.cms-error .content-in-one h1 {
    font-size: 30px;
}
.custom-add-tocart-custom-order {
    position: absolute;
    z-index: 9;
}
@media only screen and (min-width:320px) and (max-width:767px){
  .content-in-one h1 {
    font-size: 40px;
  }
  .content-in-one span {
    font-size: 40px;
    color: red;
  }
}