/* Layout */
.index-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

.graph-section {
  position: relative;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  height: 70vh;
  min-height: 600px;
  background: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
}

.page-list-section {
  flex: 1;
  padding: 40px 0;
  background: var(--color-bg);
}

/* Graph Container */
#graph-container {
  width: 100%;
  height: 100%;
  cursor: grab;
}

#graph-container:active {
  cursor: grabbing;
}

#graph-container svg {
  width: 100%;
  height: 100%;
}

/* Controls */
.graph-controls {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 10;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  max-width: 600px;
}

.graph-controls input[type="text"] {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  min-width: 200px;
}

.graph-controls input[type="text"]:focus {
  outline: none;
  border-color: var(--color-link);
}

.graph-controls select {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  cursor: pointer;
}

.graph-controls select:focus {
  outline: none;
  border-color: var(--color-link);
}

.graph-controls button {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.graph-controls button:hover {
  background: var(--color-border);
}

.graph-controls label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}

.graph-controls input[type="checkbox"] {
  cursor: pointer;
}

.graph-tag-legend {
  position: absolute;
  right: 16px;
  bottom: 16px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  max-width: 180px;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(6px);
}

.graph-tag-legend-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.graph-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text);
  font-size: 11px;
  line-height: 1.2;
}

.graph-tag-item-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  flex-shrink: 0;
}

.graph-tag-item-name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.graph-tag-item-count {
  color: var(--color-text-secondary);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

/* Graph Elements */
.graph-link {
  stroke: var(--color-text-secondary);
  stroke-opacity: 0.7;
  stroke-width: 1.5px;
  fill: none;
}

.graph-link.embed {
  stroke-dasharray: 4 2;
}

.graph-node {
  cursor: pointer;
  transition: r 0.2s, stroke-width 0.2s;
  stroke: var(--color-bg);
  stroke-width: 1px;
}

.graph-node:hover {
  stroke: var(--color-text);
  stroke-width: 2px;
}

.graph-node.orphan {
  opacity: 0.5;
  stroke: var(--color-text-secondary);
  stroke-width: 1px;
  stroke-dasharray: 2 2;
}

.graph-node.highlighted {
  stroke: var(--color-text);
  stroke-width: 3px;
}

.graph-node-label {
  font-size: 11px;
  font-weight: 600;
  fill: var(--color-text);
  paint-order: stroke;
  stroke: var(--color-bg);
  stroke-width: 4px;
  pointer-events: none;
  user-select: none;
}

/* Tooltip */
.graph-tooltip {
  position: absolute;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-width: 250px;
}

.graph-tooltip.visible {
  opacity: 1;
}

.graph-tooltip h4 {
  margin: 0 0 4px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.graph-tooltip .tooltip-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.graph-tooltip .tooltip-tag {
  display: inline-block;
  padding: 2px 6px;
  background: var(--color-border);
  border-radius: 4px;
  font-size: 10px;
  color: var(--color-text);
}

/* Responsive */
@media (max-width: 768px) {
  .graph-section {
    height: 50vh;
    min-height: 400px;
  }

  .graph-controls {
    flex-direction: column;
    align-items: stretch;
    max-width: none;
    left: 10px;
    right: 10px;
  }

  .graph-tag-legend {
    position: static;
    align-items: flex-start;
    max-width: none;
    margin: 88px 10px 0;
  }

  .graph-controls input[type="text"] {
    min-width: 100%;
  }

  .page-list-section {
    padding: 20px 0;
  }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
  .graph-link {
    stroke-opacity: 0.55;
  }

  .graph-tooltip,
  .graph-controls input,
  .graph-controls select,
  .graph-controls button,
  .graph-controls label {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }
}