@namespace url(http://www.w3.org/1999/xhtml); 

@-moz-document regexp(".*/wp-admin.*") {

/* CHANGE GLOBAL FONT */ 

*{ font-family: "Segoe UI", Ariel !important; }

/* CHANGE WRITING FONT */

.mceContentBody * { font-family: "Segoe UI", Ariel !important; }
#editorcontainer #content { font-family: "Segoe UI", Ariel !important; }

/* CHANGE TITLE SIZE */

input#title { font-size: 16px !important; }
}