Adding stylesheet for the asciidoctor-anywhere-footnote extension.

Author: RayOffiah

src/css/asciidoctor-anywhere-footnote.css

@@ -0,0 +1,13 @@
+.anywhere-footnote {
+  vertical-align: super;
+  font-size: 75%;
+  font-weight: bold;
+  text-decoration: none;
+}
+
+hr.footnote-separator {
+  margin-left: 0;
+  margin-right: auto;
+  margin-bottom: 10px;
+  width: 100px;
+}

src/css/site.css

@@ -34,5 +34,6 @@
 @import "external-link-icon.css";
 @import "disable-callouts.css";
 @import "asciidoctor-external-callout.css";
+@import "asciidoctor-anywhere-footnote.css";
 @import "info-banner.css";
 @import "chatbot.css";