#brx-header{background:transparent;-webkit-transition:background .5s ease-in-out;-o-transition:background .5s ease-in-out;transition:background .5s ease-in-out}#brx-header.scrolling{background:rgba(0,0,0,.4);backdrop-filter:blur(2px)}.color-scheme--alt #brx-header.scrolling{background:rgba(255,255,255,.8)}