.backdrop{display:none;position:fixed;left:0;top:0;width:100vw;height:100vh;z-index:40;background:rgba(18,18,18,0.51);}.backdrop--open{display:block;}.backdrop--open-enter-active{animation:fade-in 0.35s;}.backdrop--open-leave-active{animation:fade-out 0.3s;}