:root {
  --bg: #0d1117;
  --bg-2: #11161d;
  --panel: #151b24;
  --panel-2: #1b2330;
  --border: #232c3a;
  --text: #c9d4e0;
  --text-dim: #7d8a9c;
  --accent: #4f8ef7;
  --accent-2: #2de1fc;
  --danger: #ff6b6b;
  --ok: #4ade80;
  --warn: #fbbf24;

  --c-product: #5b8ff9;
  --c-person: #5ad8a6;
  --c-company: #f6bd16;
  --c-vc_firm: #e8684a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

#app {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ---------- Panel ---------- */
#panel {
  width: 320px;
  min-width: 320px;
  height: 100%;
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 14px 14px 30px;
}

#panel::-webkit-scrollbar { width: 8px; }
#panel::-webkit-scrollbar-thumb { background: #2a3547; border-radius: 4px; }
#panel::-webkit-scrollbar-track { background: transparent; }

.brand {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.brand-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #2de1fc, #5b8ff9);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-sub {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

.block {
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
}
.block:last-child { border-bottom: none; }

.block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.block h3 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.muted { color: var(--text-dim); }
.hint { font-size: 12px; }

.text-input {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 7px 9px;
  font-size: 13px;
  margin-bottom: 6px;
  outline: none;
  transition: border-color 0.15s;
}
.text-input:focus { border-color: var(--accent); }
.text-input::placeholder { color: #566273; }

.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: #243042; }
.btn.primary {
  background: linear-gradient(90deg, #2de1fc, #4f8ef7);
  border: none;
  color: #06121e;
  font-weight: 600;
}
.btn.primary:hover { filter: brightness(1.08); }
.btn.block { width: 100%; }

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 12px;
  padding: 0;
}
.link-btn:hover { text-decoration: underline; }

/* ---------- Type filters ---------- */
.type-filters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.type-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  background: var(--bg-2);
  user-select: none;
  font-size: 12px;
}
.type-chip.off { opacity: 0.4; }
.type-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.type-chip .cnt {
  margin-left: auto;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

/* ---------- Node info ---------- */
#node-info .ni-name {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
}
#node-info .ni-id {
  font-size: 11px;
  color: var(--text-dim);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  margin-bottom: 8px;
  word-break: break-all;
}
#node-info .ni-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.ni-badge {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
#node-info .ni-desc {
  font-size: 12px;
  line-height: 1.6;
  color: #aeb9c7;
  margin-bottom: 8px;
}
#node-info .ni-section {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 8px 0 4px;
}
.ni-aliases { display: flex; flex-wrap: wrap; gap: 4px; }
.ni-alias {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 8px;
  background: rgba(79,142,247,0.12);
  color: #9cc0ff;
}
.ni-rels {
  max-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-2);
}
.ni-rels::-webkit-scrollbar { width: 6px; }
.ni-rels::-webkit-scrollbar-thumb { background: #2a3547; border-radius: 3px; }
.ni-rel {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  font-size: 12px;
  border-bottom: 1px solid #1d2533;
  cursor: pointer;
}
.ni-rel:last-child { border-bottom: none; }
.ni-rel:hover { background: #1c2636; }
.ni-rel .rel-type {
  font-size: 10px;
  color: var(--accent-2);
  background: rgba(45,225,252,0.1);
  padding: 1px 5px;
  border-radius: 8px;
  flex-shrink: 0;
}

/* ---------- Path result ---------- */
.path-result {
  margin-top: 8px;
  min-height: 20px;
  font-size: 12px;
  line-height: 1.6;
}
.path-msg { padding: 4px 0; }
.path-msg.ok { color: var(--ok); }
.path-msg.unreachable { color: var(--danger); }
.path-msg.same { color: var(--warn); }
.path-msg.invalid { color: var(--danger); }

.path-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px 4px;
  margin-top: 6px;
}
.path-node {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 12px;
  background: rgba(45,225,252,0.12);
  border: 1px solid rgba(45,225,252,0.4);
  color: #bdeeff;
  font-size: 12px;
  cursor: pointer;
}
.path-node:hover { background: rgba(45,225,252,0.22); }
.path-arrow { color: var(--text-dim); font-size: 11px; }
.path-len {
  color: var(--ok);
  font-size: 11px;
  margin-top: 4px;
}

/* ---------- Stats lists ---------- */
.stats-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: 6px;
  background: var(--bg-2);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 12px;
}
.stat-row:hover { background: #1c2636; border-color: var(--border); }
.stat-row .rank {
  width: 16px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  text-align: right;
  flex-shrink: 0;
}
.stat-row .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stat-row .val {
  color: var(--accent-2);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  flex-shrink: 0;
}
.stat-row .bar {
  height: 4px;
  background: linear-gradient(90deg, #2de1fc, #4f8ef7);
  border-radius: 2px;
  margin-top: 3px;
}
.stat-bar-wrap { flex: 1; min-width: 0; }
.stat-row .type-tag {
  font-size: 10px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.stat-row.highlight { border-color: var(--accent-2); background: #16242e; }

/* ---------- Stage ---------- */
#stage {
  position: relative;
  flex: 1;
  height: 100%;
  background: var(--bg);
  overflow: hidden;
}
#canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}
#canvas.grabbing { cursor: grabbing; }
#canvas.pointer { cursor: pointer; }

.legend {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(17, 22, 29, 0.85);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  pointer-events: none;
}
.legend-row { display: flex; align-items: center; gap: 7px; }

.hint-bar {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(17, 22, 29, 0.7);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 11px;
  color: var(--text-dim);
  pointer-events: none;
}

.loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: var(--bg);
  color: var(--text-dim);
  font-size: 14px;
  z-index: 10;
}
.loading.hidden { display: none; }
.spinner {
  width: 34px;
  height: 34px;
  border: 3px solid #243042;
  border-top-color: var(--accent-2);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }