if you want to load CSS from custom files you need to include into : **\Website\Views\Form\Index.cshtml**. This is a content of the file: @using Sitecore.Form.Core.Configuration @using Sitecore.Forms.Mvc @using Sitecore.Forms.Mvc.Html @model Sitecore.Forms.Mvc.ViewModels.FormViewModel @{ ViewContext.ViewData.TemplateInfo.HtmlFieldPrefix = Model.ClientId; var styles = new List<string> { "content/themes/base/all.css", "content/Fields.css" }; var scripts = new List<string> { "libs/jquery/jquery-2.1.3.min.js", "libs/jquery/jquery-ui-1.11.3.min.js", "libs/jquery/jquery.validate.min.js", "libs/jquery/jquery.validate.unobtrusive.min.js", "wffm.min.js", "main.min.js" }; if (Sitecore.Forms.Mvc.Settings.EnableBootstrapCssRendering) { styles.Add("content/bootstrap.min.css"); scripts.Add("libs/bootstrap/bootstrap.min.js"); } } @Html.RenderStyles(styles.Select(s => Constants.ScriptsBaseUrl + s).ToArray()) @Html.RenderStyles(string.Format(StaticSettings.CustomCssPath, string.Empty)) @Html.EditorFor(x => Model) @Html.RenderScripts(scripts.Select(s => Constants.ScriptsBaseUrl + s).ToArray()) You can modify this line to add your custom css file : var styles = new List<string> { "content/themes/base/all.css", "content/Fields.css" };