(function () {
    var nav = document.getElementById("cp-nav");
    if (!nav) return;
    var toggle = document.getElementById("cp-nav-toggle");
    var mq = window.matchMedia("(max-width: 51.99rem)");

    function setOpen(open) {
        nav.classList.toggle("is-open", open);
        if (toggle) {
            toggle.setAttribute("aria-expanded", open ? "true" : "false");
            toggle.setAttribute("aria-label", open ? "Fermer le menu" : "Ouvrir le menu");
        }
    }

    if (toggle) {
        toggle.addEventListener("click", function () {
            var next = !nav.classList.contains("is-open");
            setOpen(next);
            if (next) {
                var first = nav.querySelector(".cp-nav-list a");
                if (first) requestAnimationFrame(function () { first.focus(); });
            }
        });
    }

    document.addEventListener("keydown", function (e) {
        if (e.key === "Escape" && nav.classList.contains("is-open")) {
            setOpen(false);
            if (toggle) toggle.focus();
        }
    });

    nav.querySelectorAll(".cp-nav-list a").forEach(function (a) {
        a.addEventListener("click", function () {
            if (mq.matches) setOpen(false);
        });
    });

    mq.addEventListener("change", function (ev) {
        if (!ev.matches) setOpen(false);
    });
})();