(function () {
    document.querySelectorAll('.content h1, .content h2, .content h3, .content h4, .content h5, .content h6').forEach(function (h) {
        if (!h.id) return;
        var a = document.createElement('a');
        a.href = '#' + h.id;
        a.className = 'heading-anchor';
        a.setAttribute('aria-label', 'Link to this section');
        a.textContent = '§';
        h.insertBefore(a, h.firstChild);
    });
}());