Assuming you have an app configured to use Tailwind CSS, you’ll have a CSS file that contains

@tailwind base;
@tailwind components;
@tailwind utilities;

Go on Google Fonts for example, select a font, and you’ll be provided a @import for the CSS font.

For example this for the Inter font in various weights:

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@100;200;300;400;500;700;900&display=swap');

Add that to the CSS file, and then add this:

@layer base {
  html {
    font-family: Inter, system-ui, sans-serif;
  }
}

In the end, your CSS file will look like this:

@tailwind base;
@tailwind components;
@tailwind utilities;

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@100;200;300;400;500;700;900&display=swap');

@layer base {
  html {
    font-family: Inter, system-ui, sans-serif;
  }
}

Now your default font is that one, and you can use font-bold for example or font-medium to set various sizes.

Lessons in this unit:

0:	Introduction
1:	Box model properties
2:	Colors
3:	Typography
4:	Flexbox and Grid in Tailwind
5:	Modifiers
6:	Responsive design in Tailwind
7:	Apply a style to children with Tailwind
8:	How to fix Unknown at rule @tailwindcss (unknownAtRules) in VS Code
9:	How to align center vertically using Tailwind
10:	▶︎ How to use custom fonts with Tailwind CSS
11:	Setting up Tailwind CSS on Vite - css
12:	Show-hide an element based on existence of a parent class in Tailwind - css
13:	The Tailwind Cheat Sheet
14:	How to setup Tailwind with PurgeCSS and PostCSS
15:	You can’t generate classes dynamically in Tailwind