CSS Virtuemart

Hello, I have a Joomla website using Virtuemart as e-commerce. I would like to modify CSS of detail page and category page as following (please refer to attachment) : - Modify price presentation to have "price" on top with a certain font-size, and the price amount down the label "price" with an other font size (detail and category pages + color change on detail page). - "Taille" title in detail page (add to cart area) should be white instead of grey. Should apply to other "plugin titles" in this area on detail page. - Decrease the size of the options of the Sizes (S, M, L, XL buttons) on category page. Should not modify the other plugins in ths area). - Make the detail page content fully responsive with 2 columns, respecting the order of the exemple template. (1. title, 2. photo, [login to view URL] to cart area, [login to view URL], ...). I need to know all modified page and files so I can get this component updated without loose all the changes. Priority to the freelancer who can make all those changes work as template override located in /mytemplate/html/. Please only bid if you clearly understand all the work to do and are experienced with Joomla and Virtuemart. Thank you.