Hey, good work on this one and for mithril? Hmm never heard about that before.
There are couple of suggestions from me
Excess usage of H1. In your markup, you used multiple h1 tags which is not recommended especially if it is a single page. Changing them to other tags will be great. Following best practices is really good.
Button. Your learn more is supposed to be a link right and I think
button
element is not the right element to use in here, it is supposed to bea
tag.
Aside from those mentioned. Your work is good. It resizes well when going in mobile as well as the layout in the desktop^