/* ==========================================================================
   Premium Forms — Apple / Google / Microsoft-grade inputs
   ========================================================================== */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: 0.01em;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  line-height: 1.5;
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* Field with icon + animated border */
.form-field {
  position: relative;
  display: flex;
  align-items: stretch;
  border-radius: var(--radius-lg);
  background: var(--color-bg-elevated);
  transition: box-shadow var(--duration-base) var(--ease-out-expo);
}

.form-field::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(
    135deg,
    rgba(5, 150, 105, 0.5),
    rgba(16, 185, 129, 0.2),
    rgba(251, 191, 36, 0.35),
    rgba(5, 150, 105, 0.5)
  );
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.35;
  pointer-events: none;
  transition: opacity var(--duration-base);
  animation: formBorderFlow 6s linear infinite;
}

.form-field:focus-within::before {
  opacity: 1;
}

.form-field:focus-within {
  box-shadow: 0 0 0 4px rgba(5, 150, 105, 0.12), var(--shadow-md);
}

@keyframes formBorderFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.form-field__icon {
  display: grid;
  place-items: center;
  width: 48px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
}

.form-field:focus-within .form-field__icon {
  color: var(--color-primary);
}

.form-field__icon svg {
  width: 20px;
  height: 20px;
}

.form-input {
  flex: 1;
  width: 100%;
  min-height: 52px;
  padding: 0.875rem 1rem;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  border-radius: var(--radius-lg);
  outline: none;
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  flex: 1;
  width: 100%;
  min-height: 148px;
  padding: 0.875rem 1rem;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  border-radius: var(--radius-lg);
  outline: none;
  resize: vertical;
}

.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-field--textarea {
  align-items: stretch;
}

.form-field--textarea .form-field__icon {
  align-self: flex-start;
  padding-top: 0.875rem;
}

.form-input--plain {
  width: 100%;
  min-height: 52px;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-elevated);
  font-family: inherit;
  font-size: var(--text-base);
  color: var(--color-text);
  transition:
    border-color var(--duration-base),
    box-shadow var(--duration-base);
}

.form-input--plain:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(5, 150, 105, 0.12);
  outline: none;
}

.form-row {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .form-row--2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Checkbox / toggle premium */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

/* Alerts */
.form-alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.5;
  margin-bottom: var(--space-5);
}

.form-alert--error {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #b91c1c;
}

.form-alert--success {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #047857;
}

.form-alert--info {
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.25);
  color: #92400e;
}

/* Secure pay badge */
.pay-secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(5, 150, 105, 0.06), rgba(251, 191, 36, 0.06));
  border: 1px solid rgba(5, 150, 105, 0.15);
  margin-bottom: var(--space-6);
}

.pay-secure svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.pay-secure__text {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.pay-secure__sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}