#header_box, #pageHeader, #logo, #pageHeader h1, #pageHeader h2  {display: none !important;}
.hidebox { min-height: 11vh;} 
@media only screen and (max-width: 767px) {.hidebox { min-height: 9vh;}}
@media only screen and (max-height: 600px) {.hidebox { min-height: 8vh;}}
@media only screen and (max-height: 480px) {.hidebox { min-height: 8vh;}}