.sidebar{position:fixed;top:0;left:-250px;width:250px;height:100%;background-color:#003e7e;box-shadow:2px 0 5px rgba(0,0,0,0.5);padding:1em;transition:left .3s ease;z-index:1001}.sidebar.open{left:0}.backdrop{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.3);backdrop-filter:blur(5px);opacity:0;visibility:hidden;transition:opacity .3s ease;z-index:1000}.backdrop.active{opacity:1;visibility:visible}