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Var()

In CSS, the var() function is part of the CSS Custom Properties (CSS variables) feature. CSS variables allow you to define reusable values that can be referenced throughout your stylesheets. The var() function is then used to insert the value of a variable wherever it is needed.

CSS variables have several advantages:

1. Reusability: You can define values in one place and reuse them throughout your stylesheet, making it easier to maintain and update styles.
2. Dynamic Changes: CSS variables can be changed dynamically using JavaScript, allowing for dynamic theming and other interactive styling.
3. Good for multiple skin site