/* CSS变量：宽度、把手宽高、主色 */
:root {
    --nav-drawer-w: 300px;
    --nav-drawer-handle-w: 28px;
    --nav-drawer-handle-h: 64px;
    --nav-drawer-accent: #4636ff;
}

/* ─────────────────────────────────────────────
   Nav Drawer Toggle (Mobile)
   ───────────────────────────────────────────── */
/* 抽屉按钮：移动端（悬浮） */
.nav-drawer-toggle {
    position: fixed;
    right: 50px;
    bottom: 210px;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    font-size: 15px;
    padding: 0;
    border: 1px solid var(--nav-drawer-accent);
    background: var(--nav-drawer-accent);
    color: #fff;
    cursor: pointer;
    z-index: 1001; /* 低于站点 header（若 header 很高 z-index） */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 22px rgba(0, 0, 0, .22);
    transition: transform .32s ease, opacity .32s ease, box-shadow .32s ease;
}


.nav-drawer-toggle i {
    display: inline-block;
}

/* ─────────────────────────────────────────────
   Nav Drawer Core (Container, Open State)
   ───────────────────────────────────────────── */
/* 抽屉本体 */
.nav-drawer {
    position: fixed;
    top: 0;
    width: var(--nav-drawer-w);
    max-width: 300px;
    height: 100vh;
    backdrop-filter: blur(10px);
    border-right: 1px solid rgba(255, 255, 255, .08);
    color: var(--text-color);
    background: var(--bg-color);
    z-index: 1002;
    transform: translateX(-105%);
    transition: transform .32s ease, box-shadow .32s ease;
    display: flex;
    flex-direction: column;
}

.nav-drawer.is-open {
    transform: translateX(0);
    border-right: 2px solid #4636ff;
    box-shadow: 6px 0 24px rgba(70, 54, 255, .28);
}

/* ─────────────────────────────────────────────
   Nav Drawer Header / Body / Close
   ───────────────────────────────────────────── */
/* 头部 */
.nav-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 134px 10px 24px 16px;
    border-bottom: 1px solid #ddd;
}

.nav-drawer__title {
    font-size: 26px;
    font-weight: 600;
}

.nav-drawer__close {
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 10px;
    background: rgba(255, 255, 255, .10);
    color: #fff;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
}

/* 内容 */
.nav-drawer__body {
    padding: 14px 16px 22px;
    overflow-y: auto;
    overscroll-behavior: contain;
    flex: 1;
}

/* ─────────────────────────────────────────────
   Backdrop
   ───────────────────────────────────────────── */
/* 遮罩 */
.nav-drawer-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .4);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity .18s ease;
}

.nav-drawer-backdrop.is-open {
    opacity: 1;
    pointer-events: auto;
}

/* ─────────────────────────────────────────────
   Desktop Media Query (>=993px)
   ───────────────────────────────────────────── */
@media (min-width: 993px) {
    /* 桌面端禁用遮罩 */
    .nav-drawer-backdrop {
        display: none !important;
    }

    /* 桌面端隐藏关闭按钮 */
    .nav-drawer__close {
        display: none !important;
    }

    /* 桌面端：左侧居中把手（跟随抽屉边缘移动） */
    .nav-drawer-toggle {
        left: 0;
        top: 50%;
        bottom: auto;
        width: var(--nav-drawer-handle-w);
        height: var(--nav-drawer-handle-h);
        border-radius: 0 14px 14px 0;
        /*border: 1px solid rgba(255, 255, 255, .14);*/
        background: #4636ff;
        transform: translateY(-50%);
        box-shadow: 2px 0 14px rgba(0, 0, 0, .28);
        z-index: 9001;
        transition: left .22s ease, transform .18s ease, box-shadow .18s ease;
    }

    /* 打开时把手跟随抽屉宽度滑到右侧边缘 */
    .nav-drawer-toggle[aria-expanded="true"] {
        left: 300px;
    }

