.container{
	border: 2px solid black;
}
.rowl{
	border: 3px solid red;
}

.col{
	border: 3px solid green;
}
.nav{
	background: darkcyan;
}
.nav-link{
	color: #fff;
}
.nav-link:hover{
	color: #fff;
	background: sandybrown;
}