Elements of Seo theme, some questions.

Hi there,

I have some questions about the theme ‘Elements of Seo’.
Normally Google is my best friend, but in this case I can’t find the answers. So i’m searching for a new best friend. ??

1. I want to excerpt the content (in the blog), it’s way to long now.
2. I have a new header, but there is still a green line above the header. I want to remove it.
3. I want to insert a line above the blogtitle and under the date and time.

Please, does anyone know the answers? I’m very grateful if you do.
Thank you and enjoy your weekend!