(function(){
  var d=document.documentElement,stored=localStorage.getItem('hermes-theme');
  var params=new URLSearchParams(location.search);
  var force=params.get('theme')||stored||'light';
  function apply(){if(d.getAttribute('data-theme')!==force)d.setAttribute('data-theme',force);}
  apply();
  new MutationObserver(function(m){m.forEach(function(x){if(x.attributeName==='data-theme')apply();})}).observe(d,{attributes:true});
  setInterval(apply,300);
  window._toggleTheme=function(){
    force=force==='dark'?'light':'dark';
    localStorage.setItem('hermes-theme',force);
    apply();
  };
})();