// 玻璃效果开关：普通半透明（默认）/ 液态玻璃（backdrop-filter 磨砂 + 边缘高光）
// Glass effect toggle: plain translucent (default) / liquid glass (backdrop-filter
// frost + edge highlight), persisted in localStorage
(function () {
  const KEY = 'hearth-glass';

  window.glass = {
    enabled() {
      return localStorage.getItem(KEY) === '1';
    },
    setEnabled(on) {
      localStorage.setItem(KEY, on ? '1' : '0');
      this.apply();
    },
    // 应用开关：写 data-glass 属性，CSS 据此切换 --blur-filter 等变量
    // Apply: set the data-glass attribute; CSS switches --blur-filter etc. from it
    apply() {
      document.documentElement.setAttribute('data-glass', this.enabled() ? 'on' : 'off');
    },
  };

  // 启动即应用（默认关闭 = 普通半透明）
  window.glass.apply();
})();