/**
 * billing.css — Premium billing page styles for Evident ICU
 *
 * Design Excellence Engine applied to the /billing/ page.
 * Glass morphism cards, gemstone accents, golden ratio spacing,
 * conversion-optimized visual hierarchy.
 *
 * Used by: billing.njk, checkout-success.njk
 */

/* ═══════════════════════════════════════════════════════════
   BILLING LAYOUT
   ═══════════════════════════════════════════════════════════ */

.billing-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 2rem);
  max-width: 1200px;
  margin-inline: auto;
  padding: var(--space-lg, 2rem);
}

@media (min-width: 1024px) {
  .billing-layout {
    grid-template-columns: 1fr 1fr;
  }

  .billing-card--wide {
    grid-column: 1 / -1;
  }
}

/* ═══════════════════════════════════════════════════════════
   BILLING CARD — Glass Surface
   ═══════════════════════════════════════════════════════════ */

.billing-card {
  background: var(--glass-surface, color-mix(in oklch, var(--color-surface, oklch(15% 0 0)) 80%, transparent));
  border: 1px solid var(--glass-border, color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 40%, transparent));
  border-radius: var(--radius-lg, 1rem);
  padding: var(--space-lg, 2rem);
  backdrop-filter: blur(12px) saturate(1.2);
  box-shadow:
    0 1px 3px oklch(0% 0 0 / 0.08),
    0 0 0 1px oklch(100% 0 0 / 0.03);
  transition:
    transform 250ms cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 250ms ease,
    border-color 200ms ease;
}

.billing-card:hover {
  border-color: var(--glass-border-hover, color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 60%, transparent));
  box-shadow:
    0 4px 12px oklch(0% 0 0 / 0.12),
    0 0 0 1px oklch(100% 0 0 / 0.05);
}

.billing-card__title {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-block-end: var(--space-md, 1rem);
  color: var(--color-on-surface, oklch(90% 0 0));
}

/* ═══════════════════════════════════════════════════════════
   CURRENT PLAN STATUS
   ═══════════════════════════════════════════════════════════ */

.billing-plan-status {
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 1rem);
}

@media (min-width: 640px) {
  .billing-plan-status {
    flex-direction: row;
    align-items: flex-start;
  }
}

.billing-plan-status__tier {
  flex-shrink: 0;
}

/* Tier badge — gemstone-colored */
.tier-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-full, 9999px);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: capitalize;
}

.tier-badge--lg {
  padding: 0.5rem 1rem;
  font-size: 1rem;
}

.tier-badge--free {
  background: color-mix(in oklch, var(--color-on-surface, oklch(60% 0 0)) 10%, transparent);
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.tier-badge--starter {
  background: color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 15%, transparent);
  color: var(--color-sapphire, oklch(55% 0.18 260));
}

.tier-badge--core {
  background: color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 15%, transparent);
  color: var(--color-emerald, oklch(55% 0.18 160));
}

.tier-badge--complete {
  background: color-mix(in oklch, var(--color-topaz, oklch(65% 0.15 80)) 15%, transparent);
  color: var(--color-topaz, oklch(65% 0.15 80));
}

.tier-badge--team {
  background: color-mix(in oklch, var(--color-amethyst, oklch(55% 0.18 310)) 15%, transparent);
  color: var(--color-amethyst, oklch(55% 0.18 310));
}

.tier-badge--department {
  background: color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 15%, transparent);
  color: var(--color-ruby, oklch(55% 0.2 20));
}

.tier-badge--enterprise {
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 15%, transparent),
    color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 15%, transparent)
  );
  color: var(--color-on-surface, oklch(90% 0 0));
}

/* Definition list — plan details */
.billing-dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem var(--space-md, 1rem);
  font-size: 0.875rem;
  line-height: 1.5;
}

.billing-dl dt {
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  font-weight: 400;
  white-space: nowrap;
}

.billing-dl dd {
  color: var(--color-on-surface, oklch(90% 0 0));
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════
   BILLING ACTIONS
   ═══════════════════════════════════════════════════════════ */

.billing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm, 0.5rem);
  margin-block-start: var(--space-md, 1rem);
}

