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

body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #faf8f3;
  color: #2c2c2c;
  min-height: 100vh;
  overflow: hidden;
}

header {
  background: linear-gradient(135deg, #fff8ee 0%, #f0e6cc 100%);
  padding: 1.5rem 2rem;
  text-align: center;
  border-bottom: 2px solid #b8860b;
  position: relative;
  z-index: 10;
}

header h1 {
  font-size: 2rem;
  color: #b8860b;
  margin-bottom: 0.25rem;
}

header p {
  font-size: 0.95rem;
  color: #888;
}

.back-link {
  position: absolute;
  left: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  color: #2563a8;
  text-decoration: none;
  font-size: 0.9rem;
}

.back-link:hover { text-decoration: underline; }

/* Toolbar */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: #fff;
  border-bottom: 1px solid #d4c9b5;
  flex-wrap: wrap;
  gap: 0.75rem;
  z-index: 10;
  position: relative;
}

.search-box {
  display: flex;
  gap: 0.5rem;
}

.search-box input {
  background: #faf8f3;
  border: 1px solid #d4c9b5;
  color: #2c2c2c;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  width: 220px;
}

.search-box input:focus {
  outline: none;
  border-color: #2563a8;
}

.search-box button, .controls button {
  background: #e8e0d0;
  border: 1px solid #d4c9b5;
  color: #2c2c2c;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  white-space: nowrap;
}

.search-box button:hover, .controls button:hover {
  background: #d4c9b5;
}

#clear-btn { color: #f85149; }

.filter-panel {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.filter-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: #888;
  cursor: pointer;
}

.filter-label input[type="checkbox"] {
  accent-color: #b8860b;
}

/* Graph Container */
.graph-container {
  width: 100%;
  height: calc(100vh - 170px);
  position: relative;
  overflow: hidden;
}

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

/* SVG node/edge styles */
.link {
  stroke-opacity: 0.4;
  stroke-width: 1.5;
}

.link-label {
  font-size: 9px;
  fill: #999;
  pointer-events: none;
  text-anchor: middle;
}

.node {
  cursor: grab;
}

.node:active { cursor: grabbing; }

.node-circle {
  stroke: #faf8f3;
  stroke-width: 2.5;
  transition: stroke-width 0.2s;
}

.node-circle:hover {
  stroke-width: 4;
  stroke: #fff;
}

.node-circle.highlighted {
  stroke: #fff;
  stroke-width: 4;
  filter: drop-shadow(0 0 8px rgba(255,255,255,0.5));
}

.node-circle.dimmed {
  opacity: 0.15;
}

.node-label {
  font-size: 11px;
  fill: #2c2c2c;
  pointer-events: none;
  text-anchor: middle;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.node-label.dimmed {
  opacity: 0.1;
}

.link.dimmed {
  opacity: 0.05;
}

.link-label.dimmed {
  opacity: 0.05;
}

/* Legend Panel */
.legend-panel {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(22, 27, 34, 0.95);
  border: 1px solid #d4c9b5;
  border-radius: 8px;
  padding: 1rem;
  min-width: 140px;
  z-index: 5;
  backdrop-filter: blur(4px);
}

.legend-panel h4 {
  color: #b8860b;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
  color: #888;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.legend-panel hr {
  border: none;
  border-top: 1px solid #d4c9b5;
  margin: 0.5rem 0;
}

#graph-stats {
  font-size: 0.8rem;
  color: #888;
  line-height: 1.6;
}

/* Node Detail Popup */
.node-detail {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  border: 1px solid #d4c9b5;
  border-radius: 12px;
  padding: 2rem;
  max-width: 450px;
  max-height: 70vh;
  overflow-y: auto;
  z-index: 100;
  display: none;
  box-shadow: 0 8px 40px rgba(0,0,0,0.15);
}

.node-detail.visible { display: block; }

.detail-close {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  background: none;
  border: none;
  color: #888;
  font-size: 1.5rem;
  cursor: pointer;
}

.detail-close:hover { color: #fff; }

#detail-content h3 {
  color: #b8860b;
  margin-bottom: 0.75rem;
  font-size: 1.2rem;
}

#detail-content p {
  color: #888;
  line-height: 1.7;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

#detail-content .meta {
  font-size: 0.85rem;
  color: #999;
}

#detail-content a.wiki-link {
  display: inline-block;
  margin-top: 1rem;
  color: #2563a8;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 1px solid #2563a8;
  border-radius: 6px;
  font-size: 0.9rem;
}

#detail-content a.wiki-link:hover {
  background: #2563a8;
  color: #faf8f3;
}

#detail-content .connections {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid #d4c9b5;
}

#detail-content .connections h4 {
  color: #2c2c2c;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

#detail-content .connections li {
  color: #888;
  font-size: 0.85rem;
  padding: 0.2rem 0;
  padding-left: 1rem;
  list-style: none;
}

#detail-content .connections li::before {
  content: "→ ";
  color: #b8860b;
}

/* Tooltip */
.tooltip {
  position: fixed;
  background: #f0ebe0;
  border: 1px solid #b8860b;
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  max-width: 250px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 50;
  font-size: 0.85rem;
}

.tooltip.visible { opacity: 1; }

.tooltip .tt-name { color: #b8860b; font-weight: bold; }
.tooltip .tt-type { color: #888; font-size: 0.8rem; }

/* Footer */
footer {
  text-align: center;
  padding: 0.5rem;
  color: #999;
  font-size: 0.75rem;
  background: #faf8f3;
}

/* Responsive */
@media (max-width: 768px) {
  .back-link { position: static; transform: none; display: block; margin-bottom: 0.5rem; }
  header h1 { font-size: 1.5rem; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .filter-panel { justify-content: center; }
  .search-box { justify-content: center; }
  .search-box input { width: 150px; }
  .legend-panel { top: auto; bottom: 10px; }
}