.hu-courses{
    margin-top: 150px;   
}

.hu-courses a{
    text-decoration: none;
    color: #000;
}

.course{
    border-radius: 12px;
    box-shadow: 1px 0px 9px 0px rgba(0, 0, 0, 0.4);
    padding: 13px;
    border: 3px solid #fff;
}

.course img{
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    object-position: 50% 70%;
}

.hu-courses a:hover .course{
    border: 3px solid var(--main);
}