/* ESP32-Web Dashboard — dark theme overrides for Pico CSS */
:root {
  --pico-font-family: system-ui, -apple-system, sans-serif;
}

/* Tab navigation */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--pico-muted-border-color);
  margin-bottom: 1.5rem;
}

.tab-nav a {
  padding: 0.6rem 1.2rem;
  text-decoration: none;
  color: var(--pico-muted-color);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.tab-nav a:hover {
  color: var(--pico-primary);
}

.tab-nav a.active {
  color: var(--pico-primary);
  border-bottom-color: var(--pico-primary);
}

/* Viz containers */
.viz-container {
  position: relative;
  width: 100%;
  min-height: 400px;
}

.viz-container svg {
  width: 100%;
  height: 100%;
}

/* Loading state */
.viz-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  color: var(--pico-muted-color);
}

/* Treemap */
.treemap-cell {
  stroke: var(--pico-background-color);
  stroke-width: 1px;
}

.treemap-label {
  fill: #fff;
  font-size: 11px;
  pointer-events: none;
}

/* Force graph */
.graph-node {
  stroke: var(--pico-background-color);
  stroke-width: 1.5px;
  cursor: grab;
}

.graph-node:active {
  cursor: grabbing;
}

.graph-link {
  stroke: var(--pico-muted-border-color);
  stroke-opacity: 0.5;
}

.graph-label {
  font-size: 10px;
  fill: var(--pico-muted-color);
  pointer-events: none;
}

/* Pack layout */
.cluster-circle {
  stroke: var(--pico-muted-border-color);
  stroke-width: 1px;
  fill-opacity: 0.7;
}

.cluster-label {
  font-size: 11px;
  fill: #fff;
  pointer-events: none;
  text-anchor: middle;
}

/* D3 tooltip */
.d3-tooltip {
  position: absolute;
  padding: 0.5rem 0.75rem;
  background: var(--pico-card-background-color, #1a1a2e);
  border: 1px solid var(--pico-muted-border-color);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--pico-color);
  pointer-events: none;
  z-index: 10;
  max-width: 300px;
}

/* Stats row */
.stats-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.stat-card {
  flex: 1;
  min-width: 120px;
  text-align: center;
  padding: 1rem;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--pico-primary);
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--pico-muted-color);
}

/* Empty state */
.viz-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--pico-muted-color);
  font-style: italic;
}