/* ═══════════════════════════════════════════════════════════
   TRIAL BANNER — Conversion-Critical
   ═══════════════════════════════════════════════════════════ */

.billing-trial-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md, 1rem);
  padding: var(--space-md, 1rem) var(--space-lg, 2rem);
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 10%, transparent),
    color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 5%, transparent)
  );
  border: 1px solid color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 25%, transparent);
  border-radius: var(--radius-md, 0.75rem);
  margin-block-end: var(--space-md, 1rem);
}

.billing-trial-banner__body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.billing-trial-banner__msg {
  font-weight: 600;
  color: var(--color-on-surface, oklch(90% 0 0));
}

.billing-trial-banner__note {
  font-size: 0.8125rem;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.billing-trial-banner__cta {
  flex-shrink: 0;
}

@media (max-width: 639px) {
  .billing-trial-banner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ═══════════════════════════════════════════════════════════
   USAGE METERS
   ═══════════════════════════════════════════════════════════ */

.billing-usage-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.5rem);
}

.billing-usage-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm, 0.5rem);
  padding: 0.5rem 0;
  font-size: 0.875rem;
  border-block-end: 1px solid color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 15%, transparent);
}

.billing-usage-item:last-child {
  border-block-end: none;
}

.billing-usage-item__label {
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  min-width: 0;
}

.billing-usage-item__value {
  color: var(--color-on-surface, oklch(90% 0 0));
  font-weight: 500;
  white-space: nowrap;
}

.billing-usage-item--warn .billing-usage-item__value {
  color: var(--color-topaz, oklch(65% 0.15 80));
}

/* Meter element — native HTML meter with custom styling */
.billing-usage-meter {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: var(--radius-full, 9999px);
  background: color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 20%, transparent);
  grid-column: 1 / -1;
  margin-block-start: 0.25rem;
}

.billing-usage-meter::-webkit-meter-bar {
  background: color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 20%, transparent);
  border-radius: var(--radius-full, 9999px);
  border: none;
  height: 4px;
}

.billing-usage-meter::-webkit-meter-optimum-value {
  background: var(--color-emerald, oklch(55% 0.18 160));
  border-radius: var(--radius-full, 9999px);
}

.billing-usage-meter::-webkit-meter-suboptimum-value {
  background: var(--color-topaz, oklch(65% 0.15 80));
  border-radius: var(--radius-full, 9999px);
}

.billing-usage-meter::-webkit-meter-even-less-good-value {
  background: var(--color-ruby, oklch(55% 0.2 20));
  border-radius: var(--radius-full, 9999px);
}

/* Firefox meter styling */
.billing-usage-meter::-moz-meter-bar {
  background: var(--color-emerald, oklch(55% 0.18 160));
  border-radius: var(--radius-full, 9999px);
}

/* ═══════════════════════════════════════════════════════════
   USAGE WARNINGS
   ═══════════════════════════════════════════════════════════ */

.billing-usage-warnings {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs, 0.25rem);
  margin-block-end: var(--space-sm, 0.5rem);
}

.billing-usage-warning {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm, 0.5rem);
  font-size: 0.8125rem;
  font-weight: 500;
}

.billing-usage-warning--caution {
  background: color-mix(in oklch, var(--color-topaz, oklch(65% 0.15 80)) 10%, transparent);
  color: var(--color-topaz, oklch(65% 0.15 80));
  border: 1px solid color-mix(in oklch, var(--color-topaz, oklch(65% 0.15 80)) 20%, transparent);
}

.billing-usage-warning--critical {
  background: color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 10%, transparent);
  color: var(--color-ruby, oklch(55% 0.2 20));
  border: 1px solid color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 20%, transparent);
}

/* ═══════════════════════════════════════════════════════════
   PLAN GRID — Conversion-Optimized
   ═══════════════════════════════════════════════════════════ */

.billing-plans-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md, 1rem);
  margin-block-start: var(--space-lg, 2rem);
}

