In @Ajax.ActionLink html style isn't work MVC, AJAX.ActionLink

i have newxt Ajax.ActionLink

@Ajax.ActionLink(
        "Добавить",
        "CreatPlayer",
        null,
        new AjaxOptions()
        {
            HttpMethod = "GET",
            UpdateTargetId = "view-creating-form",
            InsertionMode = InsertionMode.Replace
        },
        new
        {
            @class = "toggle-tab"
        }
    )

and for him the css styles

css styles.toggle-tab {
    font-family: 'Philosopher', sans-serif;
    font-size: 1.4em;
    color: black;
}

the problem is the styles doesn't work, a take in result usual link style. How fix it and what a problem?Don't see css