#categoryTree ul,
#materialTree ul {
    list-style: none;
    padding-right: 0;
    margin: 0;
}

#categoryTree li,
#materialTree li {
    margin: 6px 0;
}

#categoryTree li ul,
#materialTree li ul {
    padding-right: 22px; /* عقب‌رفت زیرشاخه‌ها */
}

.tree-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.toggle {
    cursor: pointer;
    font-size: 18px;
}

.toggle-placeholder {
    width: 18px;
    display: inline-block;
}
.category-tree-container ul {
    list-style: none;
    margin: 0;
    padding-right: 12px;
}