/* =============================================================================
   Checkout Page Styles - TASK-017
   Uses semantic tokens from _semantic.css and _primitives.css
   ============================================================================= */

/* -----------------------------------------------------------------------------
   Checkout Layout
   ----------------------------------------------------------------------------- */
.billing-checkout {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.billing-checkout__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
}

.billing-checkout__title {
  font-family: var(--font-display);
  font-size: var(--text-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: 0;
}

.billing-checkout__timer {
  font-size: var(--text-size-lg);
  font-family: var(--font-mono);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  color: var(--text-primary);
}

/* -----------------------------------------------------------------------------
   Order Summary
   ----------------------------------------------------------------------------- */
.billing-order-summary {
  margin: 0;
}

.billing-order-summary__item {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-default);
}

.billing-order-summary__item dt {
  color: var(--text-secondary);
}

.billing-order-summary__item dd {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin: 0;
}

.billing-order-summary__total {
  display: flex;
  justify-content: space-between;
  padding: var(--space-md) 0;
  font-size: var(--text-size-lg);
  font-weight: var(--font-weight-semibold);
}

.billing-order-summary__total dt {
  color: var(--text-primary);
}

.billing-order-summary__total dd {
  color: var(--accent-text);
  margin: 0;
}

.billing-order-summary__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-default);
}

.billing-order-summary__date {
  font-size: var(--text-size-sm);
  color: var(--text-muted);
}

/* -----------------------------------------------------------------------------
   Payment Methods
   ----------------------------------------------------------------------------- */
.billing-payment-methods {
  border: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.billing-payment-method {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.billing-payment-method:hover {
  border-color: var(--accent);
}

.billing-payment-method:has(input:checked) {
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.billing-payment-method--disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.billing-payment-method--disabled:hover {
  border-color: var(--border-default);
}

.billing-payment-method__input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.billing-payment-method__content {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
}

.billing-payment-method__icon {
  color: var(--accent);
  flex-shrink: 0;
}

.billing-payment-method__icon svg {
  width: 24px;
  height: 24px;
}

.billing-payment-method__label {
  flex: 1;
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.billing-payment-method__hint {
  font-size: var(--text-size-sm);
  color: var(--error);
}

/* -----------------------------------------------------------------------------
   Submit Button
   ----------------------------------------------------------------------------- */
.billing-checkout__submit {
  margin-top: var(--space-xl);
}

.billing-checkout__hint {
  text-align: center;
  font-size: var(--text-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-md);
}

/* -----------------------------------------------------------------------------
   Button Styles
   ----------------------------------------------------------------------------- */
.billing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.billing-btn--primary {
  background: var(--accent-text);
  color: #fff;
  border-color: var(--accent-text);
}

.billing-btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.billing-btn--outline {
  background: transparent;
  color: var(--accent-text);
  border-color: var(--accent-text);
}

.billing-btn--outline:hover {
  background: var(--accent-hover);
  color: #fff;
}

.billing-btn--lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-size-lg);
}

.billing-btn--full {
  width: 100%;
}

.billing-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* -----------------------------------------------------------------------------
   Result Pages (Success/Failure)
   ----------------------------------------------------------------------------- */
.billing-result {
  max-width: 500px;
  margin: var(--space-2xl) auto;
  text-align: center;
  padding: var(--space-xl);
}

.billing-result__icon {
  margin-bottom: var(--space-lg);
}

.billing-result__icon svg {
  width: 64px;
  height: 64px;
}

.billing-result--success .billing-result__icon {
  color: var(--success);
}

.billing-result--failure .billing-result__icon {
  color: var(--error);
}

.billing-result__icon--spinner svg {
  animation: billing-spin 1s linear infinite;
  color: var(--accent);
}

.billing-result__title {
  font-family: var(--font-display);
  font-size: var(--text-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.billing-result__message {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.billing-result__details {
  text-align: left;
  margin: 0;
}

.billing-result__detail {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
}

.billing-result__detail:not(:last-child) {
  border-bottom: 1px solid var(--border-default);
}

.billing-result__detail dt {
  color: var(--text-muted);
  font-size: var(--text-size-sm);
}

.billing-result__detail dd {
  margin: 0;
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.billing-result__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* -----------------------------------------------------------------------------
   Alert
   ----------------------------------------------------------------------------- */
.billing-alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.billing-alert--warning {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid var(--warning);
}

.billing-alert--error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error);
}

/* -----------------------------------------------------------------------------
   Processing State
   ----------------------------------------------------------------------------- */
.billing-processing {
  text-align: center;
  padding: var(--space-lg) 0;
}

.billing-processing__status {
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.billing-processing__message {
  color: var(--error);
  font-size: var(--text-size-sm);
}

/* -----------------------------------------------------------------------------
   Animations
   ----------------------------------------------------------------------------- */
@keyframes billing-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* -----------------------------------------------------------------------------
   Error States
   ----------------------------------------------------------------------------- */
.checkout-error {
  text-align: center;
  padding: 2rem;
  max-width: 400px;
  margin: 0 auto;
}

.checkout-error__icon {
  color: var(--error);
  margin-bottom: 1rem;
}

.checkout-error__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.checkout-error__description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.checkout-error__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .checkout-error__actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* -----------------------------------------------------------------------------
   Responsive
   ----------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .billing-checkout {
    padding: var(--space-md);
  }

  .billing-checkout__header {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }

  .billing-checkout__title {
    font-size: var(--text-size-xl);
  }

  .billing-result {
    padding: var(--space-md);
  }
}