Header changes

Hi. I'm having difficulty with CSS -- a lot of the code is not being applied. - To disable Sticky Menu (when the header follows each page and scrolls down with the page while navigating) - To change the header size (it eats up too much of the page) : .wrapper, .site-header + .breadcrumb-area .entry-breadcrumbs, .woocommerce .site-header + .breadcrumb-area .entry-breadcrumbs - To change the color of hover over the arrows and navigation menu items to no color highlight. .menu-toggle:hover, .menu-toggle:focus, .tagcloud a:hover, .tagcloud a:focus { border-color: #f7f5ef; } .arrow-up:hover, .arrow-up:focus { border-bottom-color: #f7f5ef; } - To create a drop-down menu for some items on the navigation page on the header section. Any suggestions to why these changes aren't working in CSS? Thanks!