:root {
  --bg-primary: #0a0a0a;
  --bg-surface: #111;
  --bg-elevated: #1a1a1a;
  --bg-hover: #222;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #888888;
  --border-color: #2a2a2a;
  --border-light: #1e1e1e;
  --accent: #fff;
  --accent-hover: #ccc;
  --danger: #ff5252;
  --success: #4ade80;
  --info: #60a5fa;
  --warning: #fbbf24;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 12px rgba(0,0,0,.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.6);
  --font: Inter, "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --header-h: 56px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text-primary);
  background: var(--bg-primary);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button, input, textarea, select { font-family: inherit; }

/* ─── App Shell ─── */
.app-shell {
  min-height: 100vh;
  background: var(--bg-primary);
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ─── Header ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 24px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(10,10,10,.92);
  backdrop-filter: blur(12px);
}
.site-header .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .5px;
}
.site-header .logo .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
}
.site-header .logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.header-actions .user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  border-radius: 20px;
  cursor: default;
}
.header-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s ease;
}
.header-btn:hover { border-color: #666; color: var(--text-primary); background: var(--bg-elevated); }
.header-btn.primary { background: #fff; color: #000; border-color: #fff; font-weight: 600; }
.header-btn.primary:hover { background: #e0e0e0; border-color: #e0e0e0; }
.header-btn.danger { color: var(--danger); }
.header-btn.danger:hover { border-color: var(--danger); background: rgba(231,76,60,.1); }

/* ─── Canvas Page ─── */
.canvas-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-h));
  overflow: hidden;
}

/* ─── Canvas Toolbar ─── */
.canvas-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  flex-shrink: 0;
}
.canvas-toolbar .search-input {
  width: 240px;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border .15s;
}
.canvas-toolbar .search-input:focus { border-color: #666; }
.canvas-toolbar .search-input::placeholder { color: var(--text-muted); }
.canvas-toolbar .filter-select {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  cursor: pointer;
}
.canvas-toolbar .filter-select:focus { border-color: #666; }
.canvas-toolbar .toolbar-stat {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}
.canvas-toolbar .toolbar-stat span {
  color: var(--text-muted);
  font-size: 13px;
}
.canvas-toolbar .toolbar-stat strong {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
}
.zoom-control {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
}
.zoom-control button {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: transparent;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.zoom-control button:hover { border-color: #555; color: var(--text-primary); }
.zoom-control .zoom-label {
  min-width: 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
}

/* ─── Tree Canvas ─── */
.tree-canvas {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: grab;
  background:
    linear-gradient(var(--border-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
}
.tree-canvas.grabbing {
  cursor: grabbing;
}
.tree-stage {
  position: absolute;
  width: 1200px;
  height: 600px;
}
.tree-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.tree-line {
  fill: none;
  stroke: #333;
  stroke-width: 2;
  stroke-linecap: round;
}
.tree-line.thick { stroke-width: 4; }
.tree-line.thin { stroke-width: 1.5; }
.tree-dot {
  fill: var(--bg-primary);
  stroke: #444;
  stroke-width: 2;
}

/* ─── Node Cards ─── */
.node-card {
  position: absolute;
  z-index: 2;
  width: 156px;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-surface);
  cursor: pointer;
  transform: translate(-50%, -50%);
  transition: all .15s ease;
  user-select: none;
}
.node-card:hover {
  border-color: #555;
  background: var(--bg-elevated);
  transform: translate(-50%, -52%);
  box-shadow: var(--shadow);
}
.node-card.active {
  border-color: #fff;
  background: #1a1a1a;
  box-shadow: 0 0 0 1px rgba(255,255,255,.15), var(--shadow-lg);
}
.node-card .node-level {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  background: #333;
  color: #ccc;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .5px;
}
.node-card .node-name {
  display: block;
  margin-top: 8px;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
}
.node-card .node-badge {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 11px;
}
.node-card .node-badge.fav { color: var(--warning); }
.node-card .node-badge.learn { color: var(--info); }
.node-card .node-badge.done { color: var(--success); }
.node-card .node-status-dot {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}
.node-card .node-status-dot.learning { background: var(--info); }
.node-card .node-status-dot.mastered { background: var(--success); }
.node-card .node-status-dot.favorited { background: var(--warning); }

