Fullstack Design System
Design system patterns for Next.js/NestJS full-stack applications.
Extends: Generic Design System - Read base skill for color theory, typography scale, spacing system, and component states.
Theme Configuration
lib/theme.ts Structure
// lib/theme.ts - Single source of truth
export const theme = {
colors: {
primary: "hsl(220, 100%, 55%)",
secondary: "hsl(180, 100%, 50%)",
accent: "hsl(270, 70%, 60%)",
},
spacing: {
xs: "4px",
sm: "8px",
md: "16px",
lg: "24px",
},
};
CSS Variables (globals.css)
:root {
--background: #ffffff;
--foreground: #0a0a0f;
--primary: hsl(220, 100%, 55%);
--primary-foreground: #ffffff;
}
.dark {
--background: #0a0a0f;
--foreground: #fafafa;
}
Tailwind Integration
// tailwind.config.js
module.exports = {
theme: {
extend: {
colors: {
background: "var(--background)",
foreground: "var(--foreground)",
primary: "var(--primary)",
},
},
},
};
shadcn/ui Patterns
Button Variants
import { Button } from '@/components/ui/button';
<Button>Primary</Button>
<Button variant="outline">Secondary</Button>
<Button variant="destructive">Delete</Button>
<Button variant="ghost">Cancel</Button>
<Button size="sm">Small</Button>
<Button size="lg">Large</Button>
Form Components
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
<div className="space-y-2">
<Label htmlFor="email">Email</Label>
<Input id="email" type="email" placeholder="user@example.com" />
</div>;
Dialog/Modal
import {
Dialog,
DialogContent,
DialogHeader,
DialogTitle,
} from "@/components/ui/dialog";
<Dialog open={open} onOpenChange={setOpen}>
<DialogContent>
<DialogHeader>
<DialogTitle>Confirm Action</DialogTitle>
</DialogHeader>
{/* Content */}
</DialogContent>
</Dialog>;
Visual Effects
Glassmorphism
.glass {
background: hsl(var(--card) / 0.5);
backdrop-filter: blur(12px);
border: 1px solid hsl(var(--border) / 0.5);
}
Gradient Backgrounds
.bg-gradient {
background: linear-gradient(135deg, var(--primary), var(--accent));
}
Dark Mode Implementation
Next.js + next-themes
// app/layout.tsx
import { ThemeProvider } from "next-themes";
export default function RootLayout({ children }) {
return (
<html suppressHydrationWarning>
<body>
<ThemeProvider attribute="class" defaultTheme="system">
{children}
</ThemeProvider>
</body>
</html>
);
}
Theme Toggle
import { useTheme } from "next-themes";
function ThemeToggle() {
const { theme, setTheme } = useTheme();
return (
<button onClick={() => setTheme(theme === "dark" ? "light" : "dark")}>
Toggle theme
</button>
);
}
Asset Organization
public/
├── images/
│ ├── logo.svg
│ └── og-image.png # 1200x630, < 1MB
├── favicons/
│ ├── favicon.ico
│ ├── apple-touch-icon.png
│ └── favicon-32x32.png
└── site.webmanifest
See Also
- Generic Design System - Token organization, spacing
- Design Patterns - Atomic Design, component docs
- UX Principles - Visual hierarchy