.category-tree {
    list-style: none;
    padding-left: 0;
    max-height: 70vh;
    overflow-y: auto;
}

.category-tree ul {
    list-style: none;
    padding-left: 20px;
}

.category-node {
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
    margin: 2px 0;
    display: flex;
    align-items: center;
    transition: background-color 0.2s;
}

.category-node:hover {
    background-color: #f8f9fa;
}

.category-node.active {
    background-color: #007bff;
    color: white;
}

.toggle-btn {
    margin-right: 8px;
    cursor: pointer;
    width: 20px;
    text-align: center;
    font-weight: bold;
}

.product-item {
    cursor: pointer;
    transition: all 0.2s;
}

.product-item.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
}

.product-item:hover:not(.active) {
    background-color: #f8f9fa;
}

.product-list {
    max-height: 70vh;
    overflow-y: auto;
}

.material-selector-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}

.material-selector-row select {
    flex: 1;
}