| name | theme-styling |
| description | Apply consistent theming with Tailwind CSS 4, including dark mode support and design tokens. Use when styling components, fixing dark mode issues, or adjusting visual design. Use when this capability is needed. |
| metadata | {"author":"agentconfig"} |
Theme Styling
Apply consistent styling using Tailwind CSS 4 and the project's theme system.
Tailwind CSS 4
This project uses Tailwind CSS 4, which has significant changes from v3:
- Uses
@theme directive instead of theme() function
- PostCSS config uses
@tailwindcss/postcss
- CSS variables defined in
:root and .dark
Theme System
Colors are defined using CSS custom properties in site/src/index.css:
:root {
--background: oklch(0.97 0.01 85);
--foreground: oklch(0.20 0.02 250);
}
.dark {
--background: oklch(0.14 0.02 260);
--foreground: oklch(0.93 0.01 260);
}
See references/color-tokens.md for the complete token list.
Using Theme Colors
Always use semantic color names, not raw values:
<div className="bg-background text-foreground">
<div className="bg-card text-card-foreground">
<div className="border-border">
<button className="bg-primary text-primary-foreground">
// Bad - hardcoded colors
<div className="bg-white text-gray-900">
<div className="bg-[#1a1a2e]">
Dark Mode
Dark mode is implemented via the .dark class on the <html> element.
Adding Dark Mode Styles
Use the dark: variant for dark mode overrides:
<div className="bg-background text-foreground">
<div className="bg-white dark:bg-gray-900">
Testing Dark Mode
- Toggle with the theme switcher in the nav
- Or use browser DevTools to add/remove
.dark class on <html>
Spacing & Layout
Use consistent spacing from the Tailwind scale:
| Class | Size |
|---|
p-2 | 0.5rem (8px) |
p-4 | 1rem (16px) |
p-6 | 1.5rem (24px) |
p-8 | 2rem (32px) |
Mobile-First Responsive
Always start with mobile styles, then add larger breakpoints:
<div className="p-4 md:p-6 lg:p-8">
<div className="grid-cols-1 md:grid-cols-2 lg:grid-cols-3">
// Bad - desktop first
<div className="p-8 sm:p-6 xs:p-4">
Typography
Use the system font stack (already configured):
<h1 className="text-3xl font-bold">
<h2 className="text-2xl font-semibold"> // 24px semibold
<h3 className="text-xl font-medium"> // 20px medium
<p className="text-base"> // 16px regular
<span className="text-sm text-muted-foreground"> // 14px muted
Interactive States
Use consistent state styles:
<button className="
bg-primary text-primary-foreground
hover:bg-primary/90
focus-visible:ring-2 focus-visible:ring-ring
disabled:opacity-50 disabled:pointer-events-none
">
Animations
Use tw-animate-css for animations (already imported):
<div className="animate-fade-in">
<div className="animate-slide-up">
For custom transitions:
<div className="transition-colors duration-200">
<div className="transition-transform duration-300 hover:scale-105">
The cn() Helper
Always use cn() from @/lib/utils for conditional classes:
import { cn } from '@/lib/utils'
<div className={cn(
'base-styles',
isActive && 'active-styles',
className
)}>
Common Patterns
Card
<div className="bg-card text-card-foreground rounded-lg border border-border p-6">
Section
<section className="py-12 md:py-16 lg:py-20">
Button (Primary)
<button className="
px-4 py-2 rounded-md
bg-primary text-primary-foreground
hover:bg-primary/90
focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring
">
Checklist
Before considering styling complete:
Converted and distributed by TomeVault — claim your Tome and manage your conversions.
