diff --git a/public/js/app.js b/public/js/app.js
index 1980b38..0791372 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -795,38 +795,8 @@
                 const isAsia = (n) => n.includes('china') || n.includes('hong kong') || n.includes('singapore') || n.includes('korea') || n.includes('seoul') || n.includes('japan') || n.includes('tokyo') || n.includes('shanghai') || n.includes('beijing');
                 const isEurope = (n) => n.includes('germany') || n.includes('uk') || n.includes('france') || n.includes('london') || n.includes('frankfurt') || n.includes('paris') || n.includes('united kingdom');
 
-                // Specific ports for Trans-Pacific routing separation
-                const n = (route.source + ' ' + route.dest).toLowerCase();
-                const involvesSeattle = n.includes('seattle');
-                const involvesLA = n.includes('los angeles') || n.includes('san francisco') || n.includes('la');
-
-                // Determine base curveness to always bend North (Upward) for major East-West routes
-                // In this map: dx < 0 (Westward) -> negative curveness bends North
-                //              dx > 0 (Eastward) -> positive curveness bends North
-                let baseCurve = 0.2;
-                if (dx < 0) baseCurve = -0.2;
-
-                // Special case: Trans-Pacific (US <-> Japan/Asia)
-                if ((isUS(src) && isAsia(dst)) || (isAsia(src) && isUS(dst))) {
-                    if (involvesSeattle) {
-                        baseCurve = (dx < 0 ? -0.45 : 0.45); // High North arc
-                    } else if (involvesLA) {
-                        baseCurve = (dx < 0 ? 0.35 : -0.35);  // South arc (positive for Westward = South)
-                    } else {
-                        baseCurve = (dx < 0 ? -0.3 : 0.3);    // Default slight North arc
-                    }
-                } 
-                // Trans-Atlantic (US <-> Europe)
-                else if ((isUS(src) && isEurope(dst)) || (isEurope(src) && isUS(dst))) {
-                    baseCurve = (dx < 0 ? -0.25 : 0.25);
-                }
-                // Intra-Asia or shorter routes
-                else if (Math.abs(dx) < 50) {
-                    baseCurve = (dx < 0 ? -0.15 : 0.15);
-                }
-
-                // Add variation for multiple lines to same destination
-                const finalCurve = baseCurve + (index * 0.04 * (baseCurve > 0 ? 1 : -1));
+                // Determine base curveness - switched to straight lines (0) per user request
+                let finalCurve = 0;
 
                 finalSeries.push({
                     type: 'lines',