.natural-form {
  position: relative;
}
.natural-form .form-item {
  display: none;
  margin: 0;
}
.natural-form .form-item.active {
  display: block;
}
.natural-form .nf-button {
  position: absolute;
  top: 0;
  right: 0;
  cursor: pointer;
}
.natural-form .progress-bar {
  height: 3px;
}
.natural-form .progress {
  height: 3px;
  background: #000;
  transition: width 0.3s ease;
  -webkit-transition: width 0.3s ease;
}
.natural-form .progress-current {
  color: #000;
  letter-spacing: 2px;
  text-align: center;
}
.natural-form .form-input-error,
.natural-form .form-errors {
  position: absolute;
  top: 100%;
  margin-top: 10px;
  left: 0;
}