    /* 桌面端用箭头，不用 bars */
    .nav-drawer-toggle i {
        display: none;
    }

    .nav-drawer-toggle::before {
        content: "❯";
        font-size: 18px;
        line-height: 1;
        display: inline-block;
        transition: transform .18s ease;
        transform: rotate(0deg);
        color: #fff;
        opacity: .92;
    }

    /* 抽屉打开时箭头反向，含义变为“收起” */
    .nav-drawer-toggle[aria-expanded="true"]::before {
        transform: rotate(180deg);
    }
}

/* ─────────────────────────────────────────────
   Nav Tree (hierarchical)
   ───────────────────────────────────────────── */
.nav-tree {
    font-size: 14px;
    line-height: 1.45;
}

.nav-tree__top {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 10px 12px;
    margin: 0 0 10px;
    /*border-radius: 12px;*/
    background: rgba(70, 54, 255, 0.06);
    border: 1px solid rgba(70, 54, 255, 0.18);
}

.nav-tree__home {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--nav-drawer-accent);
    font-weight: 600;
    text-decoration: none;
    padding: 6px 8px;
    /*border-radius: 10px;*/
}

.nav-tree__home:hover {
    background: rgba(70, 54, 255, 0.10);
}

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

/* 子层级缩进 */
.nav-tree__item .nav-tree__list {
    margin-left: 14px;
    padding-left: 10px;

}

.nav-tree__item .nav-tree__list::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    border-left: 1px dashed rgba(0, 0, 0, 0.25);
}

/* 单行容器 */
.nav-tree__row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    /*border-radius: 10px;*/
    user-select: none;
}

.nav-tree__row:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* 文件夹按钮 */
.nav-tree__toggle {
    width: 22px;
    height: 22px;
    min-width: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    /*border-radius: 8px;*/
    background: rgba(0, 0, 0, 0.06);
    color: inherit;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.nav-tree__toggle:hover {
    background: rgba(0, 0, 0, 0.10);
}

.nav-tree__toggle:focus-visible {
    outline: 2px solid rgba(70, 54, 255, 0.45);
    outline-offset: 2px;
}

/* 文件夹标题 */
.nav-tree__label {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    opacity: 0.95;
}

/* 叶子链接 */
.nav-tree__link {
    display: block;
    padding: 6px 10px;
    /*border-radius: 10px;*/
    color: var(--text-color);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-tree__link:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* 当前文章高亮 */
.nav-tree__link.is-current {
    background: rgba(70, 54, 255, 0.12);
    border: 1px solid rgba(70, 54, 255, 0.28);
    color: var(--nav-drawer-accent);
    font-weight: 600;
}

/* 未公开/隐藏（如果你保留了） */
.nav-tree__link.is-hidden {
    opacity: 0.55;
    pointer-events: none;
}

/* 文件夹状态 */
.nav-tree__item.is-folder > .nav-tree__row .nav-tree__toggle {
    background: rgba(0, 0, 0, 0.05);
}

.nav-tree__item.is-folder.is-open > .nav-tree__row {
    background: rgba(0, 0, 0, 0.035);
}

/* ─────────────────────────────────────────────
   Nav Drawer Toolbar + Scope Toggle
   ───────────────────────────────────────────── */
.nav-drawer__toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    margin: 0 0 10px;
    background: rgba(70, 54, 255, 0.06);
    border: 1px solid rgba(70, 54, 255, 0.18);
}

.nav-cluster-home {
    display: inline-flex;
    align-items: center;
    max-width: 60%;
    padding: 6px 10px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    color: var(--nav-drawer-accent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-scope-toggle__text {
    color: var(--nav-drawer-accent);
}

.nav-scope-toggle {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    /*border-radius: 999px;*/
    border: 1px solid rgba(0, 0, 0, 0.14);
    background: rgba(0, 0, 0, 0.04);
    color: rgba(0, 0, 0, 0.78);
    cursor: pointer;
    font-size: 12px;
    line-height: 1;
    user-select: none;
    transition: background .15s ease, border-color .15s ease, color .15s ease;
}

