:root {
  --bg: #f5f4f0;
  --panel: #ffffff;
  --ink: #2b2a26;
  --muted: #8a867c;
  --line: #e3e0d8;
  --accent: #4a6b8a;
  --accent-ink: #fff;
  --danger: #b04a3a;
  --ok: #3a7a4e;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", serif;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--accent); text-decoration: none; }

/* 登录 */
.login-body { display: grid; place-items: center; min-height: 100vh; }
.login-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 36px 40px; width: 340px; box-shadow: 0 12px 40px rgba(0,0,0,.06);
  display: flex; flex-direction: column; gap: 14px;
}
.login-card h1 { margin: 0 0 6px; font-size: 20px; text-align: center; }
.login-card input {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; font-size: 15px;
}
.login-card button {
  padding: 10px; border: 0; border-radius: 6px; background: var(--accent);
  color: var(--accent-ink); font-size: 15px; cursor: pointer;
}
.error { color: var(--danger); margin: 0; font-size: 14px; }

/* 顶栏 */
.topbar {
  display: flex; align-items: center; gap: 10px;
  background: var(--panel); border-bottom: 1px solid var(--line);
  padding: 10px 16px; position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; letter-spacing: .05em; }
.spacer { flex: 1; }
.who { color: var(--muted); }
.btn {
  display: inline-block; padding: 5px 12px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--panel); color: var(--ink); font-size: 14px; cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.sm { padding: 2px 8px; font-size: 13px; }
.btn.danger:hover { border-color: var(--danger); color: var(--danger); }

/* 键盘可达性 / 触控 */
a:focus-visible, .btn:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
a, .btn { touch-action: manipulation; }
body { -webkit-tap-highlight-color: transparent; }
/* 弹窗/抽屉滚动不穿透 */
.diff-box, .edit-layout aside { overscroll-behavior: contain; }
/* 表格数字列等宽 */
.list td, .book-stats, .statusbar, .vitem .meta { font-variant-numeric: tabular-nums; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* 列表页 */
.wrap { max-width: 1000px; margin: 24px auto; padding: 0 16px; }
.book-stats { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.book-stats b { color: var(--ink); }
table.list { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); }
.list th, .list td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; }
.list th { color: var(--muted); font-weight: 500; background: #faf9f6; }
.list td.t a { font-weight: 600; }
.list td:last-child { white-space: nowrap; }   /* 操作按钮排一行 */
.lock.busy { color: var(--danger); }
.lock.free { color: var(--ok); }

/* 进度状态 */
.st { font-size: 13px; padding: 1px 8px; border-radius: 4px; white-space: nowrap; }
.st-draft { background: var(--bg); color: var(--muted); }
.st-review { background: #fdf3e7; color: #8a5a1a; }
.st-pending_review { background: #eef2fb; color: #3451b2; }
.st-final { background: #e7efe9; color: var(--ok); }
.st-select { font-size: 13px; padding: 2px 4px; border: 1px solid var(--line); border-radius: 4px; background: var(--panel); }
.admin-bar { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.admin-bar input { padding: 6px 10px; border: 1px solid var(--line); border-radius: 6px; }
.hint { color: var(--muted); font-size: 13px; }

/* 编辑页 */
.notice {
  background: #fdf3e7; color: #8a5a1a; border-bottom: 1px solid #f0d9b8;
  padding: 8px 16px; font-size: 14px;
}
.edit-layout {
  display: grid; grid-template-columns: 220px 1fr 280px;
  height: calc(100vh - 76px); /* 顶栏 47 + 底部状态栏 29 */
}
.statusbar {
  display: flex; align-items: center; gap: 12px;
  background: var(--panel); border-top: 1px solid var(--line);
  padding: 5px 16px; font-size: 13px; color: var(--muted);
  position: sticky; bottom: 0;
}
.edit-body .topbar { position: static; }
.edit-layout aside { background: var(--panel); border-right: 1px solid var(--line); overflow-y: auto; padding: 14px; }
.edit-layout .versions { border-right: 0; border-left: 1px solid var(--line); }
.edit-layout h3 { margin: 0 0 10px; font-size: 14px; color: var(--muted); font-weight: 600; }
.editor-wrap { overflow: hidden; }

.outline a { display: block; padding: 3px 6px; font-size: 13px; color: var(--ink); border-radius: 4px; }
.outline a:hover { background: var(--bg); }
.outline a.lv2 { padding-left: 18px; }
.outline a.lv3 { padding-left: 30px; }  /* 0929: 去灰色(误读为不可点), 仅缩进分层 */

.save-status { color: var(--muted); font-size: 13px; }
.save-status.dirty { color: #8a5a1a; }

/* 版本面板 */
.vpanel-btns { display: flex; gap: 8px; margin-top: 10px; }
.trail-box { width: min(900px, 94vw); }
.trail-legend { padding: 8px 16px 0; font-size: 14px; }
.trail-body { font-size: 16px; line-height: 2; }
.vlist { font-size: 13px; }

