.portfolio {
    position: relative;
    overflow: hidden;
    border: 2px solid rgba(0, 0, 0, .25);
    margin: 20px;
    height: auto;
}

.portfolio img {
    width: 100%;
    transition: all .5s;
    max-height: 205px;

}

.portfolio:hover img {
    transform: scale(1.5) rotate(15deg);
}

.portfolio .btn-primary:not(:hover) {
    background: rgba(0, 0, 0, .4);
}



.portfolio .port-desc {
    opacity: 0;
    background: rgba(0, 0, 0, .5);
    transition: all .25s;
    color: #f8f8f8;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: 0;
}

.portfolio .port-desc p {
    width: 85%;
    margin: 30px auto 25px;
    text-shadow: 1px 1px 3px #000;
}

.portfolio:hover .port-desc {
    opacity: 1;
}


.portfolio-additional-text {
    font-weight: 300;
    margin-top: 10px;
}