should be like this

So just a login dialogue in the header.

What I am able to accomplish is this:

View post on imgur.com

But its pretty ugly.
I would like best if the login dialogue is on the right side of my top-menu.
Anyone knows how I can do this?
I am using a child theme of 2017 theme.

Thank you for your help

#loginform{
	text-align: right; 
	float: right;
}

This one worked for me.
With the #loginform you apply changes to this specific form. Then you can add whatever you need.