.topicbox { 	border:1px solid #44718a; 	border-radius: 0.45em; 	background-color: #CEE0F2; 	width: 100%;     margin-bottom: 1em; } .topicbox tbody > tr:not(:nth-child(3)) td { 	text-align: left; 	width: 90%; } .topicbox tbody > tr:nth-child(2) > td { background-color:#F5FAFF; } .topicbox tbody > tr:nth-child(3) > td { background-color:#FAFAFF; }  @media screen { 	/* forced night mode */ 	html.skin-theme-clientpref-night .topicbox { 	      background-color: transparent; 	      color: inherit; 	}  	html.skin-theme-clientpref-night .topicbox tbody > tr:nth-child(3) > td, 	html.skin-theme-clientpref-night .topicbox tbody > tr:nth-child(2) > td { 	      background-color: transparent; 	} }  @media screen and (prefers-color-scheme: dark) {     /* automatic mode */ 	html.skin-theme-clientpref-os .topicbox { 	      background-color: transparent; 	      color: inherit; 	} 	 	html.skin-theme-clientpref-os .topicbox tbody > tr:nth-child(3) > td, 	html.skin-theme-clientpref-os .topicbox tbody > tr:nth-child(2) > td { 	      background-color: transparent; 	} }