/* full-screen overlay */
#preloader {
    position: fixed;
    inset: 0;
    /* top/right/bottom/left = 0 */
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 300ms ease, visibility 300ms ease;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* spinner inside overlay */
.loader {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 6px solid #e0e0e0;
    border-top-color: #1b85ff;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* main content hidden while loading (optional) */
main {
    opacity: 0;
    transition: opacity 300ms ease 200ms;
}

main.loaded {
    opacity: 1;
}

.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card img {
    transition: transform 0.3s ease;
}

.card:hover img {
    transform: scale(1.00);
}