Fix `css` for `footnotes`

app/javascript/src/application.scss

@@ -125,3 +125,29 @@
 .not-full input {
   width: auto !important;
 }
+
+// Footnotes
+.footnote-x a {
+  font-size:12px; vertical-align: 20%;
+  color: red;
+  font-weight: bold;
+  text-decoration: none;
+}
+
+.footnote-x a.tip span{
+  display: none
+}
+
+.footnote-x a.tip:hover span{
+  border: #c0c0c0 1px dotted;
+  padding: 5px 20px 5px 5px;
+  display: block;
+  z-index: 100;
+  background-color: #87cefa;
+  left: 0px;
+  margin: 10px;
+  width: 250px;
+  position: absolute;
+  top: 10px;
+  text-decoration: none
+}