I’m not sure if it is strictly a CSS issue or not – image is at https://snipboard.io/BoJL0u.jpg.
Seems like CSS might not be the best solution here, it’s most likely a theme/plugin conflict.
Have you tried disabling all plugins except WooCommerce & Stripe as well as switching to Storefront?
If the problem is not present after doing so, then you know there was a plugin conflict. You can enable plugins one by one again to find the culprit.
If that didn’t help, then please attach a copy of your site’s system status report so we can look further into this.
You can find it via WooCommerce > Status. Select “Get system report” and then “Copy for support”.? Once you’ve done that, paste it here in your response or in a Gist.
Let us know how it goes! ??