.nav-scope-toggle__dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.22);
    transition: background .15s ease, box-shadow .15s ease;
}

.nav-scope-toggle:focus-visible {
    outline: 2px solid rgba(70, 54, 255, 0.45);
    outline-offset: 2px;
}

/* 激活态：全站 */
.nav-scope-toggle[aria-pressed="true"] {
    border-color: rgba(70, 54, 255, 0.35);
    background: rgba(70, 54, 255, 0.12);
    color: var(--nav-drawer-accent);
}

.nav-scope-toggle[aria-pressed="true"] .nav-scope-toggle__dot {
    background: var(--nav-drawer-accent);
    box-shadow: 0 0 0 3px rgba(70, 54, 255, 0.18);
}

/* ─────────────────────────────────────────────
   Forced Folder Connector Lines
   ───────────────────────────────────────────── */
/* 强制恢复层级虚线：只对文件夹的直接子列表生效 */
.nav-tree__item.is-folder {
    position: relative;
}

/* 直接子列表：缩进 + 留出画线空间 */
.nav-tree__item.is-folder > ul {
    position: relative;
    margin-left: 14px !important;
    padding-left: 12px !important;
}

/* 画竖向虚线（不依赖 border-left，避免被重置） */
.nav-tree__item.is-folder > ul::before {
    content: "";
    position: absolute;
    left: 4px;                 /* 虚线在 padding-left 内 */
    top: 0;
    bottom: 0;
    width: 1px;
    background-image: repeating-linear-gradient(
            to bottom,
            rgba(0,0,0,0.28) 0 4px,
            rgba(0,0,0,0) 4px 9px
    );
    pointer-events: none;
}

/* 画横向小连线（每个子项一段），更像文件管理器 */
.nav-tree__item.is-folder > ul > li {
    position: relative;
}

.nav-tree__item.is-folder > ul > li::before {
    content: "";
    position: absolute;
    left: -8px;
    top: 18px;                 /* 对齐到一行中部，可按你行高微调 */
    width: 10px;
    height: 1px;
    background-image: repeating-linear-gradient(
            to right,
            rgba(0,0,0,0.28) 0 4px,
            rgba(0,0,0,0) 4px 9px
    );
    pointer-events: none;
}

/* ─────────────────────────────────────────────
   Dark Mode Overrides
   ───────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
    .nav-tree__item > .nav-tree__list {
        border-left-color: rgba(255, 255, 255, 0.16);
    }

    .nav-tree__row:hover,
    .nav-tree__link:hover {
        background: rgba(0,0,0, 0.035);
        transition: color .18s ease;
    }

    .nav-tree__toggle {
        background: rgba(255, 255, 255, 0.10);
    }

    .nav-tree__toggle:hover {
        background: rgba(255, 255, 255, 0.14);
    }

    .nav-scope-toggle {
        border-color: rgba(255, 255, 255, 0.18);
        background: rgba(255, 255, 255, 0.06);
        color: rgba(255, 255, 255, 0.80);
    }

    .nav-scope-toggle__dot {
        background: rgba(255, 0, 0, 0.35);
    }

    .nav-scope-toggle[aria-pressed="true"] {
        border-color: rgba(70, 54, 255, 0.45);
        background: rgba(70, 54, 255, 0.18);
        color: #cfd2ff;
    }

    .nav-tree__item.is-folder > ul::before {
        background-image: repeating-linear-gradient(
                to bottom,
                rgba(255,255,255,0.22) 0 4px,
                rgba(255,255,255,0) 4px 9px
        );
    }

    .nav-tree__item.is-folder > ul > li::before {
        background-image: repeating-linear-gradient(
                to right,
                rgba(255,255,255,0.22) 0 4px,
                rgba(255,255,255,0) 4px 9px
        );
    }
}

/* ─────────────────────────────────────────────
   Scrollbar Tweaks
   ───────────────────────────────────────────── */
/* 滚动条观感（可选）：仅 drawer 内 body 生效 */
.nav-drawer__body::-webkit-scrollbar {
    display: none;
}