@media screen and (max-width: 565px) {
    .picker.picker-dialog {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
    }
    .picker.picker-dialog-content{
        width: 100% !important;
        height: 100% !important;
    }
}