.background-curtain{z-index:0;width:100%;height:100%;transition:background .4s ease-in-out;position:absolute;top:0;left:0}.background-curtain[data-background=beige]{background:var(--beige)}.background-curtain[data-background=dark]{background:var(--black)}.background-curtain[data-background=grey]{background:var(--grey)}.background-curtain[data-background=green]{background:var(--green)}.background-curtain[data-background=pink]{background:var(--light-pink)}.background-curtain[data-background=vibrant-pink]{background:var(--pink)}