Add active state to links

src/static/css/main.css

@@ -12,6 +12,7 @@
 	--bg-00: #000000;
 	--bg-01: #efefef;
 	--bg-02: #dedede;
+	--bg-03: #bebebe;
 
 	--link: #0000ccde;
 
@@ -133,6 +134,9 @@ li {padding-left: calc(var(--gap) / 2)}
 	background: var(--bg-02);
 	text-decoration: none;
 }
+.link-block > a:active{
+	background: var(--bg-03);
+}
 .link-block > a:hover > span.desc {
 	text-decoration: underline;
 }