.container {
    margin-top: 20px;
    margin-bottom: 20px;
}

.card{

    border: 0;
    margin-top: 40px;
    margin-bottom: 40px;
}

.card-header{
    color: secondary;
}


.card img{
    height: 250px;
    width: 100%;
    display: block;
}

.certificate{
    margin-bottom: 20px;
}

.certificate img{
    height:200px;
    display: inline-block;
}