diff --git a/css/style.css b/css/style.css
index 66c123d..f6e8b4e 100644
--- a/css/style.css
+++ b/css/style.css
@@ -2,4 +2,24 @@
 @import url(./fontawesome-free-6.4.0-web/css/all.css);
 @import url(./leaftlet.css);
 
-#map { height: 150vh; }
\ No newline at end of file
+#map { height: 100vh;  z-index: 0;}
+
+
+/* The actual timeline (the vertical ruler) */
+.timeline {
+    position: relative;
+    max-width: 1200px;
+    margin: 0 auto;
+  }
+  
+  /* The actual timeline (the vertical ruler) */
+  .timeline::after {
+    content: '';
+    position: absolute;
+    width: 6px;
+    background-color: white;
+    top: 0;
+    bottom: 0;
+    left: 50%;
+    margin-left: -3px;
+  }
\ No newline at end of file