/* 备注区 */
/* 作者配色（按 user_id % 8 固定，与修订痕迹一致） */
.au-0 { color: #1f5fa8; } .au-1 { color: #b04a3a; } .au-2 { color: #2e7d32; } .au-3 { color: #8a5a1a; }
.au-4 { color: #6b4a8a; } .au-5 { color: #0e7c86; } .au-6 { color: #a03a6b; } .au-7 { color: #5a6b0f; }
.note-item.au-b-0 { border-left: 3px solid #1f5fa8; padding-left: 8px; }
.note-item.au-b-1 { border-left: 3px solid #b04a3a; padding-left: 8px; }
.note-item.au-b-2 { border-left: 3px solid #2e7d32; padding-left: 8px; }
.note-item.au-b-3 { border-left: 3px solid #8a5a1a; padding-left: 8px; }
.note-item.au-b-4 { border-left: 3px solid #6b4a8a; padding-left: 8px; }
.note-item.au-b-5 { border-left: 3px solid #0e7c86; padding-left: 8px; }
.note-item.au-b-6 { border-left: 3px solid #a03a6b; padding-left: 8px; }
.note-item.au-b-7 { border-left: 3px solid #5a6b0f; padding-left: 8px; }
.note-input { display: flex; gap: 6px; margin-bottom: 10px; }
.note-input textarea {
  flex: 1; min-height: 54px; resize: vertical;
  padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px;
  font: 13px/1.6 inherit; font-family: inherit;
}
.note-list { font-size: 13px; }
.note-item { border-bottom: 1px solid var(--line); padding: 8px 0; }
.note-head { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.note-head > span:first-child { font-weight: 600; }
.note-time { color: var(--muted); font-size: 12px; }
.note-body { margin: 4px 0; white-space: pre-wrap; word-break: break-word; }
.note-acts { display: flex; gap: 6px; }

/* 版本历史折叠 */
#versions-fold { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 10px; }
#versions-fold summary {
  cursor: pointer; font-size: 14px; font-weight: 600; color: var(--muted);
  padding: 2px 0 10px; touch-action: manipulation;
}
#versions-fold summary:hover { color: var(--ink); }
.vitem { border-bottom: 1px solid var(--line); padding: 8px 0; }
.vitem .meta { color: var(--muted); display: block; margin: 4px 0; }
.vitem .who { color: var(--ink); font-weight: 600; }
.tag { font-size: 11px; padding: 1px 6px; border-radius: 4px; background: var(--bg); color: var(--muted); }
.tag.manual { background: #e7efe9; color: var(--ok); }
.tag.rollback { background: #f7e8e4; color: var(--danger); }

/* diff 弹层 */
.diff-modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 100;
  display: grid; place-items: center;
}
.diff-box {
  background: var(--panel); border-radius: 10px; width: min(860px, 92vw);
  max-height: 84vh; display: flex; flex-direction: column;
}
.diff-box header { display: flex; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.diff-box .body { overflow-y: auto; padding: 16px; line-height: 1.9; }
.diff-box ins { background: #dff0e2; text-decoration: none; }
.diff-box del { background: #f7ddd7; color: var(--danger); }

/* 版本只读查看 */
.version-view { background: var(--panel); }
.vv-bar {
  position: sticky; top: 0; background: var(--bg); border-bottom: 1px solid var(--line);
  padding: 10px 20px; font-size: 14px; color: var(--muted);
}
.vv-content { max-width: 820px; margin: 24px auto; padding: 0 20px; font-family: var(--serif); }
.vv-content img { max-width: 100%; }

/* TinyMCE 内容区基础排版（编辑器内与只读页一致） */
.tox-tinymce { border: 0 !important; }
.mce-content-body img { max-width: 100%; height: auto; }
.mce-content-body { font-family: var(--serif); font-size: 16px; line-height: 1.9; }

/* ---------- 手机适配（≤900px） ---------- */
.mobile-only { display: none; }
@media (max-width: 900px) {
  .mobile-only { display: inline-block; }
  .topbar { flex-wrap: wrap; gap: 6px; padding: 8px 10px; }
  .topbar .title { flex-basis: 100%; order: 9; font-size: 15px; }
  .edit-layout {
    grid-template-columns: 1fr;
    height: calc(100vh - 92px);
  }
  .edit-layout aside {
    display: none;
    position: fixed; top: 0; bottom: 0; z-index: 60;
    width: min(78vw, 300px); padding: 14px;
    box-shadow: 0 0 30px rgba(0,0,0,.2);
  }
  body.show-outline .outline { display: block; left: 0; }
  body.show-versions .versions { display: block; right: 0; }
  /* 表格横向滚动 */
  .wrap { padding: 0 8px; }
  table.list { display: block; overflow-x: auto; white-space: nowrap; }
  /* 登录卡、弹窗留边 */
  .login-card { width: calc(100vw - 32px); }
  .diff-box { width: 94vw; }
}

/* 版本短哈希（git 风格） */
.vhash { font-size: 12px; color: #6b7280; background: #f3f4f6; border-radius: 3px; padding: 0 4px; margin-right: 4px; }