:root{--bg:#0f172a;--panel:#1e293b;--panel-2:#273449;--text:#e2e8f0;--muted:#94a3b8;--accent:#6366f1;--danger:#ef4444}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{max-width:1320px;margin:0 auto;padding:20px}.topbar{border-bottom:1px solid #334155;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;padding-bottom:16px;display:flex}h1{letter-spacing:-.02em;margin:0;font-size:26px}.tagline{color:var(--muted);margin:4px 0 0;font-size:14px}select{background:var(--panel);color:var(--text);border:1px solid #475569;border-radius:8px;padding:8px 12px;font-size:14px}.main{grid-template-columns:1fr 340px;gap:16px;display:grid}@media (width<=900px){.main{grid-template-columns:1fr}}.canvas-wrap{background:radial-gradient(circle at 50% 40%,#16233c,#0f172a);border:1px solid #334155;border-radius:12px;overflow:hidden}.graph{width:100%;height:auto;display:block}.node{cursor:pointer}.node:focus{outline:none}.node:hover circle{stroke:#e2e8f0}.node-label{fill:var(--text);pointer-events:none;font-size:11px}.sidebar{background:var(--panel);border:1px solid #334155;border-radius:12px;min-height:640px;padding:16px}.actions{gap:8px;margin-bottom:12px;display:flex}button{background:var(--panel-2);color:var(--text);cursor:pointer;border:1px solid #475569;border-radius:8px;padding:9px 14px;font-size:14px}button:hover{border-color:var(--accent)}button.primary{background:var(--accent);border-color:var(--accent);font-weight:600}h2{margin:12px 0 6px;font-size:16px}h2.danger{color:var(--danger)}.hint{color:var(--muted);font-size:14px;line-height:1.5}.count{color:var(--muted);margin:0 0 8px;font-size:13px}.list{max-height:360px;margin:0;padding-left:18px;overflow:auto}.list li{padding:2px 0;font-size:14px}.depth{color:#fb923c;font-variant-numeric:tabular-nums;width:28px;font-size:12px;display:inline-block}.wave{border-left:2px solid var(--accent);margin:6px 0;padding:4px 0 4px 10px}.wave-label{color:var(--muted);font-size:12px}.wave-services{font-size:14px}.cycle{border:1px solid var(--danger);background:#3f1d1d;border-radius:8px;margin:8px 0;padding:8px 10px;font-size:14px}.error{border:1px solid var(--danger);background:#3f1d1d;border-radius:8px;margin-bottom:10px;padding:8px 10px;font-size:13px}.legend{border-top:1px solid #334155;flex-wrap:wrap;gap:8px 14px;margin-top:18px;padding-top:14px;display:flex}.legend-item{color:var(--muted);align-items:center;gap:6px;font-size:12px;display:inline-flex}.swatch{border-radius:3px;width:12px;height:12px;display:inline-block}