:root {
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-muted: #6c757d;
  --primary: #4361ee;
  --success: #2ec4b6;
  --warning: #ff9f1c;
  --danger: #e71d36;
  --purple: #7209b7;
  --teal: #0d9488;
  --border: #e0e0e0;
  --radius: 10px;
  --shadow: 0 1px 4px rgba(0,0,0,0.06);
  --sidebar-w: 220px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* App Shell */
#app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: #1a1a2e;
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 200;
}

.sidebar-brand {
  font-size: 22px;
  font-weight: 800;
  padding: 20px 20px 16px;
  color: #fff;
  letter-spacing: 1px;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 8px;
}

.nav-item {
  display: block;
  padding: 10px 14px;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
}

.nav-item:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.nav-item.active {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: rgba(255,255,255,0.7);
}

.logout-btn {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: none;
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: background 0.2s;
}

.logout-btn:hover {
  background: rgba(255,255,255,0.2);
}

/* Main Content */
.app-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 24px;
  max-width: calc(100vw - var(--sidebar-w));
}

/* Pages */
.page { display: none; flex-direction: column; gap: 20px; }
.page.active { display: flex; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
}

/* Period Selector */
.period-selector { display: flex; gap: 4px; }

.period-btn {
  background: #e8ecf4;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.period-btn:hover { background: #dde2ed; }

.period-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 600;
}

/* Stats Cards */
.stats-cards {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

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

.stat-card.blue   { border-left-color: var(--primary); }
.stat-card.green  { border-left-color: var(--success); }
.stat-card.purple { border-left-color: var(--purple); }
.stat-card.orange { border-left-color: var(--warning); }
.stat-card.teal   { border-left-color: var(--teal); }
.stat-card.red    { border-left-color: var(--danger); }

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.stat-value { font-size: 28px; font-weight: 700; }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Tables */
.table-wrap { overflow-x: auto; }

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

th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

td {
  padding: 8px 10px;
  border-bottom: 1px solid #f0f0f0;
}

tr:hover td { background: #f8f9fa; }

/* Stats Detail */
.stats-detail { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.detail-item { display: flex; flex-direction: column; }
.detail-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; }
.detail-value { font-size: 22px; font-weight: 700; }

/* Toolbar */
.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-input {
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  min-width: 200px;
  background: #fff;
  transition: border-color 0.2s;
}

.toolbar-input:focus { border-color: var(--primary); }

.toolbar-select {
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  background: #fff;
  cursor: pointer;
}

/* Buttons */
.btn {
  padding: 8px 18px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #3a50d9; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #28b0a4; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #d11a32; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: #f0f0f0; }

/* Action buttons in tables */
.action-btns { display: flex; gap: 4px; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.badge-green { background: #d1fae5; color: #065f46; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-blue { background: #dbeafe; color: #1e40af; }
.badge-gray { background: #f3f4f6; color: #374151; }
.badge-purple { background: #ede9fe; color: #5b21b6; }

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 0;
}

.pagination button {
  padding: 6px 14px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

.pagination button:hover { background: #f0f0f0; }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination span { font-size: 13px; color: var(--text-muted); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 300;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--card-bg);
  border-radius: 14px;
  width: 90%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  z-index: 301;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

.modal-lg { max-width: 700px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 16px; font-weight: 700; }

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0 4px;
}

.modal form { padding: 20px 24px; }

.modal .form-group { margin-bottom: 14px; }
.modal .form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}

.modal .form-group input,
.modal .form-group textarea,
.modal .form-group select {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  background: #fafafa;
  font-family: inherit;
  transition: border-color 0.2s;
}

.modal .form-group input:focus,
.modal .form-group textarea:focus,
.modal .form-group select:focus {
  border-color: var(--primary);
  background: #fff;
}

.modal .form-group input[type="checkbox"] {
  width: auto;
  margin-right: 6px;
}

.modal .form-group input[type="color"] {
  height: 38px;
  padding: 2px;
  cursor: pointer;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group { flex: 1; }

.modal-footer {
  padding: 14px 0 0;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
  padding-top: 16px;
}

/* Login Page */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
}

.login-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}

.login-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  text-align: center;
  margin-bottom: 4px;
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 28px;
}

.login-error {
  background: #fef2f2;
  color: var(--danger);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  border: 1px solid #fecaca;
}

.login-btn {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.login-btn:hover { background: #3a50d9; }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1a1a2e;
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 400;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  animation: toastIn 0.3s ease;
}

.toast.error { background: var(--danger); }

@keyframes toastIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 1200px) {
  .stats-cards { grid-template-columns: repeat(3, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar-brand { font-size: 14px; padding: 16px 8px; text-align: center; }
  .sidebar-nav { padding: 0 4px; }
  .nav-item { font-size: 11px; padding: 8px 6px; text-align: center; }
  .sidebar-footer { flex-direction: column; gap: 6px; font-size: 11px; padding: 8px; }
  .app-content { margin-left: 60px; padding: 16px; }
  .stats-cards { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; gap: 0; }
  .page-header { flex-direction: column; gap: 10px; align-items: flex-start; }
}