.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: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 100;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.float:hover {
    text-decoration: none;
    color: #25d366;
    background-color: #fff;
}

.float:focus {
    outline: 2px solid #25d366;
    outline-offset: 2px;
}

.my-float {
    margin-top: 16px;
}

@media (max-width: 768px) {
    .float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
}