Add inward shadow in the general Layout.tsx component **Visual Examples:** - **Current:** <img width="1860" height="997" alt="Image" src="https://github.com/user-attachments/assets/a02b149e-2c9f-48d3-a020-a2ceefcad586" /> - **Proposed:** <img width="1137" height="836" alt="Image" src="https://github.com/user-attachments/assets/ae541b55-3923-4785-a02c-748e587dc2c0" /> - **Inspiration:** https://www.figma.com/proto/30y4S7ZfFo92GAwV2uacOG/Student-DB_CoSA