Coding⏱️ 2 min read📅 2026-05-31

How to Fix: CSS native variables not working in media queries

CSS variables not working in media queries due to incorrect usage. Use the `var(--variable-name)` syntax instead of `var(var(--variable-name))`.

Quick Answer: Check if you're using `var(--variable-name)` correctly, as it should be `var(--mobile-breakpoint)` instead of `var(var(--mobile-breakpoint)).

📋 Table of Contents

  1. 🔍 Why This Happens
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

CSS native variables not working in media queries is a common issue faced by many developers. This problem occurs when the CSS variable is not being evaluated correctly within a media query. There are a few reasons why this might happen.

🔍 Why This Happens

  • [Cause]

✅ Best Solutions to Fix It

Method 1: Using the `calc()` Function

  1. Step 1: Replace `var(--mobile-breakpoint)` with `calc(var(--mobile-breakpoint))` within your media query.

Method 2: Using the `--custom-unit` Property

  1. Step 1: Define a custom unit using the `--custom-unit` property, and then use it within your media query.

✨ Wrapping Up

By following these methods, you should be able to fix the issue of CSS native variables not working in media queries.

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