Mke topbar move with page

The following code will keep the topbar stationary while people view your site, it is helpful for customer navigation. You may need to use a plugin to remove the wordpress admin bar frontend, so you can view properly while editing.

#core_header_navigation {
top: 0px;
background: #ffffff;
height: 40px;
position: fixed;
margin-left: 0px;
margin-top: 0px;
margin-right:10px;
padding-bottom: 0px;
width: 100%;
z-index: 50;

margin-bottom: 0px;
overflow: hidden;
}

Also you may need to move your logo.

#core_logo {
margin-top: 42px;

Do amend colours to match your theme, you can change sizes if it does not work 100% for you