diff --git a/public/js/app.js b/public/js/app.js
index bea3dd4..a259e33 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -980,33 +980,22 @@
           const pts = [start, end].slice().sort((a, b) => a[0] - b[0] || a[1] - b[1]);
           const isForward = (start[0] === pts[0][0] && start[1] === pts[0][1]);
 
-          // Geometry metrics for intersection avoidance
-          const dx = end[0] - start[0];
-          const dy = end[1] - start[1];
-          const dist = Math.sqrt(dx * dx + dy * dy);
-          const midLat = (start[1] + end[1]) / 2;
-
-          // 1. Layering: Longer lines curve more to "loop over" shorter lines
-          const baseHeight = 0.15 + Math.min(0.45, dist / 400); 
-
-          // 2. Directionality: Bias curves toward the poles (North or South) to spread out global traffic
-          // Eastward (isForward) + North (midLat > 0) -> + curveness (Left/North)
-          // Westward (!isForward) + North (midLat > 0) -> - curveness (Right/North)
-          const poleDir = (midLat >= 0 ? 1 : -1); 
-          const dirFactor = poleDir * (isForward ? 1 : -1);
-
-          // 3. Jitter: Deterministic hash to avoid perfect overlap of close paths
-          const pathSeed = pts[0][0] + pts[0][1] * 2 + pts[1][0] * 3 + pts[1][1] * 4;
-          const curveJitter = (Math.abs(Math.sin(pathSeed)) * 0.1) - 0.05;
-
-          // Calculate final curveness: layer by distance + spread group + bias toward poles
-          let finalCurve = 0;
-          const step = Math.min(0.2, 0.4 / Math.ceil(count / 2));
-          const magnitude = baseHeight + (Math.floor(i / 2) * step);
-          const spread = (i % 2 === 0) ? magnitude : -magnitude;
+          // Calculate a stable seed for this unique pair of coordinates
+          // This ensures that different paths (e.g., A-B vs C-D) always have slightly different curvatures
+          const pathHash = Math.abs(Math.sin(pts[0][0] * 12.9898 + pts[0][1] * 78.233 + pts[1][0] * 43.123 + pts[1][1] * 21.312));
           
-          // Combining all factors: dirFactor makes i=0 always point toward its respective pole
-          finalCurve = (dirFactor * spread) + curveJitter;
+          // Base curvature: 0.12 - 0.25 (depends on distance and geographical coordinates)
+          const dist = Math.sqrt(Math.pow(end[0] - start[0], 2) + Math.pow(end[1] - start[1], 2));
+          const baseCurve = 0.12 + Math.min(0.08, dist / 1000) + (pathHash * 0.05);
+
+          // Eye-pattern spreading:
+          // A->B and B->A will always take opposite sides of the path.
+          // Multiple connections between the same points will spread outward.
+          const spreadIndex = Math.floor(i / 2);
+          const spreadSign = (i % 2 === 0 ? 1 : -1);
+          const spreadFactor = spreadSign * (1 + spreadIndex * 0.5);
+          
+          const finalCurve = baseCurve * spreadFactor * (isForward ? 1 : -1);
 
           finalSeries.push({
             type: 'lines',