The New CSSLightweight CSS library with modern defaults
The New CSS ships under 5KB gzipped. Fast to download, fast to parse, and fast to render. No build step, no config, no overhead.
Why lightweight matters
✓
Faster page loads — less CSS to download and parse means faster first contentful paint.
✓
Better Core Web Vitals — smaller render-blocking resources improve LCP and CLS.
✓
Works on slow connections — users on 3G or satellite benefit the most from small payloads.
What's included
Despite the small size, The New CSS includes everything you need for most websites:
- Layout utilities (flexbox, grid, containers)
- Spacing (margin, padding with consistent scale)
- Typography (font size, weight, line height)
- Colors (oklch-based palettes with text + background utilities)
- Borders, shadows, and radius
- Responsive breakpoints (sm, md, lg)
- Dark mode (automatic + manual toggle)
Quick start
<link rel="stylesheet" href="https://unpkg.com/the-new-css/dist/the-new-css.min.css">One line. No build step. No config file.
Compare the footprint
| Library | Gzipped size | Build step |
|---|---|---|
| The New CSS | ~5KB | No |
| Bootstrap CSS | ~23KB | No |
| Tailwind (purged) | ~10-30KB+ | Yes |