Hi I have no experience in CSS and…

Hi, I have no experience in CSSCSS CSS is an acronym for cascading style sheets. This is what controls the design or look and feel of a site. and I just want to change one thing in my wordpress theme. There is a white space in the headerHeader The header of your site is typically the first thing people will experience. The masthead or header art located across the top of your page is part of the look and feel of your website. It can influence a visitor’s opinion about your content and you/ your organization’s brand. It may also look different on different screen sizes. that I cannot make disappear! Please help!