CSS allows you to specify font styles for text in your HTML documents. Here are some of the most common ways to specify font styles in CSS:

1. font-family: This property allows you to specify the font family to be used for the text. You can specify a specific font by name, or you can specify a generic font family (such as serif, sans-serif, or monospace).

body {
    font-family: Arial, sans-serif;
}

2. font-size: This property allows you to specify the size of the font. You can specify the size using either absolute or relative units. Absolute units include px (pixels), pt (points), and em (ems). Relative units include % (percent) and rem (root ems).

body {
    font-size: 16px;
}

3. font-weight: This property allows you to specify the boldness of the font. The possible values range from 100 to 900, with 400 being the normal weight and 700 being the boldest.

body {
    font-weight: bold;
}

4. font-style: This property allows you to specify whether the font should be italicized. The possible values are normal and italic.

body {
    font-style: italic;
}

5. font-variant: This property allows you to specify whether the font should be displayed in small caps. The possible values are normal and small-caps.

body {
    font-variant: small-caps;
}

You can use these properties, either individually or in combination, to specify a wide range of font styles for your HTML text. It’s a good idea to familiarize yourself with all of these properties so that you can choose the most appropriate ones for your needs.