Header – White space above ,below and next to header image

Hello, I have some questions : 1. How I can remove the white space above ,below and next to header image. I foud a CSS cod in a previous comment but it is not working : hgroup.with-logo { padding-top: 0; } 2. I have the same problem with the slider image . I don't whant to have white spaces. Thank you in advance for your help Regards, Alin