:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --warning: #f59e0b;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  min-height: 100vh;
}

/* ===== 顶部导航栏 ===== */
.topbar {
  background: #fff;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 12px;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}
.topbar h2 {
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.topbar-user {
  font-size: 13px;
  color: var(--gray-500);
}
.nav-tabs {
  display: flex;
  gap: 2px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 3px;
}
.nav-tab {
  padding: 6px 14px;
  font-size: 13px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
  color: var(--gray-500);
  font-weight: 500;
  transition: all 0.15s;
  text-decoration: none;
  white-space: nowrap;
}
.nav-tab:hover { color: var(--gray-700); }
.nav-tab.active {
  background: #fff;
  color: var(--gray-900);
  box-shadow: var(--shadow);
}

/* ===== 容器 ===== */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 16px;
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  background: var(--gray-50);
}
.form-input:focus {
  border-color: var(--primary);
  background: #fff;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-outline {
  background: #fff;
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}
.btn-outline:hover { background: var(--gray-50); }

/* ===== 徽章 ===== */
.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-approved { background: #dcfce7; color: #166534; }
.badge-disabled { background: #fee2e2; color: #991b1b; }
.badge-admin { background: #e0e7ff; color: #3730a3; }
.badge-login { background: #dcfce7; color: #166534; }
.badge-nologin { background: var(--gray-100); color: var(--gray-500); }

/* ===== 卡片列表 ===== */
.card-list { display: flex; flex-direction: column; gap: 8px; }
.card-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.card-info { flex: 1; min-width: 0; }
.card-title {
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.card-meta {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 3px;
  word-break: break-all;
}
.card-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* ===== 筛选/搜索 ===== */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.filter-bar .form-input {
  flex: 1;
  min-width: 140px;
}
.filter-tabs {
  display: flex;
  gap: 4px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 3px;
}
.filter-tab {
  padding: 6px 14px;
  font-size: 13px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
  color: var(--gray-500);
  font-weight: 500;
  transition: all 0.15s;
}
.filter-tab.active {
  background: #fff;
  color: var(--gray-900);
  box-shadow: var(--shadow);
}

/* ===== 统计卡片 ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.stat-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  text-align: center;
}
.stat-card .num { font-size: 28px; font-weight: 700; line-height: 1.2; }
.stat-card .label { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.stat-pending .num { color: var(--warning); }
.stat-approved .num { color: var(--success); }
.stat-disabled .num { color: var(--danger); }
.stat-total .num { color: var(--primary); }

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--gray-500);
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  background: #fff;
  color: #374151;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.page-btn:hover {
  border-color: var(--primary, #2563eb);
  color: var(--primary, #2563eb);
}
.page-btn.active {
  background: var(--primary, #2563eb);
  border-color: var(--primary, #2563eb);
  color: #fff;
  font-weight: 600;
}

/* ===== 状态 ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray-500);
  font-size: 14px;
}
.loading {
  text-align: center;
  padding: 30px;
  color: var(--gray-500);
  font-size: 14px;
}

/* ===== 弹窗 ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.modal h3 { font-size: 16px; margin-bottom: 16px; }
.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 999;
  pointer-events: none;
}
.toast {
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  color: #fff;
  transition: all 0.3s;
  white-space: nowrap;
  transform: translateY(-100px);
  opacity: 0;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }

/* ===== 登录页 ===== */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 40px 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}
.login-card h1 { text-align: center; font-size: 22px; margin-bottom: 8px; color: var(--gray-900); }
.login-card .subtitle { text-align: center; font-size: 14px; color: var(--gray-500); margin-bottom: 28px; }
.login-error { color: var(--danger); font-size: 13px; text-align: center; margin-top: 12px; min-height: 18px; }

/* ===== 头像 ===== */
.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gray-100);
  flex-shrink: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  font-size: 18px;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .topbar { padding: 10px 14px; flex-wrap: wrap; }
  .topbar-left { width: 100%; justify-content: space-between; }
  .topbar-right { width: 100%; justify-content: flex-end; }
  .nav-tabs { overflow-x: auto; }
  .container { padding: 12px; }
}

@media (max-width: 600px) {
  .stats { gap: 8px; }
  .stat-card { padding: 12px 8px; }
  .stat-card .num { font-size: 22px; }
  .card-item { flex-direction: column; align-items: flex-start; }
  .card-actions { width: 100%; justify-content: flex-end; }
  .login-card { padding: 28px 20px; }
  .filter-bar { flex-direction: column; }
  .filter-tabs { width: 100%; overflow-x: auto; }
  .filter-tab { flex: 1; text-align: center; }
}