/* ─── Branch Labels ─── */
.branch-label {
  position: absolute;
  z-index: 1;
  padding: 10px 14px;
  border-left: 3px solid #555;
  background: rgba(17,17,17,.9);
  pointer-events: none;
}
.branch-label strong {
  display: block;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 700;
}
.branch-label span {
  color: var(--text-secondary);
  font-size: 12px;
}

/* ─── Node Detail Dialog ─── */
.node-dialog .el-dialog {
  --el-dialog-width: 640px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  padding: 0;
  overflow: hidden;
}
.node-dialog .el-dialog__header {
  display: none;
}
.node-dialog .el-dialog__body {
  padding: 0;
}
.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border-color);
}
.dialog-header .dh-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.dialog-header h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
}
.dialog-header .dh-level {
  padding: 3px 12px;
  border-radius: 12px;
  background: #333;
  color: #ccc;
  font-size: 12px;
  font-weight: 600;
}
.dialog-header .dh-close {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: transparent;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
}
.dialog-header .dh-close:hover { border-color: #555; color: var(--text-primary); }
.dialog-body {
  padding: 16px 24px 20px;
  max-height: 65vh;
  overflow-y: auto;
}
.dialog-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}
.dialog-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  text-decoration: none;
}
.dialog-action-btn:hover { border-color: #666; color: var(--text-primary); background: var(--bg-elevated); }
.dialog-action-btn.active { background: #fff; color: #000; border-color: #fff; font-weight: 600; }
.dialog-action-btn.active-fav { background: #333; color: var(--warning); border-color: #666; }
.dialog-action-btn.active-learn { background: rgba(96,165,250,.15); color: var(--info); border-color: var(--info); }
.dialog-action-btn.active-done { background: rgba(74,222,128,.15); color: var(--success); border-color: var(--success); }
.dialog-desc {
  margin: 0 0 16px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  white-space: pre-wrap;
}
.dialog-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.dialog-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  transition: all .15s;
}
.dialog-links a:hover { border-color: #666; background: var(--bg-elevated); }
.dialog-links .no-link {
  color: var(--text-muted);
  font-size: 14px;
  padding: 10px 0;
}
.dialog-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}
.dialog-tab {
  padding: 10px 18px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  margin-bottom: -1px;
}
.dialog-tab:hover { color: var(--text-secondary); }
.dialog-tab.active { color: var(--text-primary); border-bottom-color: #fff; font-weight: 600; }

/* ─── Comments ─── */
.comment-thread { margin-bottom: 12px; }
.comment-item {
  padding: 12px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
}
.comment-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.comment-head strong { font-size: 13px; font-weight: 600; }
.comment-head span { color: var(--text-muted); font-size: 12px; }
.comment-item p {
  margin: 4px 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
}
.comment-actions { display: flex; gap: 8px; margin-top: 6px; }
.comment-actions button {
  border: 0;
  padding: 2px 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
}
.comment-actions button:hover { color: var(--text-primary); }
.comment-actions .del-btn { color: var(--danger); }
.reply-item { margin: 8px 0 0 24px; padding-left: 12px; border-left: 2px solid var(--border-color); }
.composer { margin-bottom: 12px; }
.composer textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  resize: vertical;
  outline: none;
}
.composer textarea:focus { border-color: #555; }
.composer textarea::placeholder { color: var(--text-muted); }
.composer .composer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}
.login-tip {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  background: var(--bg-primary);
  margin-bottom: 12px;
}

/* ─── Resources ─── */
.resource-list { display: grid; gap: 8px; }
.resource-item {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  transition: border .15s;
}
.resource-item:hover { border-color: #444; }
.resource-item strong { display: block; font-size: 13px; font-weight: 600; }
.resource-item span { color: var(--text-muted); font-size: 12px; }
.resource-item p { margin: 4px 0 0; color: var(--text-secondary); font-size: 12px; }

/* ─── Forms ─── */
.compact-form { display: grid; gap: 10px; }
.compact-form input,
.compact-form select,
.compact-form textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}
.compact-form input:focus,
.compact-form select:focus,
.compact-form textarea:focus { border-color: #555; }
.compact-form label { color: var(--text-secondary); font-size: 12px; font-weight: 500; }
.compact-form .radio-group { display: flex; gap: 4px; }
.compact-form .radio-group label {
  padding: 4px 14px;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  transition: all .15s;
}
.compact-form .radio-group label:hover { border-color: #555; color: var(--text-secondary); }
.compact-form .radio-group input:checked + label { border-color: #fff; color: #fff; background: #222; }
.compact-form input[type="radio"] { display: none; }

