.section-tree-layout__backdrop{background:var(--bds-color-background-high);display:none;height:calc(100vh - 2.5rem);opacity:.5;position:absolute;top:2.5rem;width:100%}[dir=ltr] .section-tree-layout__backdrop{left:0}[dir=rtl] .section-tree-layout__backdrop{right:0}.section-tree-layout--expanded .section-tree-layout__backdrop{display:block}