#bg-lt {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%; 
  min-height: 100%;
}

h4{
  display: inline;
  font-weight: 200;
  padding-bottom: 20px;
}
#submit-form-brochure{
  width:240px;
  height:60px;
  background: url("../img_v2/Botón.png");
  background-size: 100% 100%;
  border:0;
}