Change my website design .

I have a PHP website with MYSQL Data Base, I want to give it a new fresh look. I can get templates. This is one day project, I don't need long projects, I knew it can be done in a few hours. I want it to be optimised for mobile devices.
important, I will not provide the files of the website, You will need to work remotely on my laptop via Anydesk or any other software.