the space from the left

Hello,

could you tell me please how can I make the distance left always 100px (desktop). 20px on mobile works, but 100px on desktop does not work.
mobile:https://postimg.cc/image/ep3ii1jkx/
desktop: https://postimg.cc/image/vqwcjmyap/

could you help me please?

Best Regards
Ilona

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