Updated contacts (UJ, AS, TH) and contact-at-hifis.net

Closes #25

See merge request hifis/hifis.net!21

New title + slogan

See merge request hifis/hifis.net!20

Resolve "Make Helmholtz logo link to helmholtz.de"

Closes #23

See merge request hifis/hifis.net!19

Update .gitignore with IntelliJ configuration directory

See merge request hifis/hifis.net!17

Resolve "Without JS+narrow screens, top menu bar does not work"

Closes #16

See merge request hifis/hifis.net!16

Huste, Tobias authored 4 years ago and Erxleben, Fredo committed 4 years ago

- This change makes the hamburger menu work without requiring JS and by
only using CSS techniques
- It is implemented by using a technique refered to as checkbox hack: https://css-tricks.com/the-checkbox-hack/

Transfer Mission and HIFIS Structure

Closes #7

See merge request hifis/hifis.net!15

Increase number of news displayed on frontpage

Closes #9

See merge request hifis/hifis.net!14

- Only display the three most recent news entries on mobile
- Create an improved default image for news with default title images

- Redesign news cards
- Reduce border-radius

Added haicore news

See merge request hifis/hifis.net!13

(Oh /&§$)

Port news entries from hifis.net

See merge request hifis/hifis.net!11

- 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.

Add partner logos on frontpage

Closes #3

See merge request hifis/hifis.net!12