diff --git a/src/components/CalendarView.vue b/src/components/CalendarView.vue
index 09f21cc..7cbbc42 100644
--- a/src/components/CalendarView.vue
+++ b/src/components/CalendarView.vue
@@ -135,6 +135,7 @@ const isWeekColDragging = ref(false)
 let weekColDragStartScroll = 0
 let weekColAccum = 0
 let weekColPointerLocked = false
+let weekColLastY = 0
 
 function scheduleRebuild(reason) {
   if (pendingRebuild) return
@@ -528,6 +529,7 @@ function handleWeekColMouseDown(e) {
   isWeekColDragging.value = true
   weekColDragStartScroll = viewport.value.scrollTop
   weekColAccum = 0
+  weekColLastY = e.clientY
   if (viewport.value.requestPointerLock) viewport.value.requestPointerLock()
   window.addEventListener('mousemove', handleWeekColMouseMove, { passive: false })
   window.addEventListener('mouseup', handleWeekColMouseUp, { passive: false })
@@ -537,11 +539,17 @@ function handleWeekColMouseDown(e) {
 
 function handleWeekColMouseMove(e) {
   if (!isWeekColDragging.value || !viewport.value) return
-  const dy = weekColPointerLocked ? e.movementY : e.clientY // movementY if locked
+  let dy
+  if (weekColPointerLocked) {
+    dy = e.movementY
+  } else {
+    dy = e.clientY - weekColLastY
+    weekColLastY = e.clientY
+  }
   weekColAccum += dy
   let desired = weekColDragStartScroll - weekColAccum
   if (desired < 0) desired = 0
-  const maxScroll = Math.max(0, contentHeight.value - viewportHeight.value)
+  const maxScroll = Math.max(0, contentHeight.value - viewportHeight.vale)
   if (desired > maxScroll) desired = maxScroll
   viewport.value.scrollTop = desired
   e.preventDefault()