:root {
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--gray-900);
  background: var(--gray-50);
  margin: 0;
  line-height: 1.6;
}

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

.app-sidebar {
  width: 240px;
  background: white;
  border-right: 1px solid var(--gray-200);
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 0 1.5rem 1.5rem;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 1rem;
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
}

.brand-mark { color: var(--primary); }

.router-status {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.status-dot.status-online { background: var(--success); }
.status-dot.status-offline { background: var(--danger); }
.status-dot.status-unknown { background: var(--gray-400); }

.sidebar-nav { padding: 0 0.75rem; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  color: var(--gray-600);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
}

.nav-link:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.nav-link.active {
  background: var(--primary);
  color: white;
}

.nav-link i { font-size: 1rem; width: 18px; }

.sidebar-footer {
  margin-top: auto;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.app-main {
  flex: 1;
  padding: 2rem;
  overflow-x: hidden;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.page-header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0;
}

.btn {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

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

.btn-secondary {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}
.btn-secondary:hover {
  background: var(--gray-50);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.card-body {
  padding: 1.5rem;
}

.card h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 1.25rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0;
}

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

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table thead th {
  text-align: left;
  padding: 0.75rem;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.8125rem;
}

.table tbody td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--gray-200);
}

.table tbody tr:hover {
  background: var(--gray-50);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-secondary { background: var(--gray-200); color: var(--gray-700); }

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 0.375rem;
}

.form-control, .form-select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  font-size: 0.875rem;
  transition: all 0.15s;
}

.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
}

.alert-danger {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  padding: 1rem;
  min-width: 300px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  animation: slideIn 0.3s ease;
}

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

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }

.htmx-indicator { display: none; }
.htmx-request .htmx-indicator { display: inline-block; }
.htmx-request.htmx-indicator { display: inline-block; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--gray-500);
}

.modal-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--gray-200);
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

@media (max-width: 768px) {
  .app-sidebar {
    position: fixed;
    left: -240px;
    top: 0;
    height: 100vh;
    z-index: 1000;
    transition: left 0.3s;
  }
  
  .app-main {
    padding: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}