hello, on this "She fund" template I need you to please provide me the css to eliminate the transparency of the bar where there is the logo and the menu to avoid that the pages are seen scrolling below and create display problems. better fix color of header bar to white when scroll.Thank you. webpage is http://joomla345.atwebpages.com/

here screenshot https://prnt.sc/Vd_QsgXQ_UNe