feat: [Feature] Improve the UI design #4

[etnlbck]

• Lighten up the UI, while still maintaining a darker feel.
• Added top and bottom margin to form to give more space

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Name	Status	Preview	Comments	Updated (UTC)
storybook-gpt	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 7, 2023 5:55pm