orbit plugin override caption styles

Does anyone know how to override the caption styles in the Orbit plugin? I have tried making changes using classes in my theme’s css and for testing purposes tried changing the default and custom stylesheets in the plugin folder. When I modify in chrome I get results but going back to the stylesheet and changing the same classes gets me nowhere. Nothing will budge. Any help is appreciated.
My css:

.orbit-wrapper  {
        padding: 7px 0;
        position: relative;
        width: 100%;
    }

.orbit-caption {
        font-family: Arial, Helvetica, sans-serif;
        position: absolute;
        left: 10px;
        top: 10px;
        text-align: left;
        font-size: 25px !important;
    }