/* CloudBread 文档站：PC / 移动端共用样式 */

* {
    -webkit-tap-highlight-color: transparent;
    box-sizing: border-box;
}

html {
    /* 用 clip 而非 hidden：hidden 会把 overflow-y 计算为 auto 使 html 成为滚动容器，
       破坏后代 position:sticky 相对视口的定位；clip 只裁剪不建立滚动框，不影响 sticky */
    overflow-x: clip;
    -webkit-text-size-adjust: 100%;
}

body.doc-body {
    margin: 0;
    padding: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    /* clip 而非 hidden，原因同 html：避免破坏子元素 position:sticky */
    overflow-x: clip;
}

:root {
    --bg-main: #F9FAFB;
    --bg-main-rgb: 249, 250, 251;
    --card-bg: #FFFFFF;
    --text-main: #121212;
    --text-secondary: #6B7280;
    --border-color: #E5E5E5;
    --primary: #7C3AED;
    --header-h: 3.5rem;
    --doc-radius: 0.75rem;
}

.theme-dark {
    --bg-main: #121212;
    --bg-main-rgb: 18, 18, 18;
    --card-bg: #1E1E1E;
    --text-main: #FFFFFF;
    --text-secondary: #9CA3AF;
    --border-color: #1F2329;
}

.theme-card-bg { background-color: var(--card-bg) !important; }
.theme-bg-main { background-color: var(--bg-main) !important; }
.theme-text-main { color: var(--text-main) !important; }
.theme-text-secondary { color: var(--text-secondary) !important; }
.theme-border { border-color: var(--border-color) !important; }

/* ---------- 顶栏 ---------- */
.doc-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: color-mix(in srgb, var(--card-bg) 88%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding-top: env(safe-area-inset-top, 0);
}

.doc-header-inner {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1rem;
    min-height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.doc-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
    text-decoration: none;
    min-width: 0;
    flex-shrink: 1;
}

.doc-brand-title {
    font-weight: 700;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-header-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.doc-header-actions .topbar-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    min-height: 2.25rem;
    padding: 0 0.4rem;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s, background 0.2s;
}

.doc-header-actions .topbar-link:hover,
.doc-header-actions .topbar-link:active {
    color: var(--primary);
    background: rgba(124, 58, 237, 0.1);
}

.header-icon-btn {
    width: 2.25rem;
    height: 2.25rem;
    border: 0;
    border-radius: 0.5rem;
    background: transparent;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.95rem;
}

.header-icon-btn:hover,
.header-icon-btn:active {
    color: var(--primary);
    background: rgba(124, 58, 237, 0.1);
}

.theme-toggle-btn {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 0;
    background: transparent;
    color: var(--text-secondary);
}

.theme-toggle-btn:hover {
    background: rgba(124, 58, 237, 0.12);
}

/* ---------- 主体栅格 ---------- */
.doc-shell {
    flex: 1;
    width: 100%;
    max-width: 80rem;
    margin: 0 auto;
    padding: 1rem 1rem 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    min-width: 0;
}

.doc-aside,
.doc-toc-aside {
    display: none;
}

.doc-aside-card,
.doc-toc-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--doc-radius);
    padding: 0.75rem;
}

.doc-aside-card {
    position: sticky;
    top: calc(var(--header-h) + env(safe-area-inset-top, 0px) + 0.75rem);
    max-height: calc(100dvh - var(--header-h) - env(safe-area-inset-top, 0px) - 1.5rem);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.doc-aside-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(124, 58, 237, 0.35) transparent;
}

.doc-aside-scroll::-webkit-scrollbar { width: 6px; }
.doc-aside-scroll::-webkit-scrollbar-thumb {
    background: rgba(124, 58, 237, 0.35);
    border-radius: 99px;
}

.doc-main { min-width: 0; }

.nav-tree-item {
    display: flex;
    align-items: center;
    padding: 0.45rem 0.6rem;
    border-radius: 0.4rem;
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s;
    min-height: 2.1rem;
}

