.hidden {
    display: none;
}

#gridView {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.panel {
    width: calc(33.333% - 10px);
    border: 1px solid #ccc;
    padding: 10px;
    box-sizing: border-box;
}

@media (max-width: 600px) {
    .panel {
        width: calc(100% - 10px);
    }
}