.center {
  display: block;
  margin: 0px auto;
  text-align: center;
}
.inline-block {
  display: inline-block;
}
.block {
  display: block;
}
.hidden {
  display: none;
}
p.success {
  color: green;
}
p.error {
  color: red;
}
input {
  font-size: 1.5rem;
}
button {
  /* overwrite building blocks settings to display 2-lines button */
  line-height: normal !important;
  text-align: center;
}
input[type='button'] {
  font-size: 2rem;
}