.sidebar form.sidebar-newsletter {
  float: left;
  width: 100%;
  padding-bottom: 1em;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.sidebar form.sidebar-newsletter .field {
  width: 80%;
  margin: 0;
  float: left;
  border-radius: 0;
  -moz-border-radius: 0;
  -webkit-border-radius: 0;
}
.sidebar form.sidebar-newsletter button.btn {
  width: 20%;
  margin: 0;
  padding: 0;
  padding: 0.4em 0;
  border-radius: 0;
  -moz-border-radius: 0;
  -webkit-border-radius: 0;
}
.sidebar form.sidebar-newsletter button.btn .glyphicons:before {
  margin-right: 0;
  font-size: 18px;
}