:root {
  --bg-main: #0f172a;
  --bg-sidebar: #1e293b;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --border-color: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --emerald: #10b981;
  --amber: #f59e0b;
  --purple: #8b5cf6;
  --rose: #f43f5e;
  --radius: 12px;
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.brand-text h2 {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.brand-text span {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  position: relative;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.nav-item.active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(99, 102, 241, 0.15));
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.nav-item .badge {
  margin-left: auto;
  background: var(--rose);
  color: white;
  font-size: 11px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 10px;
}

.sidebar-footer {
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.system-status {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(16, 185, 129, 0.1);
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-pulse {
  width: 10px;
  height: 10px;
  background: var(--emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--emerald);
}

.system-status strong {
  font-size: 12px;
  display: block;
}

.system-status small {
  font-size: 10px;
  color: var(--emerald);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-main);
}

.top-bar {
  padding: 20px 32px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-title h1 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.page-title p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 3px;
}

.top-actions {
  display: flex;
  gap: 12px;
}

.content-container {
  padding: 32px;
  flex: 1;
  overflow-y: auto;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.2s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

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

.kpi-icon.blue { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.kpi-icon.emerald { background: linear-gradient(135deg, #059669, #10b981); }
.kpi-icon.purple { background: linear-gradient(135deg, #7c3aed, #8b5cf6); }
.kpi-icon.amber { background: linear-gradient(135deg, #d97706, #f59e0b); }

.kpi-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 600;
}

.kpi-data h3 {
  font-size: 26px;
  font-weight: 800;
  margin: 4px 0;
  letter-spacing: -0.5px;
}

.kpi-trend {
  font-size: 11px;
  font-weight: 700;
}

.kpi-trend.positive { color: var(--emerald); }
.kpi-trend.neutral { color: var(--primary); }

/* Alert Banner */
.alert-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(220, 38, 38, 0.15));
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.alert-icon {
  font-size: 20px;
  color: var(--amber);
}

.alert-text {
  flex: 1;
  font-size: 14px;
}

/* Dashboard 2 Col */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
}

/* Panel Card */
.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.panel-header h3 {
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Data Table */
.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  color: var(--text-secondary);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  vertical-align: middle;
}

.data-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.badge-primary { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.badge-purple { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
}

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

.btn-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-primary); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.05); }

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-xs { padding: 4px 8px; font-size: 11px; }

/* Guardrails List */
.guardrail-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guardrail-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.guardrail-icon {
  font-size: 18px;
  color: var(--emerald);
  margin-top: 2px;
}

.guardrail-item strong {
  font-size: 14px;
  display: block;
  margin-bottom: 3px;
}

.guardrail-item p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Sandbox Layout */
.sandbox-container {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 24px;
}

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

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group select, .form-group input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: white;
  border-radius: 8px;
  font-size: 14px;
}

.sandbox-shortcuts {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 20px;
}

.sandbox-chat {
  display: flex;
  flex-direction: column;
  height: 580px;
}

.sandbox-messages {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-input);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 14px;
}

.chat-bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.6;
}

.chat-bubble.assistant {
  align-self: flex-start;
  background: #1e293b;
  border: 1px solid var(--border-color);
}

.chat-bubble.user {
  align-self: flex-end;
  background: var(--primary);
  color: white;
}

.sandbox-input-row {
  display: flex;
  gap: 10px;
}

.sandbox-input-row input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  color: white;
  border-radius: 8px;
  font-size: 14px;
}

.code-block {
  background: #020617;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  font-family: monospace;
  font-size: 13px;
  color: #38bdf8;
  overflow-x: auto;
}

/* Responsive */
@media (max-width: 900px) {
  .app-layout { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .sandbox-container { grid-template-columns: 1fr; }
}