Alignment Issues with Items at top

I’ve never been able to figure out how to get my top three elements on the same line at the top – they currently take up too much vertical space. These include my logo, the search icon, and my login/register buttons. How can I get these all on the same line at the very top?

https://www.exegeticaltools.com

Also, I’ve tried uploading login and register buttons to use as pictures with links to the login and register page, but the images won’t show up. Does anyone know why that might happen?

Thanks