@media only screen and (max-width:618px){
    #task{
        width: 90%;
        margin:auto;
        height: 45px;
    }
}
@media only screen and (max-width:800px){
    .item{
        width: 100%;
    }
}

@media only screen and (max-width:390px){
    .inputitem{
        width: 80%;
    }

}