.bg-img {
  background-image: url("https://dachbox.expert/bilder/bg600/15-600.webp");
  
  background-image: -webkit-linear-gradient(bottom, rgba(255,255,255,0.1), rgba(83,165,231,1)), url("https://dachbox.expert/bilder/bg600/15-600.webp");
  background-image: linear-gradient(to bottom, rgba(255,255,255,0.1), rgba(83,165,231,1)), url("https://dachbox.expert/bilder/bg600/15-600.webp");
}	 
		

@media (prefers-color-scheme: dark) {
		
.bg-img {
  background-image: url("https://dachbox.expert/bilder/bg600/15-600.webp");
  
  background-image: -webkit-linear-gradient(bottom, rgba(51,51,51,0), rgba(51,51,51,1)), url("https://dachbox.expert/bilder/bg600/15-600.webp");
  background-image: linear-gradient(to bottom, rgba(51,51,51,0), rgba(51,51,51,1)), url("https://dachbox.expert/bilder/bg600/15-600.webp");
}	 

}