1. Fixed border-radius 2. Monaco ignores the alpha channel on the shadow color, introduce `color-shadow-opaque` 3. Remove scrollbar color which follows https://github.com/go-gitea/gitea/pull/29800 Before: <img width="34" alt="Screenshot 2024-07-13 at 15 38 18" src="https://github.com/user-attachments/assets/042d9bde-6db9-4467-a2a4-8f61ecc773eb"> <img width="35" alt="Screenshot 2024-07-13 at 15 38 31" src="https://github.com/user-attachments/assets/04146ee0-551c-4ff2-9636-bd119b33595a"> After: <img width="45" alt="Screenshot 2024-07-13 at 15 38 06" src="https://github.com/user-attachments/assets/1f58fa5a-1289-4e45-83c9-18ca82a5e266"> <img width="39" alt="Screenshot 2024-07-13 at 21 16 56" src="https://github.com/user-attachments/assets/e12ebe22-b29b-4798-9f0d-4c100f311562">
