Hello Isabella,
Currently, you are using classic text and classic headline elements. V2 text element and V2 headline element has it’s own default styling and font settings. You also have more control over the element and has presets and other options.
The issue is that you are using classic text element and inside it, you used HTML content with h4 and/or other heading tags. This will use the global setting and the default stack styling. Adjusting this will require custom css since we are using percentage for default heading tags which then depends on the scaling or stepped root font size. This is all have been explain in the Responsive Typography which is located in our changelog: https://theme.co/changelog/#theme-x-5-1-0
Anyways, to easily change the font sizes of all heading tags, you can make use of this code:
h1, .h1 {
font-size: 100%;
}
h2, .h2 {
font-size: 100%;
}
h3, .h3 {
font-size: 100%;
}
h4, .h4 {
font-size: 100%;
}
h5, .h5 {
font-size: 100%;
}
h6, .h6 {
font-size: 100%;
}
They are all set to 100% which would reset the font size to inherit the font size of the container which is the classic text.
Feel free to adjust the values for each heading tag that would fit with your site design.