/* Fade Animation */
.fade-out {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.fade-in {
    opacity: 1;
    transition: opacity 0.3s ease-in-out;
}

/* Modal navigation buttons */
.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: none;
    padding: 10px 15px;
    font-size: 22px;
    cursor: pointer;
    border-radius: 5px;
    z-index: 10;
}

#prevBtn {
    left: 10px;
}

#nextBtn {
    right: 10px;
}

/* Smooth Zoom */
#modalImage {
    transition: transform 0.2s ease-in-out;
    cursor: grab;
}