diff --git a/src/renderer/components/Timetable.css b/src/renderer/components/Timetable.css
index 71fb585..aa5b036 100644
--- a/src/renderer/components/Timetable.css
+++ b/src/renderer/components/Timetable.css
@@ -29,24 +29,27 @@
   position: absolute;
   left: 0;
   right: 0;
-  display: flex;
-  align-items: center;
+  height: 0;
   pointer-events: none;
 }
 
 .timetable-hour-label {
+  position: absolute;
+  left: 0;
   width: 44px;
   padding-right: 6px;
   text-align: right;
   font-size: 9.5px;
   color: var(--text-muted);
   letter-spacing: 0.04em;
-  flex-shrink: 0;
   transform: translateY(-50%);
 }
 
 .timetable-hour-line {
-  flex: 1;
+  position: absolute;
+  left: 44px;
+  right: 0;
+  top: 0;
   height: 1px;
   background: var(--border);
 }