There are default paddings and margins. Please add the next code in Theme Options > Theme custom CSS: .et_b_header-menu.et_element-top-level .menu-static-block .item-link {margin: 0px;padding-left: 0px;}
.et_b_header-menu.et_element-top-level .menu-static-block .item-link {margin: 0px;padding-left: 0px;}
Regards