.form {
  margin-top: 2rem;
  background: var(--clr-white);
  max-width: 600px;
  padding: 2.5rem 3rem;
  border-radius: var(--radius);
}
.form h2 {
  margin-bottom: 2rem;
  text-transform: none;
}
.form-control {
  margin-bottom: 1rem;
}
label {
  display: block;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  color: var(--clr-grey-5);
  font-size: 1.15rem;
  letter-spacing: var(--spacing);
}
input {
  width: 100%;
  background: var(--clr-grey-10);
  border-color: transparent;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  font-size: 1.25rem;
}
.submit-btn {
  width: 100%;
  background: var(--clr-primary-5);
  text-transform: uppercase;
  letter-spacing: var(--spacing);
  border-radius: var(--radius);
  border-color: transparent;
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 1rem;
  color: var(--clr-white);
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  transition: var(--transition);
}
.submit-btn:hover {
  background: var(--clr-primary-3);
}
.alert {
  color: var(--clr-red-dark);
  margin-bottom: 0;
  margin-top: 1rem;
  display: none;
}
.success {
  color: var(--clr-green-dark);
  margin-bottom: 0;
}

.form.loading {
  position: relative;
}
.form.loading::before {
  background: var(--clr-white);
  position: absolute;
  content: '';
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  border-radius: var(--radius);
  opacity: 0.8;
}
@keyframes spinner {
  to {
    transform: rotate(360deg);
  }
}

.form.loading::after {
  content: '';
  position: absolute;
  top: calc(50% - 3rem);
  left: calc(50% - 3rem);
  width: 6rem;
  height: 6rem;
  border-radius: 50%;
  border: 3px solid #ccc;
  border-top-color: var(--clr-primary-5);
  animation: spinner 0.6s linear infinite;
}