.post-top-image {
    position: relative;
    height: 15vw;
}

.post-top-image > div {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(0,0,0,.5);
}

.post-top-image .container .post-title {
    padding-top: 15px;
    padding-bottom: 15px;
    font-size: 24px;
    color: white;
    font-weight: bold;
    margin: 0;
}