Variables example 20

What this example teaches

Variables

Output

pricing section becomes easier to scan, align and resize without rewriting the markup.

Line-by-line explanation

• Line 1 sets up the Variables example: :root { --surface: #ffffff; --text: #0f172a; }.
• Line 2 adds one required part of the working pattern: [data-theme="dark"] { --surface: #111827; --text: #f8fafc; }.
• Line 3 adds one required part of the working pattern: .panel { background: var(--surface); color: var(--text); }.

Why this example is useful

This example is useful because it isolates variables without surrounding noise, so you can see the idea clearly.

Where it is used in real projects

Variables appears in real CSS work when a feature needs a clear pattern that can be reviewed and changed safely.

Beginner variation

Change one label, value or condition in the Variables example and run it again.

Advanced variation

Combine Variables with validation, error handling or reusable structure.