.menu-oscurecer{position:relative;z-index:9999}.menu-oscurecer::after{content:'';position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,0.55);opacity:0;visibility:hidden;pointer-events:none;transition:opacity 0.35s ease,visibility 0.35s ease;z-index:-1}.menu-oscurecer:hover::after{opacity:1;visibility:visible}