(function () {
var key = 'docidava-maintenance-theme';
var root = document.documentElement;
var button = document.querySelector('[data-theme-toggle]');
var media = window.matchMedia ? window.matchMedia('(prefers-color-scheme: dark)') : null;
function read() {
try { return window.localStorage.getItem(key); } catch (error) { return null; }
}
function save(theme) {
try { window.localStorage.setItem(key, theme); } catch (error) { /* storage can be unavailable */ }
}
function apply(theme, persist) {
root.setAttribute('data-theme', theme);
var dark = theme === 'dark';
if (button) {
button.setAttribute('aria-checked', dark ? 'true' : 'false');
button.setAttribute('aria-label', 'Dark theme');
button.setAttribute('title', dark ? 'Switch to light theme' : 'Switch to dark theme');
}
if (persist) save(theme);
}
if (button) {
button.addEventListener('click', function () {
apply(root.getAttribute('data-theme') === 'dark' ? 'light' : 'dark', true);
});
}
if (media && media.addEventListener) {
media.addEventListener('change', function (event) {
if (read() !== 'dark' && read() !== 'light') apply(event.matches ? 'dark' : 'light', false);
});
}
apply(root.getAttribute('data-theme') === 'dark' ? 'dark' : 'light', false);
var year = document.getElementById('year');
if (year) year.textContent = String(new Date().getFullYear());
})();