Several Tweaks to a PHP Shopping Mall

We would like you to make the following changes/additions to a newly launched shopping mall website: 1) The URLs are already supposed to be SEO friendly, but there is still a lot of unnecessary clutter in it. For instance this: mydomaindotcom/en_About+[login to view URL] We would like you to change it to /about-us and another link: /en_Create+your+[login to view URL] should become /create-your-store 2) Similarly the links to the users' products should become: /username/product-name 3) The site uses https, but in certain cases when you click to another page it changes to http://www.domaindotcom. It should be https://domaindotcom It is probably an htaccess issue. 4) Please change the header background color and take out the top links home, create your store, about us, contact. The login link should become a button and I would like you to move it to where the cart button is. The cart button should move down to under the navbar 5) The seller signup and seller area should be separate from the buyers' signup and users area. 6) The sellers will sell books and downloadable ebooks. Buyers should receive an email with a download link to the ebook that they bought. The seller should be able to upload his ebooks in his sellers area. 7) Please remove the social media links and icons from the footer. Please keep a record of your changes because I will need to know which files have been changed so that your changes don't get lost when the script needs updating. Thank you for your bid. Please give your final bid so that we both don't lose time. I look forward to working with you on a long-time basis. See file attached.