.block.block-simplenews input#edit-subscribe {
    background: #009696 url(../images/subscribe.jpg) no-repeat 10px 7px;
    width: 135px;
    display: block;
    text-indent: -400px;
    overflow: hidden;
}

div#edit-mail-0-value--description {
  text-indent: -9999px;
  line-height: 0; /* Collapse the original line */
}

div#edit-mail-0-value--description::after {
  content: "Fyll i din mailadress";
  text-indent: 0;
  display: block;
  line-height: initial; /* New content takes up original line height */
}

input#edit-unsubscribe {
    background: #009696 url(../images/unsubscribe.png) no-repeat 25px 0px;
    width: 135px;
    display: block;
    text-indent: -400px;
    overflow: hidden;
    border: none;
    margin-top: 10px;
}