Flexible Grid

[felixgeiger]

Hello everyone,
I am currently building a website, my problem at the moment is, that the grid i have is not flexible and the content doesn't adjust to the size of the screen.
Does anyone have a solution to this?
Thank you in advance!

Link to the website as it is now:
https://philippgeiger.de/

[arminunruh]

you can right-click the text and choose set text width in pixels: