sidebar width

Hey guys! Im trying to change the width of the right sidebar. The theme is easynote https://www.theme-junkie.com/themes/easynote/
I change this but it didnt show any results. THANKS!

* 7. Sidebar
* —————————————————————————–
*/

}
.sidebar {
float: right;
width: 285px;
padding: 30px 0;
}