**Description** Improve the colour gradiant and the styling of calculator homepage **Screenshots** <img width="639" height="116" alt="Image" src="https://github.com/user-attachments/assets/2915521d-a7ea-49f2-a8e0-a5792a6b9118" /> The color gradients are not matching <img width="1422" height="770" alt="Image" src="https://github.com/user-attachments/assets/dcfcb23c-55b9-436e-9eb6-0f7ce37010ee" />