Add feedback link; style footnotes

layouts/_default/single.html

@@ -11,4 +11,5 @@
     </div>
     {{ .Content }}
   </article>
+  <p id=feedback>Your polite comments are welcome. <a href="https://twitter.com/messages/compose?recipient_id={{ .Site.Params.AuthorTwitterID }}&text={{ .Title }}:%20">Send me a private message on Twitter.</a></p>
 {{ end }}

static/css/main.css

@@ -38,8 +38,8 @@ a:visited {
 }
 
 #articles .list-date {
-  font-size: 1.2rem;
-  /* border: 1px red solid; */
+  font-size: 1.0rem;
+  text-transform: capitalize;
 }
 
 #articles h2 {
@@ -121,6 +121,31 @@ article h2 {
   margin: 50px 0 15px 0;
 }
 
+hr {
+  border: 1px dotted #aaa;
+
+}
+
+section.footnotes {
+  margin-top: 3rem;
+  font-size: 1.0rem;
+  line-height: 1.5rem;
+}
+
+sup {
+  font-size: 0.9rem;
+}
+
+#feedback {
+  margin-top: 5rem;
+  font-style: italic;
+  font-size: 1.0rem;
+}
+
+#feedback a, #feedback a:visited {
+  text-decoration: underline;
+}
+
 #site-title {
   margin: 0;
   font-size: 3.5rem;