User Registration Form

Hoping you can provide direction on how to modify a few layout issues with the default User Registration Form loading in Gridbox.
As you can see from the attachment, "Name*" and "Email Address*" need to drop below to a new line. I have tried CSS override in Code Editor but no luck. When I apply the override via Inspector it works but not when added to Code Editor. If this requires template override, can you provide direction?

Thank you

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