure design guidance skill. One minor inconsistency: registry metadata lists no homepage/source, while SKILL.md references https://superdesign.dev.

Instruction Scope

Instructions stay within UI design scope (layout, theme, animation, accessibility, code snippets). They reference external CDNs and third‑party asset hosts (cdn.tailwindcss.com, jsdelivr, unpkg, images.unsplash.com). This is expected for implementation examples, but the SKILL.md recommends using unpkg@latest and other unpinned endpoints which can be non-deterministic and should be reviewed before production use.

Install Mechanism

No install spec and no code files — lowest-risk model. Nothing is downloaded or executed by an install step.

Credentials

The skill declares no required environment variables or credentials and the instructions do not ask for secrets or system data. Environment/credential requests are proportionate (none).

Persistence & Privilege

always is false and model invocation is allowed (the platform default). The skill does not request persistent presence or elevated privileges.

Assessment

This skill is an instruction-only design guide and appears internally consistent. Before installing or using it in production, consider: (1) verify and pin any CDN/package versions (avoid unpkg@latest in production), (2) review third-party asset URLs (fonts, icons, images) for licensing and privacy implications, (3) note the registry metadata lacks a homepage/source even though SKILL.md cites superdesign.dev — if provenance matters, try to confirm the author/site, and (4) it's safe for the agent to use autonomously in the normal way, but never give it secrets or production credentials because the skill doesn't need them.

Frontend Design Skill

Use this skill when creating UI components, landing pages, dashboards, or any frontend design work.

Design Workflow

Follow this structured approach for UI design:

1. Layout Design — Think through component structure, create ASCII wireframes
2. Theme Design — Define colors, fonts, spacing, shadows
3. Animation Design — Plan micro-interactions and transitions
4. Implementation — Generate the actual code

1. Layout Design

Before coding, sketch the layout in ASCII format:

┌─────────────────────────────────────┐
│         HEADER / NAV BAR            │
├─────────────────────────────────────┤
│                                     │
│            HERO SECTION             │
│         (Title + CTA)               │
│                                     │
├─────────────────────────────────────┤
│   FEATURE   │  FEATURE  │  FEATURE  │
│     CARD    │   CARD    │   CARD    │
├─────────────────────────────────────┤
│            FOOTER                   │
└─────────────────────────────────────┘

2. Theme Guidelines

Color Rules:

• NEVER use generic bootstrap-style blue (#007bff) — it looks dated
• Prefer oklch() for modern color definitions
• Use semantic color variables (--primary, --secondary, --muted, etc.)
• Consider both light and dark mode from the start

Font Selection (Google Fonts):

Sans-serif: Inter, Roboto, Poppins, Montserrat, Outfit, Plus Jakarta Sans, DM Sans, Space Grotesk
Monospace: JetBrains Mono, Fira Code, Source Code Pro, IBM Plex Mono, Space Mono, Geist Mono
Serif: Merriweather, Playfair Display, Lora, Source Serif Pro, Libre Baskerville
Display: Architects Daughter, Oxanium

Spacing & Shadows:

• Use consistent spacing scale (0.25rem base)
• Shadows should be subtle — avoid heavy drop shadows
• Consider using oklch() for shadow colors too

3. Theme Patterns

Modern Dark Mode (Vercel/Linear style):

:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.970 0 0);
  --muted: oklch(0.970 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --border: oklch(0.922 0 0);
  --radius: 0.625rem;
  --font-sans: Inter, system-ui, sans-serif;
}

Neo-Brutalism (90s web revival):

:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0 0 0);
  --primary: oklch(0.649 0.237 26.97);
  --secondary: oklch(0.968 0.211 109.77);
  --accent: oklch(0.564 0.241 260.82);
  --border: oklch(0 0 0);
  --radius: 0px;
  --shadow: 4px 4px 0px 0px hsl(0 0% 0%);
  --font-sans: DM Sans, sans-serif;
  --font-mono: Space Mono, monospace;
}

Glassmorphism:

.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 1rem;
}

4. Animation Guidelines

Micro-syntax for planning:

button: 150ms [S1→0.95→1] press
hover: 200ms [Y0→-2, shadow↗]
fadeIn: 400ms ease-out [Y+20→0, α0→1]
slideIn: 350ms ease-out [X-100→0, α0→1]
bounce: 600ms [S0.95→1.05→1]

Common patterns:

• Entry animations: 300-500ms, ease-out
• Hover states: 150-200ms
• Button press: 100-150ms
• Page transitions: 300-400ms

5. Implementation Rules

Tailwind CSS:

<!-- Import via CDN for prototypes -->
<script src="https://cdn.tailwindcss.com"></script>

Flowbite (component library):

<link href="https://cdn.jsdelivr.net/npm/flowbite@2.0.0/dist/flowbite.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/flowbite@2.0.0/dist/flowbite.min.js"></script>

Icons (Lucide):

<script src="https://unpkg.com/lucide@latest/dist/umd/lucide.min.js"></script>
<script>lucide.createIcons();</script>

Images:

• Use real placeholder services: Unsplash, placehold.co
• Never make up image URLs
• Example: https://images.unsplash.com/photo-xxx?w=800&h=600

6. Responsive Design

Always design mobile-first and responsive:

/* Mobile first */
.container { padding: 1rem; }

/* Tablet */
@media (min-width: 768px) {
  .container { padding: 2rem; }
}

/* Desktop */
@media (min-width: 1024px) {
  .container { max-width: 1200px; margin: 0 auto; }
}

7. Accessibility

• Use semantic HTML (header, main, nav, section, article)
• Include proper heading hierarchy (h1 → h2 → h3)
• Add aria-labels to interactive elements
• Ensure sufficient color contrast (4.5:1 minimum)
• Support keyboard navigation

8. Component Design Tips

Cards:

• Subtle shadows, not heavy drop shadows
• Consistent padding (p-4 to p-6)
• Hover state: slight lift + shadow increase

Buttons:

• Clear visual hierarchy (primary, secondary, ghost)
• Adequate touch targets (min 44x44px)
• Loading and disabled states

Forms:

• Clear labels above inputs
• Visible focus states
• Inline validation feedback
• Adequate spacing between fields

Navigation:

• Sticky header for long pages
• Clear active state indication
• Mobile-friendly hamburger menu

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Quick Reference

Element	Recommendation
Primary font	Inter, Outfit, DM Sans
Code font	JetBrains Mono, Fira Code
Border radius	0.5rem - 1rem (modern), 0 (brutalist)
Shadow	Subtle, 1-2 layers max
Spacing	4px base unit (0.25rem)
Animation	150-400ms, ease-out
Colors	oklch() for modern, avoid generic blue

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Based on SuperDesign patterns — https://superdesign.dev