newsletter align the submit button to the right of the input field.

hi,

i'm using your newsletter plugin on my wordpress website. I would like to add a code that aligns the submit button, next to the input field.

this is the code that i have:

.newsletters-form-fields {
    float: left;
    width: 80%;
    padding-right: 0px;
  	padding-left: 0px;
}

.newsletters form .clearfix {
    display: none;
}

.newsletters form {
    overflow: hidden;
}

.newsletters .newsletters_submit {
    margin-top: 30px; 

}

.newsletters .newsletters_submit .form-group {
    margin: 0px;
  padding-right: 0px;
  padding-left: 0px; 
}

.newsletters form div .col-md-6 {
    width: 100%;
  padding-left: 0px;
}

i asked at my theme support forum, but they directed me here because this question is regarding the plugin, not the theme i'm using.

how can i give you access to my private website so u can see what im talking about? this code aligned the submit button next to the plugin, but on the ipad view and the iphone view, the submit button is moved to the bottom. I want the whole thing to stay the same regardless whether the website is viewed on the computer or the iphone.

It seems that the input box shrinks (it adheres to 80% of the screen view), but the button stays the same. the button should shrink do shouldn't it?

thank you for your help