:root {
  --primary: #1e4bb6;
  --primary-light: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --sidebar-width: 240px;
  --header-height: 56px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* Login */
.login-body {
  min-height: 100vh;
  background: linear-gradient(135deg, #e0f2fe 0%, #eff6ff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-wrapper {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(30, 75, 182, 0.12);
  padding: 36px 32px;
  text-align: center;
}

.login-card.text-left { text-align: left; }

.login-logo {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
}

.login-header h1 {
  font-size: 22px;
  color: var(--primary-dark);
  margin-bottom: 6px;
}

.login-header p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.login-tabs {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
}

.login-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 12px;
  font-size: 15px;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: .2s;
}

.login-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.form-group {
  margin-bottom: 18px;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border .2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.captcha-row {
  display: flex;
  gap: 10px;
}

.captcha-row input { flex: 1; }

.captcha-box {
  width: 120px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  overflow: hidden;
}

.captcha-box svg { width: 100%; height: 100%; }

.error-msg {
  color: var(--danger);
  font-size: 13px;
  min-height: 20px;
  margin-bottom: 10px;
  text-align: left;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  transition: .2s;
  background: #fff;
  color: var(--text);
}

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

.btn-primary:hover { background: var(--primary-dark); }

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

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

.btn-sm { padding: 6px 12px; font-size: 13px; }

.btn-block { width: 100%; padding: 12px; font-size: 16px; }

.login-extra {
  margin-top: 18px;
  font-size: 13px;
}

.login-footer {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

.login-footer .company { margin-top: 6px; }

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform .3s;
}

.sidebar-brand {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #fff;
  padding: 3px;
}

.sidebar-brand span {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
}

.sidebar-brand small {
  font-size: 12px;
  font-weight: 400;
  color: #94a3b8;
}

.sidebar-menu {
  flex: 1;
  overflow-y: auto;
  padding: 10px 0;
}

.menu-group {
  margin-bottom: 4px;
}

.menu-group-title {
  padding: 10px 18px;
  color: #94a3b8;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 11px 18px;
  color: #cbd5e1;
  cursor: pointer;
  transition: .2s;
  border-left: 3px solid transparent;
}

.menu-item:hover { background: rgba(255,255,255,0.05); color: #fff; }

.menu-item.active {
  background: rgba(37, 99, 235, 0.15);
  color: #fff;
  border-left-color: var(--primary-light);
}

.menu-item .icon { width: 20px; margin-right: 10px; text-align: center; }

.menu-children {
  background: rgba(0,0,0,0.15);
}

.menu-child {
  padding: 9px 18px 9px 48px;
  color: #94a3b8;
  cursor: pointer;
  font-size: 13px;
}

.menu-child:hover { color: #fff; background: rgba(255,255,255,0.04); }

.menu-child.active { color: #fff; background: rgba(37, 99, 235, 0.2); }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 11px;
  color: #64748b;
  text-align: center;
}

.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  height: var(--header-height);
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text);
}

#pageTitle { font-size: 17px; font-weight: 600; }

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.main-content {
  flex: 1;
  padding: 20px;
  overflow-x: auto;
}

/* Dashboard */
.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.stat-card.green { border-left-color: var(--secondary); }
.stat-card.orange { border-left-color: var(--warning); }
.stat-card.red { border-left-color: var(--danger); }

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
}

.stat-unit {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 4px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.card-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title { font-size: 15px; font-weight: 600; }

.card-body { padding: 18px; }

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

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

th, td {
  padding: 11px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

tr:hover { background: #f8fafc; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }

/* List page */
.page-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  gap: 8px;
}

.search-box input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 240px;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  justify-content: flex-end;
}

.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  cursor: pointer;
}

.pagination button:disabled { opacity: .5; cursor: not-allowed; }

.pagination .active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
}

.modal-content {
  background: var(--card);
  border-radius: 12px;
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-wrapper { margin-left: 0; }
  .menu-toggle { display: block; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .search-box input { width: 160px; }
}