Vertical lines on calendar day screen

epicyon-calendar.css

@@ -116,6 +116,11 @@ a:link {
     padding: 20px;
 }
 
+tr { border: none; }
+td {
+    border-left: solid 2px var(--lines-color);
+}
+
 tr:nth-child(odd) > .calendar__day__cell:nth-child(odd) {
     color: var(--day-number);
 }