.order-form .submit-line {
  position: relative;
}

.order-form .submit-line::before {
  content: "";
  width: 24px;
  height: 24px;
  margin: -12px 0 0 -12px;
  border: 2px solid transparent;
  border-top-color: #fff;
  border-right-color: #fff;
  border-radius: 50%;
  box-sizing: border-box;
  position: absolute;
  top: 50%;
  left: 50%;
  visibility: hidden;
  opacity: 0;
  transition: visibility .2s, opacity .2s;
  animation: spinner .8s linear infinite;
}

.order-form.loading {
  pointer-events: none;
}

.order-form .submit-btn {
  transition: color .2s;
}

.order-form.loading .submit-btn {
  color: transparent;
}

.order-form.loading .submit-line::before {
  visibility: visible;
  opacity: 1;
}

@keyframes spinner {
  0% {
    transform: rotate(0);
  }

  100% {
    transform: rotate(360deg);
  }
}