Refine link styles. (#5278)

livre/style.css

@@ -37,11 +37,12 @@ body {
 a {
 	text-decoration-thickness: 1px;
 	text-underline-offset: 0.25ch;
+	text-decoration-style: dotted;
 }
 
 a:hover,
 a:focus {
-	text-decoration-style: dashed;
+	text-decoration-style: solid;
 }
 
 a:active {