CSS Guru to make quick fixes to Wordpress site within existing child theme

Need a CSS guru to customize the stylesheet within an existing child theme css file. Site built in wordpress so must make edits to the child theme so that future theme updates do not overwrite stylesheet changes. See site: [login to view URL] Edits required: 1. Move div#maincontent_homecontent (the box with the logo and the menu below) to align with the TOP of page, across the entire width (relative) of the browser. 2. Remove main navigation menu from appearing on home page only (add conditional statement) 3. Fix settings on the width of the main content/logo box when returning to the home page from any other page. 4. Fix duplicate top menu navigation (appearing in Firefox browser). 4. Add autoplay to media files on three pages (script is there, just turn on autoplay). Autoplay should be on the Home page, Photos, and Come Inside pages. There we go! Pretty straightforward but need it done ASAP! Thank you.