:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #e3e7ee;
  --text: #1f2329;
  --muted: #7a828e;
  --accent: #2f6fed;
  --accent-weak: #eaf0fe;
  --danger: #d83931;
  --radius: 8px;
  --sidebar-w: 280px;
  --toc-w: 220px;
  --shadow: 0 2px 10px rgba(20, 30, 50, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

/* hidden 属性必须生效（防止 #app/#login/#modal 的 display 声明把它覆盖，
   否则遮罩层会永远悬浮在页面上挡住操作） */
[hidden] { display: none !important; }

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  touch-action: manipulation;
  -webkit-font-smoothing: antialiased;
}

body.dragging::after {
  content: "松开以上传文件";
  position: fixed;
  inset: 12px;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--accent);
  background: rgba(47, 111, 237, 0.08);
  border: 2px dashed var(--accent);
  border-radius: 12px;
  pointer-events: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* ============ 布局 ============ */
#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 30;
}

.side-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 16px;
  font-weight: 700;
}

.tree {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

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

.tree-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px 7px 0;
  cursor: pointer;
  border-radius: 6px;
  margin: 1px 6px;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}

.tree-row:hover { background: var(--bg); }
.tree-row.active { background: var(--accent-weak); color: var(--accent); font-weight: 600; }

.caret {
  width: 16px;
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  flex-shrink: 0;
  transition: transform 0.12s;
}

.tree-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-empty {
  padding: 12px 20px;
  color: var(--muted);
  font-size: 13px;
}

.side-foot {
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.opt {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
}

.user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-name {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 角色徽标（管理员/游客） */
.role-chip {
  flex-shrink: 0;
  font-size: 11px;
  padding: 1px 8px;
  border-radius: 10px;
  background: var(--accent-weak);
  color: var(--accent);
  white-space: nowrap;
}

.role-chip.guest {
  background: #f0f2f5;
  color: var(--muted);
}

/* 用户管理弹窗 */
.users-card { width: min(480px, 100%); }

.users-card .hint-text {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 12px;
}

.users-list {
  max-height: 240px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 10px;
}

.user-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.user-item:last-child { border-bottom: none; }

.user-item-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

.users-create {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.users-create input {
  flex: 1;
  min-width: 130px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  outline: none;
}

.users-create input:focus { border-color: var(--accent); }

#main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ============ 顶栏 ============ */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  z-index: 20;
}

/* 电脑端：侧栏可收起（按钮在顶栏 ☰） */
@media (min-width: 900px) {
  #sidebar { transition: margin-left 0.22s ease; }

  body.sidebar-collapsed #sidebar {
    margin-left: calc(var(--sidebar-w) * -1);
  }
}

.breadcrumb {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.breadcrumb::-webkit-scrollbar { display: none; }

.crumb {
  color: var(--accent);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
}

.crumb:hover { background: var(--accent-weak); }

.crumb.current {
  color: var(--text);
  cursor: default;
  font-weight: 600;
}

.crumb-sep { color: var(--muted); }

.actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ============ 按钮 ============ */
.btn {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 13px;
  transition: opacity 0.15s, background 0.15s;
}

.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn.ghost {
  background: var(--panel);
  color: var(--text);
  border-color: var(--border);
}

.btn.ghost:hover { background: var(--bg); }

.btn.tiny { padding: 4px 10px; font-size: 12px; border-radius: 6px; }

.btn.danger {
  background: var(--danger);
  border-color: var(--danger);
}

.btn.danger.ghost {
  background: var(--panel);
  color: var(--danger);
  border-color: var(--danger);
}

.btn.danger.ghost:hover { background: #fdecea; }

.icon-btn {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 6px;
  line-height: 1;
}

.icon-btn:hover { background: var(--bg); color: var(--text); }

/* ============ 文件列表 ============ */
#content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.filelist {
  max-width: 960px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.file-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

.file-row:last-child { border-bottom: none; }

.file-row.clickable { cursor: pointer; }
.file-row.clickable:hover { background: #fafbfd; }

.f-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.f-name .up { color: var(--muted); }

