.mx_page_row {
    box-sizing: border-box;
    clear: both;
    display: table;
    margin-bottom: 5px;
    padding-right: 15px;
    width: 100%;
}
.mx_page_row label,
.mx_page_input {
	box-sizing: border-box;
	display: inline-block;
	float: left;
}
.mx_page_row > label {
    width: 40%;
}
.mx_page_input {
    width: 60%;
}

.mx_page_submit {
    margin-left: 40%;
}

@media screen and (max-width: 600px) {

	.mx_page_row > label {
    width: 100%;
}
.mx_page_input {
    width: 100%;
}

.mx_page_submit {
    margin-left: 0;
}

}