/* Light/dark toggle; remembers the choice per browser. */
(function () {
  'use strict';
  var root = document.documentElement;
  function current() {
    if (root.dataset.theme) return root.dataset.theme;
    return window.matchMedia && matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
  }
  document.querySelectorAll('[data-theme-toggle]').forEach(function (btn) {
    btn.addEventListener('click', function () {
      var next = current() === 'dark' ? 'light' : 'dark';
      root.dataset.theme = next;
      try { localStorage.setItem('serubi-theme', next); } catch (e) { /* storage unavailable */ }
      btn.setAttribute('aria-label', next === 'dark' ? 'Ganti ke tema terang' : 'Ganti ke tema gelap');
    });
  });
})();