Case File · CSS

Responsive and Media Queries

Responsive and Media Queries is a core part of CSS. In this case file you'll learn what it is, why it matters, and how to use it in real code.

Understanding responsive and media queries well means you can read other people's CSS code with confidence, and avoid the most common beginner mistakes in this area.

Key points:

What responsive and media queries means in the context of CSS
A minimal example you can run or read in the playground on the right
A common mistake to avoid when working with responsive and media queries

/* CSS: Responsive and Media Queries */
body {
  font-family: sans-serif;
  background: #0B0F17;
  color: #E5E7EB;
}

.card {
  padding: 1rem;
  border-radius: 0.75rem;
  border: 1px solid #22D3EE55;
}

Tip: Try changing a value in the code on the right and re-running it — small experiments are the fastest way to build real intuition for responsive and media queries.

The Lab

Grid Variables