Fix diagonal line in top-left — arrow animation now only runs when visible, hidden by default

style.css

@@ -474,9 +474,10 @@ html, body {
   text-shadow: 0 0 6px rgba(248,192,48,.8), 2px 2px 0 rgba(0,0,0,.5);
   pointer-events: none;
   z-index: 50;
-  animation: arrowPulse .7s ease-in-out infinite;
   filter: drop-shadow(0 0 4px rgba(248,192,48,.6));
-  right: 12px;   /* pinned to right edge of map viewport */
+  right: 12px;
+  display: none;
+  bottom: -9999px; /* ensure off-screen when hidden */
 }
 /* NPC lives inside .map-inner, positioned in world-px via JS */
 .map-npc-wrap { position:absolute; text-align:center; z-index: 30; }
@@ -525,7 +526,7 @@ html, body {
   background-position: 0 0;
   image-rendering: pixelated;
   filter: drop-shadow(2px 3px 0 rgba(0,0,0,.4));
-  z-index: 999;
+  z-index: 10;
   font-size: 0;
   color: transparent;
 }