#logo, #header_right { display: none; }

#header { display: block; margin: 25px; }

#header_center {height: 196px; width:210px; display: inline-block; overflow: hidden; }

#eventref {
     height: 83px;
     width: auto;
     background: url("https://www.questars.co.uk/wp-content/uploads/2022/03/Questars-Logo-white-background.png") center no-repeat;
     background-size: contain;
     overflow: hidden;
     display: block;
     margin-left: auto;
     margin-right: auto;
}

#eventref span { display: none; }