:root {
  --bg-color: #0A0A0B;
  --panel-bg: rgba(255, 255, 255, 0.03);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --accent-color: #8b5cf6;
  --accent-hover: #7c3aed;
  --accent-glow: rgba(139, 92, 246, 0.5);
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  height: 100vh;
  overflow: hidden;
}

/* Glassmorphism Utilities */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
}

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

/* Sidebar */
.sidebar {
  width: 250px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--panel-border);
  border-radius: 0;
}

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

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-color), #ec4899);
  border-radius: 8px;
  box-shadow: 0 0 15px var(--accent-glow);
}

.logo h1 {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-menu {
  padding: 24px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
  width: 100%;
  text-align: left;
}

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

.nav-item.active {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-color);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.sidebar-footer {
  padding: 24px 12px;
  border-top: 1px solid var(--panel-border);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot.connected { background-color: var(--success); box-shadow: 0 0 8px var(--success); }
.dot.disconnected { background-color: var(--danger); box-shadow: 0 0 8px var(--danger); }

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

.topbar {
  height: 80px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--panel-border);
}

.topbar h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

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

.view-section {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.stat-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-card h3 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat-change.positive { color: var(--success); }
.stat-change.negative { color: var(--danger); }

.stat-card.highlight {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.stat-card.highlight .stat-value {
  background: linear-gradient(135deg, var(--accent-color), #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Tables */
.chart-container, .card {
  padding: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

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

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

th, td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--panel-border);
}

th {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.05em;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Buttons & Inputs */
.btn {
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn.primary {
  background: var(--accent-color);
  color: white;
  box-shadow: 0 4px 12px var(--accent-glow);
}

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

.btn.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn.secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.input-group label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

input, select {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal.hidden {
  display: none;
}

.modal-content {
  width: 100%;
  max-width: 400px;
  padding: 32px;
}

.modal-content h2 {
  margin-bottom: 8px;
}

.modal-content p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.text-center { text-align: center; }
.mt-4 { margin-top: 24px; }