.submit-btn {
  padding: 8px 20px;
  border: 1px solid #fff;
  border-radius: 20px;
  background: #fff;
  color: #000;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.submit-btn:hover { background: #ccc; border-color: #ccc; }
.submit-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ─── Dialog / Auth ─── */
.custom-dialog .el-dialog {
  --el-dialog-width: 380px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}
.custom-dialog .el-dialog__header { padding: 20px 24px 0; }
.custom-dialog .el-dialog__title { color: var(--text-primary); font-size: 16px; font-weight: 700; }
.custom-dialog .el-dialog__body { padding: 16px 24px 24px; }
.custom-dialog .el-dialog__headerbtn .el-dialog__close { color: var(--text-muted); }
.custom-dialog .el-dialog__headerbtn:hover .el-dialog__close { color: var(--text-primary); }

.dialog-form { display: grid; gap: 12px; }
.dialog-form .auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 8px;
}
.dialog-form .auth-tab {
  flex: 1;
  padding: 8px 0;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
}
.dialog-form .auth-tab.active { color: var(--text-primary); border-bottom-color: #fff; }
.dialog-form input {
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}
.dialog-form input:focus { border-color: #555; }
.dialog-form input::placeholder { color: var(--text-muted); }

/* ─── Empty State ─── */
.empty-state {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-muted);
}
.empty-state p { margin: 0; font-size: 14px; }

/* ═══════════════════════════════════════════
             ADMIN
   ═══════════════════════════════════════════ */
.admin-page {
  min-height: 100vh;
  background: var(--bg-primary);
}

/* ─── Admin Login ─── */
.admin-login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.admin-login-card {
  width: 360px;
  padding: 32px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
}
.admin-login-card h1 {
  margin: 0 0 4px;
  font-size: 20px;
  font-weight: 700;
}
.admin-login-card p {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 13px;
}
.admin-login-card .login-form { display: grid; gap: 12px; }
.admin-login-card .login-form input {
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}
.admin-login-card .login-form input:focus { border-color: #555; }

/* ─── Admin Layout ─── */
.admin-layout {
  display: flex;
  min-height: 100vh;
}
.admin-sidebar {
  width: 200px;
  flex-shrink: 0;
  border-right: 1px solid var(--border-color);
  background: var(--bg-surface);
  padding: 16px 0;
}
.admin-sidebar .sidebar-brand {
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 8px;
}
.admin-sidebar .sidebar-brand strong {
  font-size: 14px;
  font-weight: 700;
}
.admin-sidebar .sidebar-brand span {
  display: block;
  color: var(--text-muted);
  font-size: 11px;
  margin-top: 2px;
}
.admin-sidebar .nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 20px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: all .1s;
}
.admin-sidebar .nav-item:hover { color: var(--text-secondary); background: var(--bg-elevated); }
.admin-sidebar .nav-item.active {
  color: var(--text-primary);
  background: #1a1a1a;
  border-right: 2px solid #fff;
}
.admin-sidebar .nav-item .badge {
  margin-left: auto;
  padding: 1px 7px;
  border-radius: 10px;
  background: #222;
  color: var(--text-muted);
  font-size: 11px;
}
.admin-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  flex-shrink: 0;
}
.admin-topbar h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}
.admin-topbar .topbar-actions { display: flex; gap: 8px; }
.admin-content {
  flex: 1;
  padding: 20px 24px;
  overflow-y: auto;
}

/* ─── Admin Stats ─── */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.admin-stats .stat-card {
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-surface);
}
.admin-stats .stat-card strong {
  display: block;
  font-size: 24px;
  font-weight: 700;
}
.admin-stats .stat-card span {
  color: var(--text-muted);
  font-size: 12px;
}

/* ─── Admin Table ─── */
.admin-table-wrap {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
}
.admin-table th {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}
.admin-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 13px;
  vertical-align: middle;
}
.admin-table tr:last-child td { border-bottom: 0; }
.admin-table tr:hover td { background: rgba(255,255,255,.02); }
.admin-table .cell-muted { color: var(--text-muted); font-size: 12px; }
.admin-table .status-on { color: var(--success); }
.admin-table .status-off { color: var(--text-muted); }
.admin-table .actions-cell { display: flex; gap: 4px; }
.admin-table .actions-cell button {
  padding: 4px 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
}
.admin-table .actions-cell button:hover { border-color: #555; color: var(--text-primary); }
.admin-table .actions-cell button.del { color: var(--danger); }
.admin-table .actions-cell button.del:hover { border-color: var(--danger); }

