:art: Stylise internal and external links

- Internal links : green
- External links : blue

src/include/css/custom/main.css

@@ -102,10 +102,24 @@ h4 {
 }
 
 /* Link color */
+/* > Internal links */
 main a {
     color: #1e7e34;
 }
 
+main a:hover {
+    color: #004D40;
+}
+
+/* > External links */
+main a[href^="http"] {
+    color: #0056b3;
+}
+
+main a[href^="http"]:hover {
+    color: #0040ff;
+}
+
 /* Footer */
 .footer a {
     color: #1c7430;