.f-meta {
  flex-shrink: 0;
  color: var(--muted);
  font-size: 12px;
}

.f-actions {
  flex-shrink: 0;
  display: flex;
  gap: 6px;
  opacity: 0.35;
  transition: opacity 0.15s;
}

.file-row:hover .f-actions { opacity: 1; }

.empty {
  padding: 48px 20px;
  text-align: center;
  color: var(--muted);
}

/* ============ 预览 ============ */
.preview {
  max-width: 920px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  /* 注意：不能设 overflow:hidden，否则它会成为 sticky 的最近滚动容器，
     导致 .preview-bar 的吸顶失效（操作栏会跟着正文一起滚走） */
  overflow: visible;
}

.preview-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  /* 桌面宽屏：操作栏在文档流中随卡片滚动（v4 行为，不悬浮、不遮文）；
     吸顶与 下滑收起/上滑唤出 仅在窄屏阅读模式启用（见下方媒体查询） */
}

.preview-title {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-actions { display: flex; gap: 6px; }

.note-body {
  padding: 24px 32px 48px;
  line-height: 1.75;
  font-size: 15px;
  word-wrap: break-word;
}

.note-body .loading,
.note-body .error-text { color: var(--muted); }

/* Markdown 排版 */
.note-body h1, .note-body h2, .note-body h3,
.note-body h4, .note-body h5, .note-body h6 {
  margin: 1.4em 0 0.6em;
  line-height: 1.35;
  font-weight: 700;
}

.note-body h1 {
  font-size: 1.7em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
}

.note-body h2 {
  font-size: 1.4em;
  padding-bottom: 0.25em;
  border-bottom: 1px solid var(--border);
}

.note-body h3 { font-size: 1.2em; }
.note-body h4 { font-size: 1.05em; }

.note-body p { margin: 0.7em 0; }

.note-body a { color: var(--accent); text-decoration: none; }
.note-body a:hover { text-decoration: underline; }

.note-body mark {
  background: #fff3a3;
  padding: 0 3px;
  border-radius: 3px;
}

.img-broken {
  display: inline-block;
  max-width: 100%;
  border: 1px dashed #d0d5dd;
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 13px;
  background: var(--bg);
  word-break: break-all;
}

.img-broken code {
  font-family: var(--mono);
  background: none;
  padding: 0;
  color: var(--danger);
}

.note-body img {
  max-width: 100%;
  border-radius: 6px;
  margin: 0.5em 0;
}

.note-body blockquote {
  margin: 0.8em 0;
  padding: 0.2em 1em;
  border-left: 4px solid var(--accent);
  color: var(--muted);
  background: var(--bg);
  border-radius: 0 6px 6px 0;
}

.note-body code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: #f0f2f5;
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.note-body pre {
  background: #f6f8fa;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0.9em 0;
}

.note-body pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
}

.note-body ul, .note-body ol {
  padding-left: 1.6em;
  margin: 0.6em 0;
}

.note-body li { margin: 0.25em 0; }

.note-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5em 0;
}

.note-body table {
  border-collapse: collapse;
  margin: 0.8em 0;
}

.note-body th, .note-body td {
  border: 1px solid var(--border);
  padding: 7px 12px;
}

.note-body th {
  background: var(--bg);
  font-weight: 600;
}

.table-wrap { overflow-x: auto; }

.note-body .task-list-item { list-style: none; }

/* ============ 上传进度 ============ */
.progress {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 60;
  width: min(420px, calc(100vw - 32px));
}

.progress-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
}

.bar {
  height: 6px;
  background: var(--bg);
  border-radius: 3px;
  overflow: hidden;
}

#barFill {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.2s;
}

/* ============ 登录 ============ */
#login {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #eef3fd 0%, #f4f6f9 100%);
  z-index: 100;
  padding: 20px;
}

.login-card {
  width: 340px;
  max-width: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-card h1 {
  margin: 0;
  font-size: 24px;
  text-align: center;
}

.login-card .hint {
  margin: 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

.login-card input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
}

.login-card input:focus { border-color: var(--accent); }

.login-card .btn, .login-card button[type="submit"] {
  padding: 11px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
}