@media (min-width: 640px) {
  .billing-plans-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .billing-plans-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Individual plan card in billing grid */
.billing-plan-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.5rem);
  padding: var(--space-lg, 2rem);
  background: var(--glass-surface, color-mix(in oklch, var(--color-surface, oklch(15% 0 0)) 80%, transparent));
  border: 1px solid var(--glass-border, color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 40%, transparent));
  border-radius: var(--radius-md, 0.75rem);
  backdrop-filter: blur(8px);
  transition:
    transform 250ms cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 250ms ease,
    border-color 200ms ease;
}

.billing-plan-card:hover {
  transform: translateY(-3px);
  box-shadow:
    0 4px 12px oklch(0% 0 0 / 0.12),
    0 0 24px color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 6%, transparent);
  border-color: var(--glass-border-hover, color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 60%, transparent));
}

.billing-plan-card--current {
  border-color: color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 30%, transparent);
  box-shadow:
    0 0 24px color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 8%, transparent),
    0 4px 12px oklch(0% 0 0 / 0.12);
}

.billing-plan-card__badge {
  position: absolute;
  top: 0;
  left: 50%;
  translate: -50% -50%;
  padding: 0.25rem 0.75rem;
  background: linear-gradient(135deg, var(--color-sapphire, oklch(55% 0.18 260)), var(--color-emerald, oklch(55% 0.18 160)));
  color: white;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-full, 9999px);
}

.billing-plan-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-on-surface, oklch(90% 0 0));
}

.billing-plan-card__price {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.billing-plan-card__amount {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-on-surface, oklch(90% 0 0));
}

.billing-plan-card__period {
  font-size: 0.8125rem;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.billing-plan-card__free {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.billing-plan-card__desc {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.billing-plan-card__features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.billing-plan-card__features li::before {
  content: "✓";
  color: var(--color-emerald, oklch(55% 0.18 160));
  font-weight: 700;
  margin-inline-end: 0.5rem;
}

/* CTA states */
.billing-plan-cta--current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  background: color-mix(in oklch, var(--color-on-surface, oklch(60% 0 0)) 8%, transparent);
  border-radius: var(--radius-sm, 0.5rem);
  text-align: center;
}

/* ═══════════════════════════════════════════════════════════
   INVOICE TABLE
   ═══════════════════════════════════════════════════════════ */

.billing-invoice-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.billing-invoice-table th {
  text-align: left;
  padding: 0.75rem 0.5rem;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  border-block-end: 1px solid color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 20%, transparent);
}

.billing-invoice-table td {
  padding: 0.75rem 0.5rem;
  border-block-end: 1px solid color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 10%, transparent);
  color: var(--color-on-surface, oklch(90% 0 0));
}

.invoice-status {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full, 9999px);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: capitalize;
}

.invoice-status--paid {
  background: color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 12%, transparent);
  color: var(--color-emerald, oklch(55% 0.18 160));
}

.invoice-status--open {
  background: color-mix(in oklch, var(--color-topaz, oklch(65% 0.15 80)) 12%, transparent);
  color: var(--color-topaz, oklch(65% 0.15 80));
}

.invoice-status--draft {
  background: color-mix(in oklch, var(--color-on-surface-muted, oklch(60% 0 0)) 10%, transparent);
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.invoice-status--void {
  background: color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 10%, transparent);
  color: var(--color-ruby, oklch(55% 0.2 20));
}

.invoice-status--uncollectible {
  background: color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 10%, transparent);
  color: var(--color-ruby, oklch(55% 0.2 20));
}

.billing-invoice-link {
  color: var(--color-sapphire, oklch(55% 0.18 260));
  text-decoration: none;
  font-weight: 500;
  transition: color 150ms ease;
}

.billing-invoice-link:hover {
  color: var(--color-emerald, oklch(55% 0.18 160));
  text-decoration: underline;
}

/* ═══════════════════════════════════════════════════════════
   BILLING NOTES & ALERTS
   ═══════════════════════════════════════════════════════════ */

.billing-note {
  font-size: 0.8125rem;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  padding: var(--space-sm, 0.5rem) 0;
}

.billing-note--error {
  color: var(--color-ruby, oklch(55% 0.2 20));
  font-weight: 500;
}

