.dialog {
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  padding: 0 10px;
  margin: 0 auto;
}
@media screen and (min-width: 768px) {
  .dialog {
    max-width: 748px;
    padding: 0;
  }
}
@media screen and (min-width: 984px) {
  .dialog {
    max-width: 964px;
  }
}
@media screen and (min-width: 1200px) {
  .dialog {
    max-width: 1080px;
  }
}

.dialog {
  position: relative;
  background: #FFF;
  padding: 20px;
  margin: 20px auto;
  -moz-border-radius: 10px;
  -webkit-border-radius: 10px;
  border-radius: 10px;
}
@media screen and (min-width: 768px) {
  .dialog {
    padding: 40px;
    width: 80%;
  }
}