#if($backgroundImageUrl != '')
<style>
   body {
   	position: relative;
   	overflow-y: scroll;
   }
	
   body::before {
       content: '';
       display: block;
       top: 0;
       left: 0;
       width: 100vw;
       height: 100vh;
       z-index: -1;
       position: fixed;
       background-image: url('$backgroundImageUrl');
       background-size: cover;
       background-repeat: no-repeat;
       background-position: center;
   }
   
   @media (prefers-color-scheme: dark) {
        body::before {
        	background-image: url('$backgroundImageUrlDark');
        }
    }
</style>
#end