/**
 * 侧边目录导航 - 公共样式
 * 供 CHARLS / ELSA / NHANES / CRELES / Harmonized 等数据页面共用
 * 各页面的布局与定位覆盖见对应 *_table.css 中的「目录 布局和定位」块
 */

/* ================= */
/* 侧边导航和目录 */
/* ================= */

/* 目录面板：从顶栏下方开始，高度不溢出视口 */
/* 重复类名提高优先级，覆盖各 *_table.css 中的 body[data-page] .side-nav 规则 */
html body .side-nav.side-nav {
    top: 64px;
    height: calc(100vh - 64px);
    border-radius: 0 12px 12px 0;
    overflow: visible; /* 允许 .nav-toggle 伸出不被裁切，圆角裁切改由 .nav-content 负责 */
}

/* 侧边目录底色（公共） */
.side-nav {
    --side-nav-white-alpha: 0;
    --side-nav-overlay-alpha: 0; /* 全站统一深色遮罩强度 */

    background:
        linear-gradient(
            rgba(0, 0, 0, var(--side-nav-overlay-alpha)),
            rgba(0, 0, 0, var(--side-nav-overlay-alpha))
        ),
        rgba(255, 255, 255, var(--side-nav-white-alpha));
}

/* 切换按钮（用选择器优先级保证不被页面透明规则覆盖） */
/* 收起时：保持黄色 #FFD016 */
body .side-nav .nav-toggle {
    position: absolute;
    left: 100%;   /* 左缘贴齐面板右缘，不重叠 */
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 40px;
    background: #FFD016;
    border-radius: 0 4px 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #000;
    font-size: 12px;
    z-index: 9999;  /* 确保切换按钮在最前面 */
}
/* 展开时：底色、边框与 nav-search 对齐 */
body .side-nav.active .nav-toggle {
    background: rgba(0, 0, 0, 0.15);
    color: #E8E5E0;
    border: 1px solid rgba(167, 167, 167, 0.4);
    border-left: none;
}

/* 导航内容 - 固定头部，仅目录树滚动；此处裁切以保留圆角效果 */
body .side-nav .nav-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 0 12px 12px 0; /* 与 .side-nav 一致，裁切内容以显示圆角 */
    background: transparent;
    background-color: transparent;
    padding: 20px 0 0;
    position: relative;
    z-index: 9999;
    box-sizing: border-box;
}

/* 导航头部 - 固定高度，不随搜索框输入变化；下框线从中间透明向两端渐变 */
.nav-header {
    flex-shrink: 0;
    height: 44px; /* 固定总高（含下内边距），避免输入时高度变化 */
    padding: 0 24px 20px;
    background: transparent;
    margin-bottom: 0px;
    position: relative;
    box-sizing: border-box; /* 高度含 padding，内容区约 24px 单行 */
}
.nav-header::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        var(--text-color) 0%,
        transparent 30%,
        transparent 70%,
        var(--text-color) 100%
    );
}

.nav-header-content {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 24px; /* 锁定单行高度，防止搜索框输入时撑高 */
    min-height: 24px;
}

/* 目录标题：在标题与展开按钮之间为搜索框；文字垂直居中 */
.nav-title {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

.nav-search-wrap {
    flex: 1;
    min-width: 0;
    position: relative;
}
/* 搜索图标（伪元素，与输入内容同对齐底部；悬停时放大） */
.nav-search-wrap::before {
    content: '';
    position: absolute;
    left: 10px;
    bottom: 3px;
    top: auto;
    width: 10px;
    height: 10px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E") no-repeat center;
    background-size: 10px;
    pointer-events: none;
    transition: transform 0.2s;
    transform-origin: left bottom;
}
.nav-search-wrap:hover::before {
    transform: scale(1.25);
}

/* 展开按钮 - 无底色无边框；悬停仅图标放大 */
.nav-expand-btn {
    flex-shrink: 0;
    width: 24;
    height: 24px;
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
    color: #E8E5E0;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.nav-expand-btn i {
    font-size: 10px;
    transition: transform 0.2s;
}
.nav-expand-btn:hover i {
    transform: scale(1.25);
}

/* 目录搜索框（在标题与展开按钮之间）；无底色无边框；悬停仅搜索图标变大 */
.nav-search-input {
    width: 100%;
    height: 24px;
    max-height: 24px;
    box-sizing: border-box;
    padding: 0 8px 0 24px;
    padding-top: calc(24px - 1.2em);
    padding-bottom: 0;
    border: none;
    border-radius: 0;
    font-size: 11px;
    line-height: 1.2;
    color: var(--text-color);
    background: transparent;
    outline: none;
    overflow: hidden; /* 防止长文本或浏览器行为导致高度变化 */
}
.nav-search-input::placeholder {
    color: rgba(167, 167, 167, 0.8);
}