.login-card button:hover { opacity: 0.92; }

.login-card .error {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}

/* ============ Toast / Modal ============ */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(10px);
  background: rgba(31, 35, 41, 0.94);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 120;
  max-width: min(560px, calc(100vw - 32px));
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 20, 30, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 130;
  padding: 20px;
}

.modal-card {
  width: 380px;
  max-width: 100%;
  background: var(--panel);
  border-radius: 12px;
  padding: 22px 24px;
  box-shadow: var(--shadow);
}

.modal-card h3 { margin: 0 0 10px; font-size: 16px; }

.modal-text {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  word-break: break-all;
}

.modal-card input {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  margin-bottom: 8px;
}

.modal-card input:focus { border-color: var(--accent); }

.modal-btns {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

/* ============ 遮罩（移动端抽屉） ============ */
#mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 20, 30, 0.4);
  z-index: 25;
}

/* ============ 移动端 ============ */
@media (max-width: 899px) {
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    box-shadow: var(--shadow);
  }

  #sidebar.open { transform: translateX(0); }

  .actions { width: 100%; }

  .actions .btn { flex: 1; }

  .topbar { gap: 8px; }

  #content { padding: 10px; }

  .note-body { padding: 16px 18px 40px; }

  .f-meta { display: none; }

  .f-actions { opacity: 1; }

  .f-actions .btn.tiny { padding: 4px 8px; }

  .file-row { gap: 8px; padding: 12px 10px; }

  /* 窄屏阅读模式：
     - 隐藏顶部工具栏（上传文件/上传文件夹/新建/下载ZIP）
     - 内容区顶到屏幕顶部、卡片全宽
     - 操作栏（返回/文件名/原文/下载）吸顶固定，
       向下滑动自动收起、向上滑动唤出（bar-hidden） */
  body.previewing .topbar { display: none; }

  body.previewing #content { padding: 0; }

  body.previewing .preview {
    max-width: none;
    border: none;
    border-radius: 0;
    min-height: 100%;
  }

  body.previewing .preview-bar {
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 1px 4px rgba(20, 30, 50, 0.06);
    transition: transform 0.25s ease;
  }

  body.previewing.bar-hidden .preview-bar {
    transform: translateY(-100%);
  }
}

/* ============ 预览布局（含右侧目录） ============ */
.preview-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 20px;
  max-width: 1220px;
  margin: 0 auto;
}

.preview-wrap .preview {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 920px;
  margin: 0;
}

/* ============ 目录（TOC） ============ */
.toc {
  width: var(--toc-w);
  flex-shrink: 0;
  position: sticky;
  top: 12px;
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 13px;
}

.toc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.toc-head .icon-btn {
  font-size: 14px;
  padding: 2px 6px;
}

.toc-list { padding: 6px 4px; }

.toc-item {
  display: block;
  padding: 4px 8px;
  color: var(--muted);
  text-decoration: none;
  border-radius: 6px;
  border-left: 2px solid transparent;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toc-item:hover { background: var(--bg); color: var(--text); }

/* 长标题悬停显示完整内容 */
.toc-item:hover { white-space: normal; word-break: break-all; }

.toc-item.active {
  color: var(--accent);
  background: var(--accent-weak);
  border-left-color: var(--accent);
  font-weight: 600;
}

.toc-item.toc-l1 { font-weight: 700; color: var(--text); }
.toc-item.toc-l2 { padding-left: 22px; }
.toc-item.toc-l3 { padding-left: 34px; }
.toc-item.toc-l4 { padding-left: 46px; }
.toc-item.toc-l5 { padding-left: 58px; }
.toc-item.toc-l6 { padding-left: 70px; }

/* 折叠：收成一条窄栏，仅留展开按钮 */
body.toc-collapsed .toc { width: 32px; }
body.toc-collapsed .toc-list { display: none; }
body.toc-collapsed .toc-head { justify-content: center; padding: 8px 0; }
body.toc-collapsed .toc-title { display: none; }

/* 手机端目录：底部按钮 + 抽屉 */
.toc-btn {
  display: none;
  position: fixed;
  right: 14px;
  bottom: calc(30vh - 20px);
  z-index: 70;
  border-radius: 20px;
  padding: 9px 16px;
  box-shadow: var(--shadow);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

