In my attached rte.css stylesheet i wish to set a default font size of 15px but no matter what i do (disabling browser cache etc.) i can't seem to get it working. The rte still uses 10pt Verdana as default.
Is there any other way of doing this? Styling .mceContentBody doesn't seem to have an effect

@charset "utf-8";
// GOOGLE FONT
@import url(http://fonts.googleapis.com/css?family=Titillium+Web:200,300,400,700);

.mceContentBody, body.mceContentBody, body, html {
  color: #000; 
  font-family: "Titillium Web", Arial, sans-serif !important;
  font-size: 15px !important;
  line-height: 1.4em !important;
}

img {
  border: 0;
  max-width: 100%;
  height: auto;

}

a {
    color: #000;
    text-decoration: none;
  }
  a:hover {
    text-decoration: underline;
  }




/* EDITOR PROPERTIES - PLEASE DON'T DELETE THIS LINE TO AVOID DUPLICATE PROPERTIES */
H1 {
  font-family: "Titillium Web", Arial, sans-serif;
  font-size: 38px;
  font-weight: 400;
  line-height: 110%;
  margin: 0px 0px 10px 0px;
  padding: 0px 0px 10px 0px;
  border-bottom: 8px solid #cfe3ec;
}

H2 {
  font-family: "Titillium Web", Arial, sans-serif;
  font-size: 16px;
  font-weight: 200;
  line-height: 140%;
  margin: 0px 0px 0px 0px;
}

H3 {
  font-family: "Titillium Web", Arial, sans-serif;
  font-size: 16px;
  font-weight: 300;
  line-height: 120%;
  margin: 0px 0px 10px 0px;
}

.Standard {
  color: #000; 
  font-family: "Titillium Web", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.4em;

}