Single Event Page Background Color

Hello,

My website background color is set to black but in the single event page, I would like the white background to extend to the full page. The white background currently only covers the content part of the event page. Is there any CSS code that I can add to do this?

Link to page: https://scii.chula.ac.th/event/ai-literacy-for-c-suite-executives/

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