#firstname input {
max-width: 356px;
-moz-border-radius:50px; 
    -webkit-border-radius: 50px; 
    -khtml-border-radius: 50px;
    border-radius: 50px; 
}

/**---------------- Media query ----------------**/
@media only screen and (max-width: 468px) { 

#firstname input {
width: 340px;
}

.mo-optin-form-container .mo-optin-spinner {
    border-radius: inherit;
    position: absolute;
    width: 100%;
    height: 100%;
    background: #9d162e url(../images/spinner.gif) 50% 50% no-repeat;
        background-image: url("../images/spinner.gif");
    left: 0;
    top: 0;
    opacity: .99;
    filter: alpha(opacity=80);
}