.nav-tree-item:hover { background: rgba(124, 58, 237, 0.08); color: var(--text-main); }
.nav-tree-item.active { background: rgba(124, 58, 237, 0.14); color: var(--primary); font-weight: 500; }
.nav-tree-children {
    margin-left: 0.7rem;
    border-left: 1px dashed var(--border-color);
    padding-left: 0.25rem;
}
.nav-tree-children.collapsed { display: none; }
.nav-tree-caret {
    flex: 0 0 12px;
    width: 12px;
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.15s;
}
.nav-tree-caret:hover { color: var(--primary); }
.nav-tree-caret.empty { visibility: hidden; cursor: default; }

.doc-hero {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--doc-radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.doc-search {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
}

.doc-search input {
    flex: 1;
    min-width: 0;
    padding: 0.6rem 0.85rem;
    border-radius: 0.6rem;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-main);
    font-size: 1rem;
}

.doc-search input:focus {
    outline: none;
    border-color: var(--primary);
}

.doc-search button {
    flex-shrink: 0;
    padding: 0 1rem;
    background: var(--primary);
    color: #fff;
    border: 0;
    border-radius: 0.6rem;
    cursor: pointer;
    min-width: 2.75rem;
}

.doc-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.6rem;
    overflow: hidden;
    display: block;
    text-decoration: none;
    color: inherit;
}

.doc-card img,
.doc-card .placeholder-cover {
    width: 100%;
    height: 132px;
    object-fit: cover;
    background: rgba(124, 58, 237, 0.08);
}

.doc-card .placeholder-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 2rem;
}

.doc-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.85rem;
}

/* ---------- 正文 ---------- */
.doc-article {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--doc-radius);
    padding: 1.1rem 1rem 1.25rem;
}

.doc-cover {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 0.6rem;
    margin-bottom: 1rem;
}

.prose-doc {
    color: var(--text-main);
    line-height: 1.75;
    font-size: 0.95rem;
    word-wrap: break-word;
    overflow-wrap: anywhere;
}

.prose-doc h1 { font-size: 1.45rem; font-weight: 700; margin: 1.1rem 0 0.5rem; line-height: 1.3; }
.prose-doc h2 { font-size: 1.2rem; font-weight: 700; margin: 1rem 0 0.45rem; line-height: 1.35; padding-bottom: 0.3rem; border-bottom: 1px solid var(--border-color); }
.prose-doc h3 { font-size: 1.05rem; font-weight: 600; margin: 0.85rem 0 0.35rem; }
.prose-doc h4 { font-size: 0.98rem; font-weight: 600; margin: 0.75rem 0 0.3rem; }
.prose-doc p { margin: 0.55rem 0; }
.prose-doc ul { list-style: disc; margin: 0.55rem 0; padding-left: 1.4rem; }
.prose-doc ol { list-style: decimal; margin: 0.55rem 0; padding-left: 1.4rem; }
.prose-doc li { margin: 0.18rem 0; }
.prose-doc code {
    background: rgba(124, 58, 237, 0.12);
    color: var(--primary);
    padding: 0.1rem 0.35rem;
    border-radius: 0.25rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.85em;
    word-break: break-word;
}
.prose-doc pre {
    background: rgba(0, 0, 0, 0.05);
    padding: 0.85rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0.75rem 0;
    max-width: 100%;
}
.theme-dark .prose-doc pre { background: rgba(255, 255, 255, 0.06); }
.prose-doc pre code { background: transparent; padding: 0; color: var(--text-main); font-size: 0.82rem; word-break: normal; overflow-wrap: normal; }
.prose-doc blockquote {
    border-left: 4px solid var(--primary);
    padding: 0.3rem 0 0.3rem 0.9rem;
    color: var(--text-secondary);
    margin: 0.75rem 0;
    background: rgba(124, 58, 237, 0.04);
    border-radius: 0 0.4rem 0.4rem 0;
}
.prose-doc img,
.prose-doc video,
.prose-doc iframe {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    margin: 0.55rem 0;
}
.prose-doc iframe { width: 100%; border: 0; aspect-ratio: 16 / 9; }
.prose-doc .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0.75rem 0;
    max-width: 100%;
}
.prose-doc table {
    border-collapse: collapse;
    width: 100%;
    min-width: 28rem;
}
.prose-doc th,
.prose-doc td {
    border: 1px solid var(--border-color);
    padding: 0.45rem 0.6rem;
    text-align: left;
}
.prose-doc th { background: rgba(124, 58, 237, 0.06); font-weight: 600; }
.prose-doc a { color: var(--primary); text-decoration: underline; }
.prose-doc hr { border: 0; border-top: 1px solid var(--border-color); margin: 1.25rem 0; }
.prose-doc .mermaid { text-align: center; margin: 0.75rem 0; overflow-x: auto; }

