(function () {
    "use strict";

    var root = document.documentElement;
    var lang = null;
    var theme = null;

    try {
        lang = localStorage.getItem("cursorlang.lang");
        theme = localStorage.getItem("cursorlang.theme");
    } catch (error) {
        // Storage refused: what the markup says stands
    }

    if (!lang && (navigator.language || "").toLowerCase().indexOf("ru") === 0) {
        lang = "ru";
    }

    if (lang === "ru" || lang === "en") {
        root.setAttribute("data-lang", lang);
        root.setAttribute("lang", lang);
    }

    if (theme === "dark" || theme === "light") {
        root.setAttribute("data-theme", theme);
    }
}());