make text selection significantly more visible

TODO: check if this is alright contrast wise, otherwise take a less stylized approach

src/css/style.scss

@@ -14,6 +14,11 @@ a {
   color: $accent;
 }
 
+::selection {
+  background-color: rgba($accent, 0.7);
+  color: #ffb8e8;
+}
+
 .like-a {
   color: $accent;
   text-decoration: underline;