How to make Good Header?

Hi there,

Here is the <h2> styles:
https://www.screencast.com/t/kTxkkLZg

And <h3>:
https://www.screencast.com/t/2jDJ8yjq7CRz

You can always right click on the element and use the browser inspector tool to see the same thing I've shown in the screenshot above.

Would you give me the CSS for H1,H2 and H3?

Hi there,

these are the settings:

h1 {
    font-weight: 500;
    font-size: 40px
}

h2 {
    font-weight: 500;
    font-size: 33px
}

h3 {
    font-weight: 700;
    font-size: 20px
}

You can set those styles in the Customizer > Typography > Headings.
And they are using the System Font, so leave the Font selection as Inherit