.nav{box-shadow: 0px 3px 5px 0px rgba(185, 185, 185, 11);}
.content-box{
	width: 1180px;
	margin: auto;
}
.course-item{
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.course-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
}