CSS Variables (Custom Properties)

Continue your CSS Tutorial learning path with hands-on explanation, code practice, and quiz.

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Course

CSS Tutorial

Estimated Time

8 min

Progress

29%

Track Position

15 / 51

Lesson Overview

Simple Explanation

CSS variables reusable design tokens hoti hain. root me define kar ke poori app me use kar sakte hain.

Code Explanation

var() function variable values ko consume karta hai aur maintainability improve hoti hai.

Output Description

Single value change se multiple components ka style update ho jayega.

Practice Exercise

Ek mini design system banao: colors, spacing aur radius variables define karo.

Extra Explanation

Why This Matters

CSS Variables (Custom Properties) helps you build visual consistency. Reusable classes and a predictable spacing system make interfaces faster and cleaner to build.

Real-World Workflow

Teams usually begin with design tokens for colors, spacing, and type scale. This keeps new components consistent and avoids random values.

Common Mistakes to Avoid

Over-specific selectors, excessive !important use, and mixed units create avoidable bugs. Mobile-first CSS keeps responsive behavior more stable.

Example + Live Practice

:root {
  --primary: #0ea5e9;
  --surface: #f8fafc;
  --radius: 12px;
}

.button {
  background: var(--primary);
  border-radius: var(--radius);
}

.card {
  background: var(--surface);
}

Try It Yourself

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Test Your Knowledge

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Save Your Work

Lesson ke end par apna code save karein. Dashboard me aap kabhi bhi is saved code ko dobara dekh sakte hain.