:root {
  --sidebar-width: 250px;
  --sidebar-bg: #1e293b;
  --sidebar-hover: #334155;
  --sidebar-active: #2563eb;
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --topbar-bg: #ffffff;
  --content-bg: #f1f5f9;
  --card-bg: #ffffff;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 8px;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--content-bg);
  margin: 0;
  color: var(--text);
  overflow-x: hidden;
}

.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform 0.3s ease;
}

.sidebar-brand {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 64px;
}

.sidebar-brand img {
  height: 32px;
}

.sidebar-brand span {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
}

.sidebar-nav li a:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-text-active);
}

.sidebar-nav li a.active {
  background: rgba(37, 99, 235, 0.15);
  color: var(--sidebar-text-active);
  border-left-color: var(--sidebar-active);
}

.sidebar-nav li a svg,
.sidebar-nav li a .uk-icon {
  width: 18px;
  height: 18px;
  opacity: 0.7;
  flex-shrink: 0;
}

.sidebar-nav li a.active svg,
.sidebar-nav li a.active .uk-icon {
  opacity: 1;
}

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-footer a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 8px 0;
  transition: color 0.15s;
}

.sidebar-footer a:hover {
  color: var(--danger);
}

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

.topbar {
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-user {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.page-content {
  flex: 1;
  padding: 24px;
}

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

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

.card-header h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.card-body {
  padding: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-success {
  background: #dcfce7;
  color: #166534;
}

.badge-danger {
  background: #fce4ec;
  color: #c62828;
}

.badge-warning {
  background: #fff3e0;
  color: #e65100;
}

.badge-info {
  background: #e3f2fd;
  color: #1565c0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  background: var(--content-bg);
}

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

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

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

.btn-success:hover {
  background: #16a34a;
  border-color: #16a34a;
}

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

.btn-danger:hover {
  background: #dc2626;
  border-color: #dc2626;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

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

.form-control:disabled {
  background: var(--content-bg);
  cursor: not-allowed;
}

select.form-control {
  appearance: auto;
}

select.form-control:disabled {
  opacity: 0.6;
}

.form-error {
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 4px;
}

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

table.dataTable {
  width: 100% !important;
  border-collapse: collapse;
  font-size: 0.85rem;
}

table.dataTable thead th {
  background: #f8fafc;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

table.dataTable tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

table.dataTable tbody tr:hover {
  background: #f8fafc;
}

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

.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter {
  margin-bottom: 12px;
}

.dataTables_wrapper .dataTables_length label,
.dataTables_wrapper .dataTables_filter label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.dataTables_wrapper .dataTables_filter input {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.85rem;
  outline: none;
  margin-left: 6px;
}

.dataTables_wrapper .dataTables_filter input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.dataTables_wrapper .dataTables_length select {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.85rem;
  margin: 0 4px;
}

.dataTables_wrapper .dataTables_info {
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 8px;
}

.dataTables_wrapper .dataTables_paginate {
  padding-top: 8px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
  padding: 4px 10px;
  margin: 0 2px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text);
  cursor: pointer;
  display: inline-block;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
  background: var(--content-bg);
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
  background: var(--primary-hover);
}

table.dataTable.no-footer {
  border-bottom: none;
}

.dataTables_scrollBody {
  border-radius: var(--radius);
}

.dataTables_wrapper .dataTables_scroll {
  clear: both;
}

.input-group {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.input-group .form-control {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group .input-group-btn {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid-2 {
  grid-template-columns: 1fr 1fr;
}

.grid-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.grid-4 {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

.flex {
  display: flex;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: 8px;
}

.gap-3 {
  gap: 12px;
}

.gap-4 {
  gap: 16px;
}

.mt-2 {
  margin-top: 8px;
}

.mt-3 {
  margin-top: 12px;
}

.mt-4 {
  margin-top: 16px;
}

.mb-3 {
  margin-bottom: 12px;
}

.mb-4 {
  margin-bottom: 16px;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.text-sm {
  font-size: 0.85rem;
}

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--text);
}

.overlay {
  display: none;
}

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

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

  .overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
  }

  .overlay.open {
    display: block;
  }

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

  .sidebar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .page-content {
    padding: 16px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .page-content {
    padding: 12px;
  }

  .card-body {
    padding: 12px;
  }
}

.tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
  margin-bottom: 16px;
  list-style: none;
  padding-left: 0;
}

.tab-nav li {
  margin-bottom: -2px;
}

.tab-nav li a {
  display: block;
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}

.tab-nav li a:hover {
  color: var(--text);
}

.tab-nav li.uk-active a {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.uk-tab-left {
  flex-direction: column;
  border-bottom: none;
  border-right: 2px solid var(--border);
}

.uk-tab-left li a {
  border-bottom: none;
  border-right: 2px solid transparent;
}

.uk-tab-left li.uk-active a {
  border-right-color: var(--primary);
}

.search-box {
  position: relative;
}

.search-box .form-control {
  padding-right: 36px;
}

.search-box .search-icon {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.expandable {
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

.expandable.expanded {
  max-width: none;
  white-space: normal;
  word-break: break-all;
}

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  overflow: hidden;
}

.login-header {
  padding: 32px 32px 0;
  text-align: center;
}

.login-header img {
  height: 36px;
  margin-bottom: 8px;
}

.login-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 8px 0 4px;
}

.login-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.login-body {
  padding: 0 32px 32px;
}

.login-body .form-group {
  margin-bottom: 18px;
}

.login-body .form-control {
  padding: 10px 14px;
  font-size: 0.9rem;
}

.login-body .btn {
  width: 100%;
  padding: 10px;
  justify-content: center;
  font-size: 0.9rem;
  margin-top: 8px;
}

.login-footer {
  text-align: center;
  padding: 16px 32px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.login-alert {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
}

.uk-notification-message {
  border-radius: 8px !important;
  font-size: 0.85rem !important;
}

.uk-modal-dialog {
  border-radius: 12px !important;
}

.uk-button {
  border-radius: 6px;
}

.uk-button-primary {
  background: var(--primary);
}

.uk-button-primary:hover {
  background: var(--primary-hover);
}

.uk-select:not(:disabled):focus,
.uk-input:not(:disabled):focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.uk-table {
  font-size: 0.85rem;
}

.uk-table th {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.uk-pagination > * > * {
  border-radius: 6px;
}

.uk-pagination > .uk-active > * {
  background: var(--primary);
}