.gallery-grid {
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    padding: 210px 70px 70px; /* room for the nav bar */
}

.gallery-grid img {
    width: 100%;
    max-width: 700px;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
    cursor: pointer;
    transition: 0.3s;
}

.gallery-grid img:hover {
    opacity: 0.8;
}

/* Lightbox styles */
.lightbox {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 4px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    animation: zoom 0.3s;
}

@keyframes zoom {
    from {transform: translate(-50%, -50%) scale(0.8)} 
    to {transform: translate(-50%, -50%) scale(1)}
}

.lightbox-close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
    z-index: 1001;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

/* mobile */
@media (max-width: 900px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 6px;
        padding: 72px 4px 20px;
    }
    .lightbox-content { max-width: 96%; }
    .lightbox-close { top: 8px; right: 16px; }
}