.main-navigation{position:-webkit-sticky;position:sticky;top:0;z-index:1000;background-color:#fff;box-shadow:0 2px 5px rgba(0,0,0,0.1)}@media (max-width:768px){.main-navigation{position:-webkit-sticky;position:sticky;top:0;z-index:1000;background-color:#fff;box-shadow:0 2px 5px rgba(0,0,0,0.1)}}