[SITE CSS] add style for visited links

assets/css/main.css

@@ -26,6 +26,12 @@ a {
   a:active, a:hover, a:focus {
     color: #1f7001; }
 
+main p a {
+  text-decoration: underline; }
+
+main p a:visited {
+  color: #999999; }
+
 blockquote {
   font-size: 1.4em;
   border-left: 4px solid #dddddd;

assets/css/templates/photo.css

@@ -10,6 +10,9 @@ a {
   a:active, a:hover {
     color: #42ef01; }
 
+main p a:visited {
+  color: #cccccc; }
+
 @media (min-width: 544px) {
   nav ul.nav.main {
     color: #fff; } }