Header Margin and Padding Customization

.header-inner .Header .titlewrapper,
.header-inner .Header .descriptionwrapper {
  padding-left: 5px;
  padding-right: 5px;
  padding-top: 0px;
  padding-bottom: 0px;
}

In the css class above, you can edit or add it, to customize margin or padding (as mention above padding for header) as you want
.
It quite simple.

add the red color code, you can adjust it in other template that similar where your header arranged, make the header padding narrow as close to 0px.