.pbc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
    margin-top: 20px;
}
.pbc-slot {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    background-color: #e6ffe6;
    cursor: pointer;
}
.pbc-slot.pbc-blocked {
    background-color: #eee;
    color: #888;
    cursor: not-allowed;
}