Password request doesnt look good

Hi

I have just created a password protect gallery as a test and when I click on the gallery the password box pops up in the top left hand corner of my website – it doesnt look very good, how can I change this?

Also – how can clients create an account so they can log in and out of this? I know you have the ‘account’ section, however this takes you to a wordpress login…

Thank you
Anne
https://www.positive-impressphoto.com

https://www.ads-software.com/plugins/sunshine-photo-cart/