CSS selectors style.css from flipbook library are too general. Library overrides p, h1, h2, h3 and others globally.
Install module and add flipbook entity to your site via layout builder or paragraphs.
Global p-tag styles e.g. adds text-indent to all p-tags and global headline styles set font-sizes to all headlines on site.
Add wrapper-container with specific flipbook id or class to flipbook.html.twig and extend every unspecific css-selector in style.css by this class/id.
Active
10.0
Code