Try some resizing:

HTML font-size: 100%
Content --fs: 1rem
Sidebar --fs: 0.75rem
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Headline

Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsa, voluptatibus quia adipisci vel blanditiis voluptatum deserunt!

My Button

Headline

Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsa, voluptatibus quia adipisci vel blanditiis voluptatum deserunt!

My Button