/* Reset and Variables */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent-primary: #3b82f6;
  --accent-success: #22c55e;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --border-color: #333333;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

/* Layout */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

.header-stats {
  display: flex;
  gap: 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-primary);
}

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

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 1rem;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.875rem;
}

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

.nav-item.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.nav-item svg {
  flex-shrink: 0;
}

/* Controls */
.controls {
  margin-top: auto;
}

.controls h3 {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.btn {
  width: 100%;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 0.5rem;
}

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

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

.btn-primary:hover {
  background: #2563eb;
}

.control-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
}

.control-group label {
  font-size: 0.875rem;
}

/* Content Area */
.content {
  flex: 1;
  overflow: auto;
  background: var(--bg-primary);
}

.view {
  display: none;
  height: 100%;
  padding: 2rem;
}

.view.active {
  display: flex;
  flex-direction: column;
}

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

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

.view-controls {
  display: flex;
  gap: 1rem;
}

.view-controls select {
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-primary);
}

/* Graph Container */
.graph-container {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  position: relative;
  overflow: hidden;
}

/* Legend */
.legend {
  display: flex;
  gap: 2rem;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 0.5rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 50%;
}

/* Performance View */
.performance-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  height: 100%;
}

.performance-chart {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
}

.performance-table {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
  overflow: auto;
}

.performance-table h3 {
  margin-bottom: 1rem;
}

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

th, td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Tangles */
.tangles-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.tangle-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
}

.tangle-card h3 {
  margin-bottom: 1rem;
  color: var(--accent-warning);
}

.tangle-complexity {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border-radius: 0.25rem;
}

.tangle-members {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Opportunities */
.opportunities-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.opportunity-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.opportunity-info h4 {
  margin-bottom: 0.5rem;
  color: var(--accent-success);
}

.opportunity-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.opportunity-priority {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.priority-high {
  background: var(--accent-danger);
  color: white;
}

.priority-medium {
  background: var(--accent-warning);
  color: white;
}

/* Status Bar */
.status-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 0.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-danger);
}

.status-indicator.connected {
  background: var(--accent-success);
}

/* Stat Cards */
.stat-card {
  background: var(--bg-tertiary);
  padding: 1rem;
  border-radius: 0.5rem;
  text-align: center;
}

.stat-card h4 {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.persistence-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

/* D3 Styles */
.node {
  cursor: pointer;
}

.node circle {
  stroke: white;
  stroke-width: 2px;
}

.node text {
  font-size: 12px;
  fill: white;
  text-anchor: middle;
  pointer-events: none;
}

.link {
  fill: none;
  stroke: #666;
  stroke-width: 1.5px;
  opacity: 0.6;
}

.link.highlighted {
  stroke: var(--accent-primary);
  stroke-width: 3px;
  opacity: 1;
}

/* Tooltips */
.tooltip {
  position: absolute;
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  font-size: 0.875rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 1000;
}

.tooltip.visible {
  opacity: 1;
}