diff --git a/client/src/components/Planner/DayDetailPanel.tsx b/client/src/components/Planner/DayDetailPanel.tsx
index 5449a57..f78b27d 100644
--- a/client/src/components/Planner/DayDetailPanel.tsx
+++ b/client/src/components/Planner/DayDetailPanel.tsx
@@ -148,7 +148,7 @@ export default function DayDetailPanel({ day, days, places, categories = [], tri
   const font = { fontFamily: "-apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif" }
 
   return (
-    <div style={{ position: 'fixed', bottom: 20, left: '50%', transform: 'translateX(-50%)', width: 'min(800px, calc(100vw - 32px))', zIndex: 50, ...font }}>
+    <div style={{ position: 'fixed', bottom: 20, left: `calc(${leftWidth}px + (100vw - ${leftWidth}px - ${rightWidth}px) / 2)`, transform: 'translateX(-50%)', width: `min(800px, calc(100vw - ${leftWidth}px - ${rightWidth}px - 32px))`, zIndex: 50, ...font }}>
       <div style={{
         background: 'var(--bg-elevated)',
         backdropFilter: 'blur(40px) saturate(180%)',