:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #818CF8;
  --secondary: #0EA5E9;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --bg: #F1F5F9;
  --card: #FFFFFF;
  --text: #1E293B;
  --text-secondary: #64748B;
  --border: #E2E8F0;
  --sidebar-bg: #1E293B;
  --sidebar-text: #CBD5E1;
  --sidebar-active: #4F46E5;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
}

/* Login Screen */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  width: 72px;
  height: 72px;
  background: var(--primary);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: white;
  font-size: 28px;
}

.login-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.login-header p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group label i {
  margin-right: 4px;
  color: var(--primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: var(--card);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #059669;
}

.btn-warning {
  background: var(--warning);
  color: white;
}

.btn-warning:hover {
  background: #D97706;
}

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

.btn-danger:hover {
  background: #DC2626;
}

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

.btn-secondary:hover {
  background: #CBD5E1;
}

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

.btn-full {
  width: 100%;
  justify-content: center;
}

.btn-logout {
  background: transparent;
  color: var(--sidebar-text);
  border: 1px solid rgba(255,255,255,0.1);
  width: 100%;
  justify-content: center;
  font-size: 13px;
  padding: 8px;
}

.btn-logout:hover {
  background: rgba(255,255,255,0.1);
  color: white;
}

/* Alert */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-top: 16px;
}

.alert-error {
  background: #FEF2F2;
  color: #DC2626;
  border: 1px solid #FECACA;
}

.alert-success {
  background: #F0FDF4;
  color: #16A34A;
  border: 1px solid #BBF7D0;
}

/* Sidebar */
.main-app {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s;
  z-index: 100;
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  font-weight: 700;
  font-size: 18px;
}

.sidebar-logo i {
  font-size: 22px;
  color: var(--primary-light);
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--sidebar-text);
  font-size: 18px;
  cursor: pointer;
  display: none;
}

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

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255,255,255,0.06);
  color: white;
}

.nav-item.active {
  background: rgba(79,70,229,0.2);
  color: white;
  border-left-color: var(--primary-light);
}

.nav-item i {
  width: 20px;
  text-align: center;
  font-size: 15px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--sidebar-text);
}

.user-info i {
  font-size: 28px;
  color: var(--primary-light);
}

.user-info span {
  font-weight: 600;
  font-size: 14px;
  color: white;
}

.user-info small {
  display: block;
  font-size: 11px;
  opacity: 0.7;
}

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

.topbar {
  background: var(--card);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

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

.topbar-title h2 {
  font-size: 18px;
  font-weight: 700;
}

.topbar-actions {
  margin-left: auto;
}

.current-time {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

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

/* Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: white;
}

.stat-icon.blue { background: linear-gradient(135deg, #667eea, #764ba2); }
.stat-icon.green { background: linear-gradient(135deg, #10B981, #059669); }
.stat-icon.orange { background: linear-gradient(135deg, #F59E0B, #D97706); }
.stat-icon.red { background: linear-gradient(135deg, #EF4444, #DC2626); }
.stat-icon.teal { background: linear-gradient(135deg, #0EA5E9, #0284C7); }

.stat-info h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-info p {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Tables */
.table-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.table-header h3 {
  font-size: 16px;
  font-weight: 700;
}

.table-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

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

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: #F8FAFC;
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tr:hover {
  background: #F8FAFC;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success {
  background: #DCFCE7;
  color: #16A34A;
}

.badge-warning {
  background: #FEF3C7;
  color: #D97706;
}

.badge-danger {
  background: #FEE2E2;
  color: #DC2626;
}

.badge-info {
  background: #DBEAFE;
  color: #2563EB;
}

.badge-purple {
  background: #EDE9FE;
  color: #7C3AED;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.modal-close:hover {
  background: var(--border);
}

.modal-body {
  padding: 24px;
}

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
  }

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

  .mobile-menu-btn {
    display: block;
  }

  .page-content {
    padding: 16px;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .table-header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}

/* Print styles for receipts/invoices */
@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .main-content { margin: 0; }
  .page-content { padding: 0; }
  body { overflow: visible; height: auto; }
}

/* Room grid */
.room-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.room-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.2s;
  border: 2px solid transparent;
}

.room-card:hover {
  transform: translateY(-2px);
}

.room-card.available {
  border-color: var(--success);
}

.room-card.occupied {
  border-color: var(--danger);
}

.room-card .room-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.room-card .room-class {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.room-card .room-price {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

/* Tabs */
.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 20px;
}

.tab-btn {
  padding: 10px 20px;
  border: none;
  background: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: inherit;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Receipt/Invoice */
.receipt {
  background: white;
  padding: 24px;
  border: 1px dashed #ccc;
  font-family: monospace;
}

.receipt h2 {
  text-align: center;
  font-size: 18px;
  margin-bottom: 4px;
}

.receipt .receipt-subtitle {
  text-align: center;
  font-size: 12px;
  color: #666;
  margin-bottom: 16px;
}

.receipt .receipt-line {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 13px;
}

.receipt .receipt-divider {
  border-top: 1px dashed #ccc;
  margin: 8px 0;
}

.receipt .receipt-total {
  font-weight: bold;
  font-size: 14px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.3;
}

.empty-state p {
  font-size: 15px;
}

/* Search and filter */
.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.filter-bar input,
.filter-bar select {
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  min-width: 180px;
}

.filter-bar input:focus,
.filter-bar select:focus {
  outline: none;
  border-color: var(--primary);
}

/* KTP Photo preview */
.ktp-preview {
  width: 100%;
  max-width: 300px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 8px;
}