.navbar .navbar-brand img{
    max-width: 200px;
}
nav
{ background-color:rgb(76,90,125);
  
    }
    .hea
    {z-index: 999;
        }
    .nav-link 
    {color: White;
        }
 .dropdown-toggle::after
 {
     }   
.dropdown:hover .dropdown-menu
{
    
    display: block;
    margin: 0;
    
}
@media screen and (min-width:768px) {
    .navbar .navbar-brand img{
        max-width: 7em;
    }
    .navbar .navbar-collapse{
        display: flex;
        flex-direction: column;
        align-items: flex-end;
    }
}