.billing-overage-note {
  font-size: 0.8125rem;
  color: var(--color-topaz, oklch(65% 0.15 80));
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════
   PAST DUE ALERT
   ═══════════════════════════════════════════════════════════ */

.auth-alert--error {
  background: color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 10%, transparent);
  border: 1px solid color-mix(in oklch, var(--color-ruby, oklch(55% 0.2 20)) 25%, transparent);
  color: var(--color-ruby, oklch(55% 0.2 20));
  border-radius: var(--radius-sm, 0.5rem);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════
   CHECKOUT SUCCESS — Premium Treatment
   ═══════════════════════════════════════════════════════════ */

.checkout-success {
  display: grid;
  place-items: center;
  min-height: 70vh;
  padding: var(--space-xl, 4rem) var(--space-lg, 2rem);
}

.checkout-success__card {
  max-width: 560px;
  width: 100%;
  text-align: center;
  padding: var(--space-xl, 4rem) var(--space-lg, 2rem);
  background: var(--glass-surface, color-mix(in oklch, var(--color-surface, oklch(15% 0 0)) 80%, transparent));
  border: 1px solid var(--glass-border, color-mix(in oklch, var(--color-border, oklch(30% 0 0)) 40%, transparent));
  border-radius: var(--radius-lg, 1rem);
  backdrop-filter: blur(16px) saturate(1.3);
  box-shadow:
    0 12px 40px oklch(0% 0 0 / 0.16),
    0 0 60px color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 6%, transparent);
}

/* Animated check icon */
.checkout-success__icon {
  margin-inline: auto;
  margin-block-end: var(--space-lg, 2rem);
  color: var(--color-emerald, oklch(55% 0.18 160));
}

.checkout-success__circle {
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  animation: check-circle 0.6s cubic-bezier(0.65, 0, 0.45, 1) 0.2s forwards;
}

.checkout-success__check {
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  animation: check-mark 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.6s forwards;
}

@keyframes check-circle {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes check-mark {
  to {
    stroke-dashoffset: 0;
  }
}

.checkout-success__title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-on-surface, oklch(90% 0 0));
  margin-block-end: var(--space-sm, 0.5rem);
}

.checkout-success__tier {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-emerald, oklch(55% 0.18 160));
  margin-block-end: var(--space-md, 1rem);
}

.checkout-success__desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  margin-block-end: var(--space-lg, 2rem);
}

/* Plan details definition list */
.checkout-success__details {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem var(--space-md, 1rem);
  text-align: left;
  padding: var(--space-md, 1rem);
  background: color-mix(in oklch, var(--color-on-surface, oklch(60% 0 0)) 5%, transparent);
  border-radius: var(--radius-sm, 0.5rem);
  margin-block-end: var(--space-lg, 2rem);
  font-size: 0.875rem;
}

.checkout-success__details dt {
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  font-weight: 400;
}

.checkout-success__details dd {
  color: var(--color-on-surface, oklch(90% 0 0));
  font-weight: 500;
}

/* Next steps */
.checkout-success__steps {
  text-align: left;
  margin-block-start: var(--space-md, 1rem);
}

.checkout-success__steps-title {
  font-size: 1rem;
  font-weight: 600;
  margin-block-end: var(--space-sm, 0.5rem);
  color: var(--color-on-surface, oklch(90% 0 0));
}

.checkout-success__step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm, 0.5rem);
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
}

.checkout-success__step-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full, 9999px);
  background: color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 12%, transparent);
  color: var(--color-emerald, oklch(55% 0.18 160));
  font-size: 0.75rem;
  font-weight: 700;
}

/* ═══════════════════════════════════════════════════════════
   UPGRADE PROMPT — Dashboard 402 Pattern
   ═══════════════════════════════════════════════════════════ */

.upgrade-prompt {
  position: fixed;
  bottom: var(--space-lg, 2rem);
  right: var(--space-lg, 2rem);
  z-index: 1000;
  max-width: 380px;
  padding: var(--space-md, 1rem) var(--space-lg, 2rem);
  background: var(--glass-surface, color-mix(in oklch, var(--color-surface, oklch(15% 0 0)) 85%, transparent));
  border: 1px solid color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 25%, transparent);
  border-radius: var(--radius-md, 0.75rem);
  backdrop-filter: blur(16px) saturate(1.3);
  box-shadow:
    0 12px 40px oklch(0% 0 0 / 0.16),
    0 0 30px color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 8%, transparent);
  transform: translateY(120%);
  opacity: 0;
  transition:
    transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1),
    opacity 300ms ease;
  pointer-events: none;
}

