.top{
    width: 50px;
    height: 50px;
    border-radius: 50px;
    position: fixed;
    bottom: 5%;
    right: 3%;
    background-color: #009fe8;
    cursor: pointer;
    display: none;
    z-index: 999;
}

.top i{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 20px;
}
























/* mobile */
@media screen and (max-width: 767px){
    
    .top{
        width: 35px;
        height: 35px;
        bottom: 10%;
        right: 5%;
    }
    
    .top i{
        font-size: 16px;
    }

}























/* tablet */
@media screen and (min-width: 768px) and (max-width: 1024px){
    
    .top{
        width: 40px;
        height: 40px;
        bottom: 10%;
        right: 5%;
    }
    
    .top i{
        font-size: 18px;
    }

}