How to use css variables to setup your website responsive typography

CSS variables, also known as CSS custom properties, can be used to set up responsive typography for your website. They allow you to store values that can be reused throughout your stylesheet, and easily changed based on the screen size or other conditions.

Here's an example of how you can use CSS variables to set up responsive typography for your website:

Define your base font size and line-height as CSS variables:

:root {
    --base-font-size: 16px;
    --base-line-height: 1.5;
}

Use the CSS variables to set the font size and line-height for different elements:

body {
    font-size: var(--base-font-size);
    line-height: var(--base-line-height);
}

h1 {
    font-size: var(--base-font-size) * 2;
    line-height: var(--base-line-height);
}

p {
    font-size: var(--base-font-size);
    line-height: var(--base-line-height);
}

Use media queries to change the font size and line-height based on the screen size:

@media (min-width: 768px) {
    :root {
        --base-font-size: 18px;
    }
}

@media (min-width: 1024px) {
    :root {
        --base-font-size: 20px;
    }
}

This approach allows you to easily change the font size and line-height for different screen sizes, without having to go through your entire stylesheet and change the values manually.

You can also use CSS variables to set the font-family, and other typography-related properties of your website.

It's also worth noting that you can use JavaScript to change CSS variables based on user interaction or other events, this can give your website more dynamic functionality.

In summary, CSS variables are a powerful tool for setting up responsive typography for your website. They allow you to centralize the definition of font size, line-height, and other values, and easily change them based on the screen size or other conditions.