/* Cloud Sentinel - Modern Cloud Monitoring Theme */
:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #1f2937;
  --bg-card-hover: #283548;
  --border-color: #374151;
  --border-glow: rgba(56, 189, 248, 0.2);
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --status-healthy: #10b981;
  --status-healthy-bg: rgba(16, 185, 129, 0.15);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-critical: #ef4444;
  --status-critical-bg: rgba(239, 68, 68, 0.15);
  
  --sidebar-width: 250px;
  --header-height: 64px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  overflow-x: hidden;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
}

.brand {
  padding: 20px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  font-size: 22px;
  color: var(--accent-cyan);
}

.brand-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #fff;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-menu {
  list-style: none;
  padding: 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-item:hover {
  background-color: var(--bg-card);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(56, 189, 248, 0.15) 0%, rgba(59, 130, 246, 0.15) 100%);
  color: var(--accent-cyan);
  border-left: 3px solid var(--accent-cyan);
}

.nav-item i {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 11.5px;
  color: var(--text-dim);
}

/* Main Content Area */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Header */
.topbar {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 90;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.badge-pulse {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-healthy-badge {
  background-color: var(--status-healthy-bg);
  color: var(--status-healthy);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.status-healthy-badge .pulse-dot { background-color: var(--status-healthy); }

.status-warning-badge {
  background-color: var(--status-warning-bg);
  color: var(--status-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.status-warning-badge .pulse-dot { background-color: var(--status-warning); }

.status-critical-badge {
  background-color: var(--status-critical-bg);
  color: var(--status-critical);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.status-critical-badge .pulse-dot { background-color: var(--status-critical); }

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Page Container */
.page-container {
  padding: 24px 28px;
  flex: 1;
}

.view-section {
  display: none;
}

.view-section.active {
  display: block;
}

/* Grid & Cards */
.grid-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: rgba(56, 189, 248, 0.3);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-value {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
}

.card-subtext {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.chart-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.chart-container {
  position: relative;
  height: 240px;
  width: 100%;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.data-table th {
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  padding: 12px 16px;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 11.5px;
  letter-spacing: 0.5px;
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  background-color: var(--bg-card);
}

.data-table tr:hover td {
  background-color: var(--bg-card-hover);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #fff;
}
.btn-primary:hover {
  background-color: #2563eb;
}

.btn-danger {
  background-color: var(--status-critical);
  color: #fff;
}
.btn-danger:hover {
  background-color: #dc2626;
}

.btn-warning {
  background-color: var(--status-warning);
  color: #000;
}
.btn-warning:hover {
  background-color: #d97706;
}

.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Simulator Panel */
.simulator-box {
  background: linear-gradient(180deg, rgba(31, 41, 55, 0.8) 0%, rgba(17, 24, 39, 0.9) 100%);
  border: 1px dashed var(--accent-cyan);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 24px;
}

.simulator-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.sim-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Chat Interface */
.chat-window {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  height: 480px;
  display: flex;
  flex-direction: column;
}

.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chat-bubble {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  line-height: 1.6;
}

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

.bubble-user {
  background-color: var(--accent-blue);
  color: #fff;
  align-self: flex-end;
}

.chat-input-bar {
  padding: 14px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
  background-color: var(--bg-secondary);
}

.chat-input {
  flex: 1;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #fff;
  font-size: 13.5px;
}

.chat-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

/* Code & Pre */
pre, code {
  font-family: var(--font-mono);
}

pre {
  background-color: var(--bg-primary);
  padding: 14px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 12.5px;
  border: 1px solid var(--border-color);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .sidebar { width: 70px; }
  .brand-title, .brand-sub, .nav-item span, .sidebar-footer { display: none; }
  .main-wrapper { margin-left: 70px; }
  .charts-grid { grid-template-columns: 1fr; }
}