WhatsApp button at bottom of website

whatsapp-button.html

<style>
    .float {
        position: fixed;
        width: 60px;
        height: 60px;
        bottom: 40px;
        right: 40px;
        background-color: #25d366;
        color: #FFF;
        border-radius: 50px;
        text-align: center;
        font-size: 30px;
        box-shadow: 2px 2px 3px #999;
        z-index: 100;
    }

    .my-float {
        height: 40px;
        width: 40px;
    }
</style>
<a href="https://wa.me/919876543210" class="float" target="_blank" rel="noopener noreferrer" alt="Connect with me">
    <img class="my-float" src="whatsapp.png">
</a>