/* 目录树 - 可滚动区域 */
.nav-tree {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 2px 24px 24px;
}

/* 目录项基础样式 */
.nav-item {
    margin-bottom: 2px;
}
.nav-item.nav-item-hidden {
    display: none !important;
}

/* 所有目录项标题统一设置，确保文字对齐；预留 1px 边框避免悬停时占位变化 */
.nav-item-title {
    position: relative;
    padding-left: 20px; /* 为图标预留空间，所有项统一 */
    display: flex;
    align-items: flex-start; /* 改为顶部对齐，让图标对齐第一行文字 */
    cursor: pointer;
    color: var(--text-color);
    border-bottom: 1px solid transparent;
}
/* 悬停：底色与顶部导航栏悬停一致 rgba(0,0,0,0.08)，底框线渐变，各级目录统一圆角 */
.nav-item-title:hover {
    background-color: rgba(0, 0, 0, 0.15);
    background-image: linear-gradient(
        90deg,
        transparent 0%,
        var(--text-color) 10%,
        transparent 100%
    );
    background-size: 100% 1px;
    background-position: bottom;
    background-repeat: no-repeat;
    border-radius: 6px;
}

.nav-item.parent-item.expanded > .nav-item-title {
    background: rgba(0, 0, 0, 0.15) ;
    background-image: linear-gradient(
        90deg,
        transparent 0%,
        var(--text-color) 10%,
        transparent 100%
    );
    background-size: 100% 1px;
    background-position: bottom;
    background-repeat: no-repeat;
    border-radius: 6px;
}

/* 末级目录选中状态 - 与展开状态效果一致 */
.nav-item.leaf-item.selected > .nav-item-title {
    background: rgba(0, 0, 0, 0.15) ;
    background-image: linear-gradient(
        90deg,
        transparent 0%,
        var(--text-color) 10%,
        transparent 100%
    );
    background-size: 100% 1px;
    background-position: bottom;
    background-repeat: no-repeat;
    border-radius: 6px;
}

/* 图标样式 - 绝对定位，对齐第一行文字 */
.nav-item-title i {
    position: absolute;
    left: 0;
    top: 0; /* 对齐第一行文字 */
    font-size: 12px;
    color: var(--ant-color-icon-color);
    transition: all 0.2s;
    width: 16px; /* 固定图标宽度 */
    text-align: center;
    display: inline-block;
    line-height: 1.5; /* 与文字行高保持一致 */
}

/* 文字部分 */
.nav-item-title span {
    display: inline-block;
    flex: 1;
}

/* 所有目录项都可以搜索（点击态统一） */
.nav-item .nav-item-title {
    cursor: pointer;
    position: relative;
    color: var(--text-color);
}

.nav-item .nav-item-title:hover {
    color: var(--text-color);
}

/* 有子目录的项的箭头图标单独处理 */
.nav-item.parent-item .nav-item-title i {
    cursor: pointer;
}

.nav-item.parent-item .nav-item-title i:hover {
    color: var(--ant-color-icon-color);
    transform: scale(1.1);
}

/* 确保末级目录不会有展开效果 */
.nav-item.leaf-item .nav-children {
    display: none;
}

.nav-item.leaf-item.expanded .nav-children {
    display: none;
}

.nav-item.parent-item.expanded > .nav-item-title i {
    transform: rotate(90deg);
    color: var(--ant-color-icon-color);
}

/* 一级目录样式 - 大字体 */
.nav-title-level-1 {
    font-size: 14px;
    font-weight: 600;
    padding: 8px 4px 8px 20px; /* 保持padding-left为20px */
}

/* 一级目录图标对齐第一行 */
.nav-title-level-1 i {
    top: 10px; /* 对齐第一行文字，增加一点上边距 */
}

/* 其他级别目录样式 - 普通字体（支持 2～6 级，CHARLS/ELSA 等有多级） */
.nav-title-level-2,
.nav-title-level-3,
.nav-title-level-4,
.nav-title-level-5,
.nav-title-level-6 {
    font-size: 14px;
    font-weight: 400;
    padding: 4px 4px 4px 20px; /* 保持padding-left为20px */
}

/* 其他级别图标对齐第一行 */
.nav-title-level-2 i,
.nav-title-level-3 i,
.nav-title-level-4 i,
.nav-title-level-5 i,
.nav-title-level-6 i {
    top: 6px; /* 对齐第一行文字，增加一点上边距 */
}