.upgrade-prompt.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.upgrade-prompt__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  margin-block-end: var(--space-xs, 0.25rem);
}

.upgrade-prompt__icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm, 0.5rem);
  background: linear-gradient(135deg, var(--color-sapphire, oklch(55% 0.18 260)), var(--color-emerald, oklch(55% 0.18 160)));
  color: white;
  flex-shrink: 0;
}

.upgrade-prompt__title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-on-surface, oklch(90% 0 0));
}

.upgrade-prompt__body {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  margin-block-end: var(--space-md, 1rem);
}

.upgrade-prompt__tier {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full, 9999px);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
  background: color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 15%, transparent);
  color: var(--color-sapphire, oklch(55% 0.18 260));
}

.upgrade-prompt__actions {
  display: flex;
  gap: var(--space-sm, 0.5rem);
  flex-wrap: wrap;
}

.upgrade-prompt__dismiss {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  background: none;
  border: none;
  color: var(--color-on-surface-muted, oklch(60% 0 0));
  cursor: pointer;
  border-radius: var(--radius-full, 9999px);
  transition:
    color 150ms ease,
    background 150ms ease;
  font-size: 1rem;
  line-height: 1;
}

.upgrade-prompt__dismiss:hover {
  color: var(--color-on-surface, oklch(90% 0 0));
  background: color-mix(in oklch, var(--color-on-surface, oklch(60% 0 0)) 10%, transparent);
}

/* ═══════════════════════════════════════════════════════════
   BILLING PRICING TOGGLE (in-page variant)
   ═══════════════════════════════════════════════════════════ */

.billing-pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm, 0.5rem);
  margin-block-end: var(--space-md, 1rem);
}

/* ═══════════════════════════════════════════════════════════
   DARK MODE — Automatic via tokens
   ═══════════════════════════════════════════════════════════ */

@media (prefers-color-scheme: dark) {
  .billing-card {
    box-shadow:
      0 1px 3px oklch(0% 0 0 / 0.2),
      0 0 0 1px oklch(100% 0 0 / 0.04);
  }

  .billing-plan-card:hover {
    box-shadow:
      0 4px 12px oklch(0% 0 0 / 0.25),
      0 0 24px color-mix(in oklch, var(--color-sapphire, oklch(55% 0.18 260)) 8%, transparent);
  }

  .checkout-success__card {
    box-shadow:
      0 12px 40px oklch(0% 0 0 / 0.3),
      0 0 60px color-mix(in oklch, var(--color-emerald, oklch(55% 0.18 160)) 8%, transparent);
  }
}

/* ═══════════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .billing-card,
  .billing-plan-card,
  .upgrade-prompt {
    transition: none;
  }

  .billing-plan-card:hover {
    transform: none;
  }

  .checkout-success__circle,
  .checkout-success__check {
    animation: none;
    stroke-dashoffset: 0;
  }

  .upgrade-prompt {
    transition: opacity 150ms ease;
  }

  .upgrade-prompt.is-visible {
    transform: translateY(0);
  }
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 639px) {
  .billing-layout {
    padding: var(--space-md, 1rem);
  }

  .billing-card {
    padding: var(--space-md, 1rem);
  }

  .billing-plan-card {
    padding: var(--space-md, 1rem);
  }

  .upgrade-prompt {
    left: var(--space-sm, 0.5rem);
    right: var(--space-sm, 0.5rem);
    bottom: var(--space-sm, 0.5rem);
    max-width: none;
  }

  .checkout-success {
    min-height: 50vh;
    padding: var(--space-lg, 2rem) var(--space-md, 1rem);
  }

  .checkout-success__card {
    padding: var(--space-lg, 2rem) var(--space-md, 1rem);
  }
}