updated theme.css

[akash-arelli]

• [x] Included a Preview link and screenshot showing after and before the changes.
• [x] Included a description of the change below.
• [x] Squashed the commits.

Changes done in this Pull Request

• Preview Link
• Fixes #

Description / Changes

Solved this issue of the hollow button.

Screenshots if any:

Before:

After:

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[akash-arelli]

47

@kushthedude @mariobehling please review.

[akash-arelli]

@kushthedude @mariobehling @Raunaksingh100 preview link is now working fine.please review.