(function() {
    var saved = localStorage.getItem('fa_theme');
    var theme = saved || 'light';
    document.documentElement.setAttribute('data-theme', theme);
})();

function toggleTheme() {
    var current = document.documentElement.getAttribute('data-theme');
    var next = current === 'dark' ? 'light' : 'dark';
    document.documentElement.setAttribute('data-theme', next);
    localStorage.setItem('fa_theme', next);
    updateThemeButtons();
}

function updateThemeButtons() {
    var theme = document.documentElement.getAttribute('data-theme');
    var moonSrc = 'imagens/moon-svgrepo-com.svg';
    var sunSrc = 'imagens/sun-svgrepo-com.svg';

    var icons = document.querySelectorAll('.theme-icon');
    for (var i = 0; i < icons.length; i++) {
        icons[i].src = theme === 'dark' ? sunSrc : moonSrc;
        icons[i].alt = theme === 'dark' ? 'Tema Claro' : 'Tema Escuro';
    }

    var btns = document.querySelectorAll('.theme-toggle-btn');
    for (var j = 0; j < btns.length; j++) {
        btns[j].title = theme === 'dark' ? 'Tema Claro' : 'Tema Escuro';
    }
}

if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', updateThemeButtons);
} else {
    updateThemeButtons();
}