fix: unneeded horizontal scrolling on Onboarding pages

[lucasheriques]

Problem

Fixes #25527.

There's extra margin on the posthog onboarding pages that's causing an horizontal scroll.

Changes

Before	Header

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

N/A

How did you test this code?

Verified on localhost, since it's a UI only change

[github-actions]

Size Change: 0 B

Total Size: 1.11 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	1.11 MB

_{compressed-size-action}

[zlwaterfield]

I don't think using a fixed value will resolve this.

We should probably be using the negative of --scene-padding which is the reason we need to have the negative margin in the first place and it's dependant on the screen size.

[lucasheriques]

--scene-padding

ohh I didn't know we have that. yeah I just checked what was the padding on the scene and changed to the appropriate value.

thanks for the pointer!

[lucasheriques]

@zlwaterfield added a new spacing size to use --scene-padding in the tailwind config

[posthog-bot]

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week. If you want to permanentely keep it open, use the waiting label.

[zlwaterfield]

Sorry for the delay here, looks good!