Hi,

The online documentation is available here:

http://clapat-themes.com/helpcenter/humpton/

And if you can provide wp admin access in a private comment we can import demo data free of charge. This will give you a snapshot of our live demo you can start customizing from. Please specify the editor of your choice: Elementor or Gutenberg.

Hello,

that's because the logo has a fixed height of 50px and since the width is auto, it will try to cover the available space with the height of 50px.

try adding this CSS to customizer -> additional CSS

#logo img {
    height: auto;    
}