Setting Size of Map on large screens

Hi there,

i set up the new style of the events calendar and so far I like it a lot. Only issue is the displaying of Google Map on the events detail page.
The map is shown as tiny square and there is so much space to make the map better visible.
For example if I narrow the browser window down, all the information will be in one column instead of two and the map will stretch to the edges of the screen, like on a mobile device.
However, with a large computer screen it is just a small tiny square. Is there a way to have the map use the rest of the available screen space?
For an example, see above link or this screenshot
https://snipboard.io/EdlpxJ.jpg
Thanks

The page I need help with: [log in to see the link]