/* ===== GRAPH PAGE ===== */
.graph-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 0px);
  overflow: hidden;
}

.graph-header {
  padding: 0.875rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--color-surface);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.graph-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-ink);
}

.graph-subtitle {
  font-size: 0.78rem;
  color: var(--color-muted);
}

.graph-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  flex-wrap: wrap;
}

.graph-filter-label {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-right: 0.25rem;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--color-muted);
}

.filter-btn:hover {
  border-color: currentColor;
}

.filter-btn.active {
  color: var(--color-surface);
}

.filter-btn.active[data-type="core"]     { background: var(--color-core);     border-color: var(--color-core);     }
.filter-btn.active[data-type="practice"] { background: var(--color-practice); border-color: var(--color-practice); }
.filter-btn.active[data-type="metaphor"] { background: var(--color-metaphor); border-color: var(--color-metaphor); }
.filter-btn.active[data-type="event"]    { background: var(--color-event);    border-color: var(--color-event);    }
.filter-btn.active[data-type="person"]   { background: var(--color-person);   border-color: var(--color-person);   }
.filter-btn.active[data-type="work"]     { background: var(--color-work);     border-color: var(--color-work);     }
.filter-btn.active[data-type="overview"] { background: var(--color-overview); border-color: var(--color-overview); }

.graph-zoom-btns {
  display: flex;
  gap: 0.25rem;
}

.zoom-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: all var(--transition);
}

.zoom-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-ink);
}

/* ===== GRAPH CANVAS ===== */
.graph-canvas {
  flex: 1;
  overflow: hidden;
  position: relative;
  background: var(--color-bg);
}

.graph-canvas svg {
  width: 100%;
  height: 100%;
}

/* D3 elements */
.graph-link {
  stroke: var(--color-border);
  stroke-opacity: 0.6;
  stroke-width: 1px;
  fill: none;
}

.graph-link.highlighted {
  stroke: var(--color-gold);
  stroke-opacity: 0.9;
  stroke-width: 2px;
}

.graph-node circle {
  stroke: var(--color-surface);
  stroke-width: 2px;
  cursor: pointer;
  transition: r 0.15s ease;
}

.graph-node circle:hover {
  stroke-width: 3px;
}

.graph-node text {
  font-family: var(--font-sans);
  font-size: 11px;
  fill: var(--color-ink-light);
  pointer-events: none;
  text-anchor: middle;
  dominant-baseline: central;
}

.graph-node.dimmed circle { opacity: 0.2; }
.graph-node.dimmed text { opacity: 0.2; }
.graph-link.dimmed { stroke-opacity: 0.08; }

/* ===== TOOLTIP ===== */
.graph-tooltip {
  position: fixed;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
  font-size: 0.8rem;
  box-shadow: var(--shadow-md);
  pointer-events: none;
  z-index: 200;
  max-width: 220px;
  display: none;
}

.graph-tooltip.visible { display: block; }

.tooltip-title {
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.2rem;
  font-size: 0.85rem;
}

.tooltip-type {
  font-size: 0.7rem;
  margin-bottom: 0.3rem;
}

.tooltip-summary {
  color: var(--color-muted);
  line-height: 1.5;
  font-size: 0.78rem;
}

/* ===== LEGEND ===== */
.graph-legend {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
  font-size: 0.72rem;
  box-shadow: var(--shadow-sm);
}

.legend-title {
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
  font-size: 0.66rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.25rem;
  color: var(--color-ink-light);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.graph-hint {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  font-size: 0.72rem;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.375rem 0.625rem;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
  .graph-header {
    padding: 0.625rem 0.875rem;
  }

  .graph-legend {
    display: none;
  }

  .graph-hint {
    display: none;
  }
}