.birch-block-bg-stone{background:var(--stone)}.birch-block-bg-ecru{background:var(--ecru)}.birch-block-bg-light{background:var(--light)}.birch-block-bg-white{background:#fff}.birch-block-bg-transparent{background:0 0}.birch-block-bg-gold{background:var(--gold)}.birch-block-bg-dark{background:var(--dark)}