.drop-zone {
    border-radius: var(--mud-default-borderradius);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

    .drop-zone.drag-over {
        border: 2px dashed #bbb;
        border-color: #004987;
        opacity: 0.5;
    }

    .drop-zone.no-drop {
        border: 2px dashed red;
        border-color: red;
        opacity: 0.5;
    }