:root {
  --primary: #267ef0;
  --primary-hover: #1a6fe0;
  --primary-light: #e8f3ff;
  --bg-page: #f5f6f7;
  --bg-sidebar: #f7f8fa;
  --bg-card: #ffffff;
  --border: #e5e6eb;
  --text-primary: #1f2329;
  --text-secondary: #8f959e;
  --text-muted: #c9cdd4;
  --success: #00b578;
  --success-bg: #e8fff3;
  --warning: #ff8f1f;
  --warning-bg: #fff7e8;
  --danger: #f53f3f;
  --danger-bg: #ffece8;
  --sidebar-width: 220px;
  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }

body.admin-body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.5;
}

.admin-shell {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 40;
}

.admin-brand {
  padding: 20px 16px 16px;
  border-bottom: 1px solid var(--border);
}

.admin-brand-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}

.admin-brand-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.admin-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin-bottom: 2px;
  border-radius: var(--radius);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
  border-left: 3px solid transparent;
}

.admin-nav-item:hover {
  background: rgba(38, 126, 240, 0.06);
  color: var(--primary);
}

.admin-nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 500;
}

.admin-nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.75;
}

.admin-nav-item.active .admin-nav-icon {
  opacity: 1;
}

.admin-sidebar-foot {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
}

.admin-sidebar-foot a {
  color: var(--text-secondary);
  text-decoration: none;
}

.admin-sidebar-foot a:hover {
  color: var(--primary);
}

.admin-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 30;
}

.admin-header h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.admin-header-desc {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.admin-content {
  padding: 20px 24px 32px;
  flex: 1;
}

.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.admin-card-pad {
  padding: 16px 20px;
}

.admin-card-title {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.admin-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.admin-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.admin-stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.admin-stat-value {
  font-size: 28px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.1;
}

.admin-stat-value.muted { color: var(--text-primary); }
.admin-stat-value.warn { color: var(--warning); }
.admin-stat-value.danger { color: var(--danger); }

.admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 16px;
  font-size: 13px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.4;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.admin-btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.admin-btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.admin-btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border);
}

.admin-btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.admin-btn-danger-outline {
  background: var(--bg-card);
  color: var(--danger);
  border-color: #ffccc7;
}

.admin-btn-danger-outline:hover {
  background: var(--danger-bg);
}

.admin-btn-success {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

.admin-input,
.admin-select,
.admin-textarea {
  width: 100%;
  padding: 8px 12px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  background: var(--bg-card);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.admin-input:focus,
.admin-select:focus,
.admin-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(38, 126, 240, 0.15);
}

.admin-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.admin-field { margin-bottom: 14px; }

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

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.admin-table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 500;
  color: var(--text-secondary);
  background: #fafbfc;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.admin-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.admin-table tbody tr:hover {
  background: #fafbfc;
}

.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.admin-table a.row-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
}

.admin-table a.row-link:hover {
  color: var(--primary);
}

.admin-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  border-radius: 4px;
  font-weight: 400;
}

.admin-badge-blue {
  background: var(--primary-light);
  color: var(--primary);
}

.admin-badge-gray {
  background: #f2f3f5;
  color: var(--text-secondary);
}

.admin-badge-amber {
  background: var(--warning-bg);
  color: var(--warning);
}

.admin-badge-green {
  background: var(--success-bg);
  color: var(--success);
}

.admin-badge-red {
  background: var(--danger-bg);
  color: var(--danger);
}

.admin-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  align-items: center;
}

.admin-filter-bar .admin-input,
.admin-filter-bar .admin-select {
  width: auto;
  min-width: 140px;
  flex: 1;
  max-width: 200px;
}

.admin-empty {
  padding: 48px 16px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

.admin-alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 16px;
  border: 1px solid;
}

.admin-alert-success {
  background: var(--success-bg);
  color: #00875a;
  border-color: #b7f0d8;
}

.admin-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.admin-grid-3 {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
}

@media (max-width: 900px) {
  .admin-grid-2,
  .admin-grid-3 {
    grid-template-columns: 1fr;
  }
}

.admin-chat-bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
}

.admin-chat-bubble-user {
  background: #f2f3f5;
  color: var(--text-primary);
}

.admin-chat-bubble-bot {
  background: var(--primary-light);
  color: var(--text-primary);
}

.admin-chat-meta {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.admin-chat-area {
  max-height: 520px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.admin-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.admin-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

.admin-login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-page);
  padding: 24px;
}

.admin-login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
}

.admin-login-title {
  text-align: center;
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 8px;
}

.admin-login-sub {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.admin-log-viewer {
  background: #1a1d24;
  color: #7ee787;
  border-radius: var(--radius);
  padding: 16px;
  font-family: "Consolas", "Monaco", monospace;
  font-size: 12px;
  overflow: auto;
  max-height: 70vh;
  line-height: 1.6;
}

.admin-log-line {
  white-space: pre-wrap;
  word-break: break-all;
}

.admin-eval-box {
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 10px 12px;
  border-radius: var(--radius);
  margin-top: 8px;
}

.admin-mobile-toggle {
  display: none;
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 50;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(38, 126, 240, 0.4);
  cursor: pointer;
  font-size: 20px;
}

@media (max-width: 768px) {
  .admin-sidebar {
    transform: translateX(-100%);
    transition: transform 0.2s;
  }

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

  .admin-main {
    margin-left: 0;
  }

  .admin-mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .admin-content {
    padding: 16px;
  }
}