(!longUrl) { alert("Enter a URL first!"); return; }

    try {
        // Use tinyurl API
        const apiUrl = customCode 
            ? `https://tinyurl.com/api-create.php?url=${encodeURIComponent(longUrl)}&alias=${encodeURIComponent(customCode)}`
            : `https://tinyurl.com/api-create.php?url=${encodeURIComponent(longUrl)}`;
        
        const res = await fetch(apiUrl);
        const shortUrl = await res.text();

        document.getElementById('result').innerHTML = `
            ✅ Your short URL:<br>
            <a href="${shortUrl}" target="_blank">${shortUrl}</a>
            <br><br>
            <button onclick="copyToClipboard('${shortUrl}')">📋 Copy</button>
        `;
    } catch (err) {
        alert("Something went wrong: " + err.message);
    }
}

function copyToClipboard(text) {
    navigator.clipboard.writeText(text).then(() => alert("Copied: " + text));
}
</script>

</body>
</html>