Centralized UI management through design tokens (CSS Variables) and Tailwind CSS configuration.
Benefits: Leveraging a single source of truth via CSS Variables allows for instant theme changes and ensures all components follow defined design tokens.
The globals.css file imports Tailwind v4, variables.css and theme.css, and defines base layers.
Configured in CSS: @theme inline in theme.css maps CSS variables to utilities, @custom-variant enables the dark class. No tailwind.config.ts.
Technical tokens in @theme: breakpoints and font sizes become utilities directly.
1@theme {
2 /* Breakpoints */
3 --breakpoint-xs: 30rem; /* 480px */
4 --breakpoint-sm: 40rem; /* 640px */
5 --breakpoint-md: 48rem; /* 768px */
6 --breakpoint-lg: 64rem; /* 1024px */
7 --breakpoint-xl: 80rem; /* 1280px */
8
9 /* Font sizes */
10 --text-xs: 0.75rem; /* 12px */
11 --text-sm: 0.875rem; /* 14px */
12 --text-base: 1rem; /* 16px */
13 --text-lg: 1.125rem; /* 18px */
14 --text-xl: 1.25rem; /* 20px */
15}All color tokens for light and dark modes, mapped to utilities via @theme inline.
1@custom-variant dark (&:is(.dark *));
2
3:root {
4 --background: #f7f7f9;
5 --foreground: #1a1a2e;
6 --card: #ffffff;
7 --card-foreground: #1a1a2e;
8 --popover: #ffffff;
9 --popover-foreground: #1a1a2e;
10 --primary: #36bffa;
11 --primary-foreground: #ffffff;
12 --secondary: #eef0f6;
13 --secondary-foreground: #1a1a2e;
14 --muted: #eef0f6;
15 --muted-foreground: #6b6f80;
16 --accent: #e6f6fe;
17 --accent-foreground: #1a1a2e;
18 --destructive: #e5484d;
19 --destructive-foreground: #ffffff;
20 --border: #e2e4ec;
21 --input: #e2e4ec;
22 --ring: #36bffa;
23 --radius: 0.5rem;
24 --shadow: 0px 4px 10px 0px hsl(211 30% 25% / 0.12);
25}
26
27.dark {
28 --background: #0f0f1a;
29 --foreground: #e8e9f0;
30 --card: #171726;
31 --card-foreground: #e8e9f0;
32 --popover: #171726;
33 --popover-foreground: #e8e9f0;
34 --primary: #36bffa;
35 --primary-foreground: #0f0f1a;
36 --secondary: #23233a;
37 --secondary-foreground: #e8e9f0;
38 --muted: #23233a;
39 --muted-foreground: #9a9cb0;
40 --accent: #1d2b3a;
41 --accent-foreground: #e8e9f0;
42 --destructive: #f2555a;
43 --destructive-foreground: #0f0f1a;
44 --border: #2a2a40;
45 --input: #2a2a40;
46 --ring: #36bffa;
47}
48
49@theme inline {
50 --color-background: var(--background);
51 --color-foreground: var(--foreground);
52 --color-card: var(--card);
53 --color-card-foreground: var(--card-foreground);
54 --color-popover: var(--popover);
55 --color-popover-foreground: var(--popover-foreground);
56 --color-primary: var(--primary);
57 --color-primary-foreground: var(--primary-foreground);
58 --color-secondary: var(--secondary);
59 --color-secondary-foreground: var(--secondary-foreground);
60 --color-muted: var(--muted);
61 --color-muted-foreground: var(--muted-foreground);
62 --color-accent: var(--accent);
63 --color-accent-foreground: var(--accent-foreground);
64 --color-destructive: var(--destructive);
65 --color-destructive-foreground: var(--destructive-foreground);
66 --color-border: var(--border);
67 --color-input: var(--input);
68 --color-ring: var(--ring);
69 --radius-lg: var(--radius);
70 --shadow-md: var(--shadow);
71}Tailwind initialization and base element styles.
1@import "tailwindcss";
2@import "./variables.css";
3@import "./theme.css";
4
5@layer base {
6 * {
7 @apply border-border outline-ring/50;
8 }
9 body {
10 @apply bg-background text-foreground;
11 font-family: 'Inter', system-ui, sans-serif;
12 }
13}Absolute restriction on standard Tailwind colors (blue-500, red-600, etc.) and static white/black. All colors must be derived from design tokens.
1/* ❌ INCORRECT: Hardcoded Tailwind colors (blue-500) and static white */
2<div className="bg-blue-500 text-white p-4">
3 Bad Example
4</div>
5
6/* ✅ CORRECT: Using design tokens */
7<div className="bg-primary text-primary-foreground p-4">
8 Good Example
9</div>
10
11/* ❌ INCORRECT: Arbitrary values */
12<div className="p-[17px] bg-[#ff0000]">
13 Bad Example
14</div>
15
16/* ✅ CORRECT: Using spacing scale */
17<div className="p-4 bg-destructive text-destructive-foreground">
18 Good Example
19</div>