.nav-children {
    margin: 2px 0 2px 24px;  /* 增加缩进 */
    display: none;
    padding-left: 8px;  /* 增加树线和展开项之间的间距 */
    position: relative;
}
/* 垂线：中间实色、向两端透明渐变 */
.nav-children::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(
        180deg,
        transparent 0%,
        var(--text-color) 30%,
        var(--text-color) 70%,
        transparent 100%
    );
}

/* 只对有子目录的项显示展开效果 */
.nav-item.parent-item.expanded > .nav-children {
    display: block;
}

/* 目录树滚动条 - 覆盖各页全局 scrollbar，故此处用 !important */
body .side-nav .nav-tree::-webkit-scrollbar {
    width: 6px !important;
}

body .side-nav .nav-tree::-webkit-scrollbar-thumb {
    background: #121212 !important;
    border-radius: 3px !important;
}

body .side-nav .nav-tree::-webkit-scrollbar-track {
    background: transparent !important;
}

body .side-nav .nav-tree::-webkit-scrollbar-thumb:hover {
    background: #121212 !important;
}

/* 白天模式：目录字体颜色 */
[data-theme="light"] .side-nav .nav-item-title,
[data-theme="light"] .side-nav .nav-item .nav-item-title,
[data-theme="light"] .side-nav .nav-expand-btn {
    color: #121212;
}

[data-theme="light"] .side-nav .nav-header::after {
    background: linear-gradient(
        90deg,
        #121212 0%,
        transparent 100%
    );
}

[data-theme="light"] .side-nav .nav-item-title:hover {
    background-color: rgba(0, 0, 0, 0.08);
    background-image: linear-gradient(
        90deg,
        transparent 0%,
        #121212 10%,
        transparent 100%
    );
    background-size: 100% 1px;
    background-position: bottom;
    background-repeat: no-repeat;
}
[data-theme="light"] .side-nav .nav-item.parent-item.expanded > .nav-item-title,
[data-theme="light"] .side-nav .nav-item.leaf-item.selected > .nav-item-title {
    background: rgba(0, 0, 0, 0.08);
    background-image: linear-gradient(
        90deg,
        transparent 0%,
        #121212 10%,
        transparent 100%
    );
    background-size: 100% 1px;
    background-position: bottom;
    background-repeat: no-repeat;
}

[data-theme="light"] .side-nav .nav-search-input {
    color: #888888;
    background-color: transparent;
}
[data-theme="light"] .side-nav .nav-search-input::placeholder {
    color: #888888;
}
[data-theme="light"] .side-nav .nav-search-wrap::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
    background-size: 10px;
    transform-origin: left bottom;
}
[data-theme="light"] .side-nav .nav-search-wrap:hover::before {
    transform: scale(1.25);
}
[data-theme="light"] .side-nav .nav-expand-btn {

    color: #121212;
}
/* 白天模式：展开时 nav-toggle 底色、边框与 nav-search 对齐 */
[data-theme="light"] .side-nav.active .nav-toggle {
    background: rgba(0, 0, 0, 0.04);
    color: #121212;
    border-color: rgba(0, 0, 0, 0.12);
    border-left: none;
}

[data-theme="light"] .side-nav .nav-children::before {
    background: linear-gradient(
        180deg,
        transparent 0%,
        #121212 30%,
        #121212 70%,
        transparent 100%
    );
}

/* 黑夜模式：目录字体颜色（主题在 html 上，黑夜时无 data-theme 或非 light） */
html:not([data-theme="light"]) .nav-title,
html:not([data-theme="light"]) .side-nav .nav-item-title,
html:not([data-theme="light"]) .side-nav .nav-item .nav-item-title {
    color: #E8E5E0;
}


html:not([data-theme="light"]) .side-nav .nav-header::after {
    background: linear-gradient(
        90deg,
        #E8E5E0 0%,
        transparent 100%
    );
}

html:not([data-theme="light"]) .side-nav .nav-item-title:hover {
    background-image: linear-gradient(
        90deg,
        transparent 0%,
        #E8E5E0 10%,
        transparent 100%
    );
    background-size: 100% 1px;
    background-position: bottom;
    background-repeat: no-repeat;
}

html:not([data-theme="light"]) .side-nav .nav-children::before {
    background: linear-gradient(
        180deg,
        transparent 0%,
        #E8E5E0 30%,
        #E8E5E0 70%,
        transparent 100%
    );
}

/* 侧边目录拖拽边框：使用系统水平调整光标，识别范围缩小 */
body .side-nav .nav-resizer {
    width: 2px !important;
    cursor: ew-resize !important;
}