const root = document.documentElement;
const saved = window?.localStorage?.getItem('theme');
const sysDark = window.matchMedia('(prefers-color-scheme: dark)').matches;

if (saved) {
    root.setAttribute('data-theme', saved);
} else {
    if (sysDark) {
        root.setAttribute('data-theme', 'dark');
    } else {
        root.setAttribute('data-theme', 'light');
    }
}