/* 下滑收起时，TOC 按钮跟着隐藏 */
body.bar-hidden .toc-btn {
  transform: translateY(calc(100% + 30px)) !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.toc-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 20, 30, 0.4);
  z-index: 80;
}

.toc-drawer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  min-height: 200px;
  max-height: 62vh;
  background: var(--panel);
  border-radius: 14px 14px 0 0;
  z-index: 85;
  display: flex;
  flex-direction: column;
  box-shadow: 0 -4px 20px rgba(20, 30, 50, 0.12);
}

.toc-drawer:not([hidden]) { animation: tocSlideUp 0.22s ease; }

@keyframes tocSlideUp {
  from { transform: translateY(30%); opacity: 0.5; }
  to { transform: translateY(0); opacity: 1; }
}

.toc-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  flex-shrink: 0;
}

.toc-drawer .toc-list {
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  padding: 8px;
}

.toc-empty {
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

/* ============ 全文搜索 ============ */
.search-wrap {
  position: relative;
  width: 220px;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  outline: none;
  background: var(--panel);
}

.search-input:focus { border-color: var(--accent); }

.search-results {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  max-height: 60vh;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 40;
}

.search-item {
  padding: 9px 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.search-item:last-child { border-bottom: none; }
.search-item:hover { background: var(--bg); }

.search-item-title {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-item-snippet {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
  word-break: break-all;
}

.search-item-snippet mark {
  background: #fff3a3;
  padding: 0 2px;
  border-radius: 3px;
  color: var(--text);
}

.search-empty {
  padding: 14px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

/* ============ 上下篇导航 ============ */
.prev-next {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 32px 24px;
  border-top: 1px solid var(--border);
}

.prev-next-spacer { flex: 1; }

/* ============ 角色：普通用户 / 角色选择 ============ */
.role-chip.user {
  background: #eef2f7;
  color: #4b5563;
}

.role-select {
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  background: var(--panel);
  outline: none;
}

.role-select:focus { border-color: var(--accent); }

.role-select-sm {
  flex-shrink: 0;
  font-size: 12px;
  padding: 4px 6px;
}

/* ============ 浏览器内编辑器 ============ */
.editor {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 1220px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

body.editing #content {
  display: flex;
  overflow: hidden;
  padding: 0;
}

body.editing .editor {
  flex: 1;
  min-height: 0;
  height: auto;
  max-width: none;
  margin: 0;
  border: none;
  border-radius: 0;
}

.editor-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.editor-title {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.editor-actions { display: flex; gap: 8px; }

.editor-main {
  display: flex;
  flex: 1;
  min-height: 0;
}

.editor-text {
  flex: 1;
  min-width: 0;
  border: none;
  border-right: 1px solid var(--border);
  padding: 20px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  resize: none;
  outline: none;
  background: #fff;
}

.editor-preview {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  padding: 20px 24px 48px;
  background: #fff;
}

.editor-tabs { display: none; }

/* ============ 手机端编辑器 / 搜索布局 ============ */
@media (max-width: 899px) {
  .toc { display: none; }

  /* TOC按钮：仅在预览笔记时显示，编辑时隐藏 */
  body.previewing .toc-btn { display: inline-flex !important; }
  body.previewing.editing .toc-btn { display: none !important; }

  body.previewing .preview-wrap { min-height: 100%; }

  .prev-next { padding: 12px 18px 20px; }

  .search-wrap { order: 1; width: 100%; }
  #btnMenu { order: 2; }
  .breadcrumb { order: 3; }
  .actions { order: 4; }

  .editor-main { flex-direction: column; }
  .editor-text { border-right: none; border-bottom: 1px solid var(--border); }
  .editor-preview { display: none; }
  .editor.show-preview .editor-text { display: none; }
  .editor.show-preview .editor-preview { display: block; }
  .editor-tabs {
    display: flex;
    border-top: 1px solid var(--border);
  }
  .editor-tab {
    flex: 1;
    border: none;
    border-radius: 0;
    padding: 10px;
    font-size: 14px;
  }
  .editor-tab.active {
    background: var(--accent);
    color: #fff;
  }
}