document.querySelectorAll('[data-clipboard-text]').forEach(function(btn) {
    btn.addEventListener('click', function() {
        var text = btn.dataset.clipboardText;
        if (navigator.clipboard) {
            navigator.clipboard.writeText(text);
        } else {
            var ta = document.createElement('textarea');
            ta.value = text;
            ta.style.position = 'fixed';
            ta.style.opacity = '0';
            document.body.appendChild(ta);
            ta.select();
            document.execCommand('copy');
            document.body.removeChild(ta);
        }
        var original = btn.textContent;
        btn.textContent = '✓ Copied!';
        btn.disabled = true;
        setTimeout(function() {
            btn.textContent = original;
            btn.disabled = false;
        }, 2000);
    });
});