This reverts commit f512858c.

This does not implement multilanguage support for the whole website, but
only for the content of specific pages.

- Also make use of the {%- syntax to reduce whitespace in the generated
HTML for the team member includes
- Fix alignment of title in the section part

- Introduce a new card style
- Prepare all the other cards to be more generalized

This is achieved by reducing the size of the h1 heading from 4 to 3rem
and reducing the bottom padding from 3 to 2rem.