/* 树容器 */
.bim-tree {
    width: 100%;
    overflow: auto;
    font-size: 14px;
    color: var(--bim-ui_text_primary, #333);
    user-select: none; /* 防止双击选中文字 */
}

/* 节点行容器 */
.bim-tree-node {
    display: flex;
    flex-direction: column;
}

/* 节点内容行 (Flex 布局) */
.bim-tree-node-content {
    display: flex;
    align-items: center;
    height: 32px; /* 标准行高 */
    cursor: pointer;
    transition: background-color 0.2s;
    border-radius: 4px;
    padding-right: 8px;
}

.bim-tree-node-content:hover {
    background-color: var(--bim-ui_bg_hover, rgba(0, 0, 0, 0.05));
}

/* 展开/折叠箭头 */
.bim-tree-switcher {
    width: 24px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--bim-ui_text_secondary, #999);
    transition: transform 0.2s;
    flex-shrink: 0;
}

.bim-tree-switcher svg {
    width: 12px;
    height: 12px;
    fill: currentColor;
    transition: transform 0.2s;
}

.bim-tree-switcher.is-expanded svg {
    transform: rotate(90deg);
}

.bim-tree-switcher.is-hidden {
    visibility: hidden; /*叶子节点占位但不显示*/
}

/* 复选框 */
.bim-tree-checkbox {
    width: 16px;
    height: 16px;
    border: 1px solid var(--bim-ui_border_color, #d9d9d9);
    border-radius: 2px;
    margin-right: 8px;
    background-color: var(--bim-ui_bg_color, #fff);
    position: relative;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.2s;
}

.bim-tree-checkbox:hover {
    border-color: var(--bim-primary_color, #1890ff);
}

/* 选中状态 */
.bim-tree-checkbox.is-checked {
    background-color: var(--bim-primary_color, #1890ff);
    border-color: var(--bim-primary_color, #1890ff);
}

.bim-tree-checkbox.is-checked::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 4px;
    width: 5px;
    height: 9px;
    border: 2px solid #fff;
    border-top: 0;
    border-left: 0;
    transform: rotate(45deg);
}

/* 半选状态 */
.bim-tree-checkbox.is-indeterminate {
    background-color: var(--bim-ui_bg_color, #fff);
    border-color: var(--bim-primary_color, #1890ff);
}

.bim-tree-checkbox.is-indeterminate::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 3px;
    width: 8px;
    height: 2px;
    background-color: var(--bim-primary_color, #1890ff);
}

/* 禁用状态 */
.bim-tree-node.is-disabled .bim-tree-checkbox {
    background-color: #f5f5f5;
    border-color: #d9d9d9;
    cursor: not-allowed;
}

.bim-tree-node.is-disabled .bim-tree-checkbox.is-checked {
    background-color: #d9d9d9; 
}

.bim-tree-node.is-disabled .bim-tree-node-content {
    color: var(--bim-ui_text_disabled, #ccc);
    cursor: not-allowed;
}

/* 图标 */
.bim-tree-icon {
    width: 16px;
    height: 16px;
    margin-right: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.bim-tree-icon img,
.bim-tree-icon svg {
    width: 100%;
    height: 100%;
}

/* 文本 */
.bim-tree-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 子节点容器 */
.bim-tree-children {
    display: none;
    overflow: hidden;
}

.bim-tree-children.is-visible {
    display: block;
}