@media only screen and (max-width : 320px) {
    #pincode-field {
        width: 208px!important;
    }
    .signin-popup {
        width: auto !important;
        height: auto !important;
    }
    .existing-text {
        margin-left: 0px !important;
        width: 100% !important;
    }
    #phone-no {
        width: 240px!important;
    }
    .continue-btn {
        width: 240px!important;
    }
}