.modal-body {
    position: relative;
}

.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.7);
    border: none;
    font-size: 2rem;
    padding: 1rem 0.5rem;
    cursor: pointer;
    border-radius: 2px;
}
#prevImage {
    left: 10px;
}
#nextImage {
    right: 10px;
}
.col-md-4>img{
    cursor: pointer;
}
h1, h2{
    text-align: center;
    color: #f6f9fc;
}
.modal-body img {
    width: auto;
    height: 100%;
    max-height: 90vh;
}
.modal-body img.vertical {
    height: auto;
    max-width: 90vw;
}
@media (max-width: 768px) {
    .modal-body img {
        max-height: 100vh;
    }
    .modal-body img.vertical {
        max-height: 90vh;
        width: auto;
    }
}