.tree-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tree-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 3px 12px;
    user-select: none;
    color: var(--foreground);
    font-size: 13px;
    white-space: nowrap;
}

.tree-item:hover {
    background-color: var(--hover-background);
}

.tree-item.is-selected {
    background-color: var(--selection-background);
    color: var(--selection-foreground);
}

.tree-item .icon {
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.tree-element {
    /* Container for the actual DOM element of the item */
}

/* Indentation handling via padding-left usually calculated in JS or nested lists */
.tree-children {
    display: none;
    padding-left: 0;
    /* managed by nested hierarchy if we use ul/li */
}

.tree-children.is-expanded {
    display: block;
}

.tree-arrow {
    display: inline-block;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: rotate(0deg);
    transition: transform 0.1s ease;
    flex-shrink: 0;
}

.tree-arrow::before {
    content: '▶';
    font-size: 8px;
}

.is-expanded>.tree-content>.tree-arrow,
.tree-item[aria-expanded="true"] .tree-arrow {
    transform: rotate(90deg);
}