.doc-toc { font-size: 0.8rem; color: var(--text-secondary); }
.doc-toc a { color: var(--text-secondary); display: block; padding: 0.2rem 0; text-decoration: none; }
.doc-toc a:hover { color: var(--primary); }

.doc-pager {
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.doc-pager a {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.6rem;
    padding: 0.75rem;
    display: block;
    text-decoration: none;
}

.doc-pager a:hover { border-color: var(--primary); }

/* ---------- 页脚（对齐商城底部条） ---------- */
.doc-footer {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-bottom, 0px));
    background: color-mix(in srgb, var(--bg-main) 92%, transparent);
}

.doc-footer-inner {
    max-width: 80rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
}

.doc-footer-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: inherit;
}

.doc-footer-author img {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 9999px;
    object-fit: cover;
    border: 1px solid rgba(124, 58, 237, 0.5);
}

.doc-footer-name {
    margin: 0;
    font-weight: 500;
    color: var(--text-main);
    line-height: 1.2;
}

.doc-footer-mail {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    line-height: 1.2;
}

.doc-footer-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.35rem 1rem;
}

.doc-footer-meta p { margin: 0; }
.doc-footer-meta a { color: var(--primary); text-decoration: none; }

/* ---------- 抽屉 ---------- */
.doc-drawer { position: fixed; inset: 0; z-index: 50; }
.doc-drawer.hidden { display: none; }
.doc-drawer-mask { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.5); }
.doc-drawer-panel {
    position: absolute;
    top: 0;
    bottom: 0;
    width: min(20rem, 86vw);
    background: var(--card-bg);
    display: flex;
    flex-direction: column;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
}
.doc-drawer-panel.left { left: 0; border-right: 1px solid var(--border-color); }
.doc-drawer-panel.right { right: 0; border-left: 1px solid var(--border-color); }
.doc-drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.doc-drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
    -webkit-overflow-scrolling: touch;
}

.lg-only { display: none; }

@media (min-width: 640px) {
    .doc-header-inner { padding: 0 1.5rem; }
    .doc-shell { padding: 1.5rem 1.5rem 2.5rem; gap: 1.25rem; }
    .doc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .doc-hero { padding: 1.75rem 2rem; }
    .doc-article { padding: 1.75rem 2rem; }
    .doc-cover { height: 16rem; }
    .doc-card img,
    .doc-card .placeholder-cover { height: 150px; }
    .doc-pager { grid-template-columns: 1fr 1fr; }
    .prose-doc h1 { font-size: 1.7rem; }
    .prose-doc h2 { font-size: 1.35rem; }
    .doc-footer-inner {
        flex-direction: row;
        text-align: left;
        padding: 0 0.5rem;
    }
    .doc-footer-meta { justify-content: flex-end; }
}

@media (min-width: 1024px) {
    .sm-only { display: none !important; }
    .lg-only { display: inline-flex; }
    .doc-shell {
        grid-template-columns: 220px minmax(0, 1fr);
        gap: 1.25rem;
    }
    .doc-shell.has-toc {
        grid-template-columns: 200px minmax(0, 1fr) 168px;
    }
    .doc-aside { display: block; }
    .doc-toc-aside { display: block; }
    .doc-toc-card {
        position: sticky;
        top: calc(var(--header-h) + env(safe-area-inset-top, 0px) + 0.75rem);
        max-height: calc(100dvh - var(--header-h) - env(safe-area-inset-top, 0px) - 1.5rem);
        overflow-y: auto;
        scrollbar-width: thin;
    }
    .doc-card:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
        transition: transform 0.2s, box-shadow 0.2s;
    }
}

@media (min-width: 1280px) {
    .doc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .doc-shell {
        grid-template-columns: 240px minmax(0, 1fr);
        gap: 1.5rem;
    }
    .doc-shell.has-toc {
        grid-template-columns: 230px minmax(0, 1fr) 200px;
    }
}

@media (hover: none) {
    .doc-card:hover { transform: none; box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}