body.upgrade-dialog-open { overflow: hidden; }

.upgrade-lightbox-layer {
  position: fixed;
  inset: 0;
  z-index: 1400;
  display: grid;
  place-items: center;
  padding: clamp(16px, 3vw, 34px);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.upgrade-lightbox-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: rgba(21, 33, 38, 0.78);
  backdrop-filter: blur(5px);
  cursor: default;
}

.upgrade-lightbox {
  position: relative;
  z-index: 1;
  width: min(830px, 100%);
  max-height: calc(100dvh - clamp(32px, 6vw, 68px));
  overflow: auto;
  border: 1px solid rgba(8, 118, 109, 0.22);
  border-radius: 28px;
  color: var(--brand-ink);
  background: var(--brand-canvas);
  box-shadow: 0 30px 80px rgba(21, 33, 38, 0.34);
  isolation: isolate;
}

.upgrade-lightbox::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.13;
  background: url("assets/ui/sentence-talk-neural-edge-v1.png") center top / 100% auto no-repeat;
}

.upgrade-lightbox-content {
  width: min(650px, 100%);
  margin: 0 auto;
  padding: clamp(48px, 6vw, 68px) clamp(32px, 7vw, 76px) clamp(30px, 5vw, 50px);
}

.upgrade-lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(21, 33, 38, 0.13);
  border-radius: 50%;
  background: rgba(251, 248, 240, 0.92);
  cursor: pointer;
}

.upgrade-lightbox-close img { width: 23px; height: 23px; }

.upgrade-lightbox-close:hover,
.upgrade-lightbox-close:focus-visible {
  border-color: var(--brand-focus);
  box-shadow: 0 0 0 4px rgba(88, 206, 208, 0.22);
  outline: none;
}

.upgrade-lightbox h2 {
  max-width: 560px;
  margin: 0 0 18px;
  color: var(--brand-ink);
  font-family: "Iowan Old Style", Baskerville, Georgia, serif;
  font-size: clamp(2.35rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.025em;
}

.upgrade-lightbox-lead {
  max-width: 580px;
  margin: 0 0 28px;
  color: var(--brand-ink-soft);
  font-size: clamp(1rem, 2vw, 1.17rem);
  line-height: 1.5;
}

.upgrade-includes h3 {
  margin: 0 0 16px;
  color: var(--brand-ink);
  font-size: 1.03rem;
  line-height: 1.3;
}

.upgrade-includes ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 30px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.upgrade-includes li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--brand-ink-soft);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.35;
}

.upgrade-includes li img { flex: 0 0 auto; width: 20px; height: 20px; }

.upgrade-price-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 30px;
}

.upgrade-price-row strong {
  color: var(--brand-emerald);
  font-family: "Iowan Old Style", Baskerville, Georgia, serif;
  font-size: clamp(2.45rem, 5vw, 3.35rem);
  line-height: 1;
}

.upgrade-price-row span { color: var(--brand-ink); font-size: 1rem; font-weight: 750; }

.upgrade-terms {
  margin: 10px 0 24px;
  color: var(--brand-ink-soft);
  font-size: 0.92rem;
  line-height: 1.45;
}

.upgrade-message {
  margin: 0 0 14px;
  padding: 11px 14px;
  border: 1px solid rgba(8, 118, 109, 0.22);
  border-radius: 12px;
  color: var(--brand-ink-soft);
  background: var(--brand-panel-mint);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.4;
}

.upgrade-message.error { border-color: rgba(21, 33, 38, 0.2); background: var(--brand-canvas); }

.upgrade-checkout-button {
  width: 100%;
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border: 1px solid var(--brand-emerald);
  border-radius: 12px;
  color: var(--brand-action-text);
  background: var(--brand-action);
  box-shadow: 0 14px 30px rgba(8, 118, 109, 0.19);
  font-size: 1.05rem;
  font-weight: 850;
  cursor: pointer;
}

.upgrade-checkout-button:hover:not(:disabled) { background: #06675f; transform: translateY(-1px); }
.upgrade-checkout-button:focus-visible { outline: 3px solid var(--brand-focus); outline-offset: 3px; }
.upgrade-checkout-button:disabled { cursor: wait; opacity: 0.72; transform: none; }

.upgrade-checkout-note {
  max-width: 500px;
  margin: 15px auto 0;
  color: var(--brand-ink-soft);
  font-size: 0.9rem;
  line-height: 1.45;
  text-align: center;
}

.upgrade-checkout-note strong { color: var(--brand-emerald); }

.upgrade-stripe-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(21, 33, 38, 0.13);
  color: var(--brand-ink-soft);
  font-size: 0.88rem;
}

.upgrade-stripe-trust strong { color: var(--brand-ink); font-size: 1.15rem; letter-spacing: -0.04em; }

