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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f0f2f5;
  --sidebar-bg: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #3b82f6;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  color: #fff;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.logo {
  padding: 20px 16px;
  font-size: 18px;
  font-weight: bold;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  color: var(--sidebar-text);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

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

.nav-item.active {
  background: rgba(59,130,246,0.15);
  color: var(--sidebar-active);
  border-left-color: var(--sidebar-active);
}

.nav-icon {
  margin-right: 10px;
  font-size: 16px;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.version {
  color: var(--sidebar-text);
  font-size: 12px;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

#pageTitle {
  font-size: 20px;
  font-weight: 600;
}

.store-indicator {
  font-size: 13px;
  color: var(--text-secondary);
  background: #f1f5f9;
  padding: 4px 12px;
  border-radius: 12px;
}

.page-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* Pages */
.page { display: none; }
.page.active { display: block; }

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 12px 10px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  text-align: center;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Toolbar */
.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}

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

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

.btn-secondary {
  background: #f1f5f9;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: #e2e8f0;
}

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

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

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.btn-info {
  background: #6366f1;
  color: white;
}
.btn-info:hover {
  background: #4f46e5;
}

.btn-success {
  background: #22c55e;
  color: white;
}
.btn-success:hover {
  background: #16a34a;
}

.btn-warning {
  background: #f59e0b;
  color: white;
}
.btn-warning:hover {
  background: #d97706;
}

/* Form */
.form-group {
  margin-bottom: 14px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group textarea {
  resize: vertical;
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th, .table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.table th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
}

.table tr:hover td {
  background: #f8fafc;
}

.table tr.selected td {
  background: #eff6ff;
}

/* Status badges */
.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; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* Modal */
.modal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  width: 90%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.close-btn {
  position: absolute;
  right: 16px;
  top: 12px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
}

/* Toast */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  z-index: 2000;
  transform: translateX(120%);
  transition: transform 0.3s;
  max-width: 400px;
}

.toast.show {
  transform: translateX(0);
}

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

/* Checkbox override for table */
.table input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

/* Responsive */
/* ===== Login Page ===== */
.login-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.login-overlay.hidden {
  display: none;
}

.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  width: 380px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-card .logo {
  text-align: center;
  font-size: 28px;
  padding: 0 0 8px 0;
  border: none;
}

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

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

.login-card .form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-size: 15px;
  transition: all 0.2s;
}

.login-card .form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
  outline: none;
}

.login-card .btn {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border-radius: 10px;
  font-weight: 600;
}

.login-card .error-msg {
  background: #fef2f2;
  color: #dc2626;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
}

.login-card .error-msg.show {
  display: block;
}

/* ===== User Header (top right) ===== */
.user-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}

.user-info {
  font-size: 13px;
  color: var(--text);
}

.user-info .role-badge {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 8px;
  background: #dbeafe;
  color: #1e40af;
  margin-left: 4px;
}


/* Topbar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 24px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .user-section {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-logout {
  padding: 4px 12px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  color: var(--text-secondary);
}

.btn-logout:hover {
  background: #f1f5f9;
  color: var(--danger);
}

/* ===== Admin / User Management ===== */
.user-list-table td {
  vertical-align: middle;
}

.user-role-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}

.user-role-badge.admin {
  background: #fef3c7;
  color: #92400e;
}

.user-role-badge.student {
  background: #dbeafe;
  color: #1e40af;
}

.user-actions {
  display: flex;
  gap: 4px;
}

.user-actions .btn {
  padding: 3px 8px;
  font-size: 11px;
}

/* ===== Nav Sections ===== */
.nav-section {
  margin-bottom: 4px;
}

.nav-group-label {
  padding: 16px 16px 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--sidebar-text);
  opacity: 0.6;
  letter-spacing: 1px;
}

@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .logo { font-size: 14px; padding: 14px 8px; text-align: center; }
  .nav-item { justify-content: center; padding: 12px 8px; }
  .nav-item .nav-icon { margin-right: 0; }
  .nav-item span:not(.nav-icon) { display: none; }
  .nav-group-label { display: none; }
  .page-body { padding: 16px; }
  .login-card { width: 90%; padding: 24px; }
}

/* ===== Balance Warning & Alerts ===== */
.balance-warning {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 10px 20px;
  font-size: 14px;
  text-align: center;
}
.alert-warning {
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.5;
}
.alert-warning strong {
  color: #78350f;
}

/* ===== Dashboard Charts ===== */
.dashboard-charts .card {
  padding: 14px;
}
.dashboard-charts .card h3 {
  margin: 0 0 8px 0;
  font-size: 14px;
  font-weight: 600;
}
.dashboard-charts .card canvas {
  max-height: 160px;

/* Printer order cards */
.printer-order-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  transition: box-shadow 0.15s;
}
.printer-order-card:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.printer-order-card input[type="checkbox"] {
  cursor: pointer;
}

}