function dismissNotice() {
    document.getElementById('docs-notice').classList.add('hidden');
}

function showTopic(s, t) {
    document.querySelectorAll('.docs-content article').forEach(a => a.classList.remove('visible'));
    document.querySelectorAll('.docs-sidebar button').forEach(b => b.classList.remove('active'));
    const article = document.getElementById('topic-s' + s + 't' + t);
    const btn = document.querySelector('[data-s="' + s + '"][data-t="' + t + '"]');
    if (article) article.classList.add('visible');
    if (btn) btn.classList.add('active');
    history.replaceState(null, '', '#s' + s + 't' + t);
    document.querySelector('.docs-content').scrollTop = 0;
}

function parseHash() {
    const m = location.hash.match(/^#s(\d+)t(\d+)$/);
    return m ? [parseInt(m[1]), parseInt(m[2])] : [0, 0];
}

document.querySelectorAll('.docs-sidebar button').forEach(btn => {
    btn.addEventListener('click', () => showTopic(+btn.dataset.s, +btn.dataset.t));
});

const [s, t] = parseHash();
showTopic(s, t);
window.addEventListener('hashchange', () => { const [s, t] = parseHash(); showTopic(s, t); });
