.course-box > div > .row {
    flex-flow: column;
    -webkit-flex-flow: column;
    -moz-flex-flow: column;
    -ms-flex-flow: column;
}
.course-box > div > .row [class*="col-"] {
    flex: 0 0 100%;
    -webkit-flex: 0 0 100%;
    -moz-flex: 0 0 100%;
    -ms-flex: 0 0 100%;
    max-width: inherit;
}
.course-box > div > .row [class*="col-"] + [class*="col-"] {
    margin-top: .25rem;
}
.course-box > div > .row [class*="col-"] .btn {
    width: 100%;
    font-size: 13px;
}