/* ─── Admin Add Form ─── */
.admin-add-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.admin-add-bar input,
.admin-add-bar select {
  padding: 6px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 12px;
  outline: none;
}
.admin-add-bar input:focus,
.admin-add-bar select:focus { border-color: #555; }
.admin-add-bar input { min-width: 120px; }
.admin-add-bar .small-input { min-width: 80px; }
.admin-add-bar .add-btn {
  padding: 6px 14px;
  border: 1px solid #fff;
  border-radius: 6px;
  background: #fff;
  color: #000;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.admin-add-bar .add-btn:hover { background: #ccc; border-color: #ccc; }

/* ─── Review Rows ─── */
.review-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  margin-bottom: 8px;
}
.review-row .rr-body { min-width: 0; flex: 1; }
.review-row .rr-body strong { display: block; font-size: 14px; font-weight: 600; }
.review-row .rr-body span { color: var(--text-muted); font-size: 12px; }
.review-row .rr-body p { margin: 6px 0 0; color: var(--text-secondary); font-size: 13px; }
.review-row .rr-body a {
  display: inline-block;
  margin-top: 6px;
  color: var(--info);
  font-size: 12px;
}
.review-row .rr-actions { display: flex; gap: 6px; flex-shrink: 0; }
.review-row .rr-actions button {
  padding: 5px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
}
.review-row .rr-actions button.approve { color: var(--success); border-color: var(--success); }
.review-row .rr-actions button.approve:hover { background: rgba(46,204,113,.1); }
.review-row .rr-actions button.reject { color: var(--danger); border-color: var(--danger); }
.review-row .rr-actions button.reject:hover { background: rgba(231,76,60,.1); }
.review-row .diff-box {
  margin-top: 8px;
  padding: 10px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  background: var(--bg-primary);
}
.review-row .diff-box p { margin: 4px 0; font-size: 12px; color: var(--text-secondary); }
.review-row .diff-box b { color: var(--text-primary); }

/* ─── Admin Empty ─── */
.settings-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 560px;
}
.settings-group {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  background: var(--bg-secondary);
}
.settings-group h3 {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 700;
}
.settings-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.settings-form label {
  font-size: 12px;
  color: var(--text-muted);
}
.settings-form input,
.settings-form select {
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}
.settings-form input:focus,
.settings-form select:focus { border-color: var(--text-muted); }

.admin-empty {
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
}
.admin-empty p { margin: 0; font-size: 14px; }

/* ─── Element Plus Overrides ─── */
.el-message { --el-message-bg-color: var(--bg-elevated) !important; --el-message-border-color: var(--border-color) !important; --el-message-text-color: var(--text-primary) !important; --el-message-shadow: var(--shadow-lg) !important; }
.el-message-box { --el-messagebox-bg-color: var(--bg-surface) !important; --el-messagebox-border-color: var(--border-color) !important; --el-messagebox-title-color: var(--text-primary) !important; --el-messagebox-content-color: var(--text-secondary) !important; }
.el-message-box__btns .el-button { --el-button-bg-color: transparent; --el-button-border-color: var(--border-color); --el-button-text-color: var(--text-secondary); }
.el-message-box__btns .el-button--primary { --el-button-bg-color: #fff; --el-button-border-color: #fff; --el-button-text-color: #000; }
.el-overlay { background: rgba(0,0,0,.6); }
.el-loading-mask { background: rgba(10,10,10,.6); }
.el-loading-spinner .path { stroke: #555 !important; }

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .admin-sidebar { width: 160px; }
  .admin-content { padding: 16px; }
  .admin-table-wrap { overflow-x: auto; }
  .node-dialog .el-dialog { --el-dialog-width: 92vw; }
}
@media (max-width: 640px) {
  .site-header { padding: 0 12px; }
  .site-header .logo { font-size: 13px; }
  .canvas-toolbar { flex-wrap: wrap; padding: 8px 12px; }
  .canvas-toolbar .search-input { width: 100%; }
  .canvas-toolbar .toolbar-stat { margin-left: 0; }
  .admin-sidebar { display: none; }
  .admin-layout { flex-direction: column; }
  .admin-topbar { padding: 10px 12px; }
}