.resources {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* Tablet */
@media (max-width: 1024px) {
    .course-resources {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 600px) {
    .course-resources {
        grid-template-columns: 1fr;
    }
}

.resource-item {
    text-align: center;
}

.resource-item a {
    display: block;
}

.pdf-thumb img {
    width: 100%;
    max-width: 150px;
    object-fit: cover;
    border-radius: 6px;
    transition: transform 0.2s ease;
}

.pdf-thumb:hover img {
    transform: scale(1.03);
}

.resource-title {
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
}