@media (max-width: 700px) {
  .upgrade-lightbox-layer {
    align-items: end;
    padding: 12px 12px max(12px, env(safe-area-inset-bottom));
  }
  .upgrade-lightbox {
    width: 100%;
    max-height: calc(100dvh - max(24px, env(safe-area-inset-top)));
    border-radius: 24px;
  }
  .upgrade-lightbox-content { padding: 54px 22px 26px; }
  .upgrade-lightbox-close { top: 12px; right: 12px; width: 46px; height: 46px; }
  .upgrade-lightbox h2 { padding-right: 36px; font-size: clamp(2.05rem, 10vw, 3rem); }
  .upgrade-includes ul { grid-template-columns: 1fr; gap: 10px; }
  .upgrade-price-row { margin-top: 24px; }
}

@media (max-width: 360px), (max-height: 650px) {
  .upgrade-lightbox-content { padding: 48px 18px 22px; }
  .upgrade-lightbox-lead { margin-bottom: 18px; }
  .upgrade-includes ul { gap: 8px; }
  .upgrade-price-row { margin-top: 18px; }
  .upgrade-terms { margin-bottom: 16px; }
  .upgrade-checkout-note { font-size: 0.84rem; }
  .upgrade-stripe-trust { margin-top: 16px; padding-top: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .upgrade-checkout-button { transition: none; }
}

/* Embedded Stripe checkout: immediate single-step upgrade flow. */
.upgrade-lightbox {
  width: min(1080px, 100%);
}

.upgrade-lightbox-content {
  width: 100%;
  padding: clamp(42px, 5vw, 62px) clamp(24px, 4vw, 48px) clamp(26px, 4vw, 42px);
}

.upgrade-lightbox-header {
  max-width: 760px;
  margin-bottom: clamp(24px, 3vw, 34px);
}

.upgrade-eyebrow,
.upgrade-payment-heading > div:first-child > span {
  display: block;
  margin: 0 0 8px;
  color: var(--brand-emerald);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  line-height: 1.2;
  text-transform: uppercase;
}

.upgrade-lightbox-grid {
  display: grid;
  grid-template-columns: minmax(270px, 0.8fr) minmax(390px, 1.2fr);
  gap: clamp(22px, 3vw, 38px);
  align-items: start;
}

.upgrade-plan-summary,
.upgrade-payment-panel {
  border: 1px solid rgba(8, 118, 109, 0.17);
  border-radius: 22px;
}

.upgrade-plan-summary {
  padding: clamp(22px, 3vw, 30px);
  background: rgba(232, 244, 239, 0.72);
}

.upgrade-plan-summary .upgrade-price-row { margin-top: 0; }
.upgrade-plan-summary .upgrade-terms { margin-bottom: 25px; }
.upgrade-plan-summary .upgrade-includes ul { grid-template-columns: 1fr; gap: 11px; }

.upgrade-payment-panel {
  min-height: 420px;
  padding: clamp(18px, 3vw, 28px);
  background: rgba(251, 248, 240, 0.95);
  box-shadow: 0 16px 42px rgba(21, 33, 38, 0.08);
}

.upgrade-payment-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.upgrade-payment-heading h3 {
  margin: 0;
  color: var(--brand-ink);
  font-size: 1.15rem;
  line-height: 1.25;
}

.upgrade-payment-heading .upgrade-stripe-trust {
  flex: 0 0 auto;
  margin: 0;
  padding: 0;
  border: 0;
}

.upgrade-checkout-loading {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 50px 0;
}

.upgrade-checkout-loading[hidden] { display: none; }

.upgrade-checkout-loading span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--brand-teal);
  animation: upgrade-loading-pulse 1.1s ease-in-out infinite;
}

.upgrade-checkout-loading span:nth-child(2) { animation-delay: 0.14s; }
.upgrade-checkout-loading span:nth-child(3) { animation-delay: 0.28s; }

.upgrade-embedded-checkout { min-height: 1px; }

.upgrade-payment-note {
  margin: 16px 0 0;
  color: var(--brand-ink-soft);
  font-size: 0.78rem;
  line-height: 1.45;
  text-align: center;
}

.upgrade-success {
  min-height: min(560px, calc(100dvh - 130px));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: 660px;
  margin: 0 auto;
  text-align: center;
}

.upgrade-success-mark {
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 50%;
  background: var(--brand-panel-mint);
  box-shadow: 0 0 0 14px rgba(152, 225, 220, 0.22);
  animation: upgrade-success-arrive 700ms cubic-bezier(.2,.8,.2,1) both;
}

.upgrade-success-mark img { width: 52px; height: 52px; }
.upgrade-success h2 { margin-bottom: 16px; text-align: center; }
.upgrade-success > p:not(.upgrade-eyebrow) { max-width: 520px; margin: 0; color: var(--brand-ink-soft); font-size: 1.05rem; line-height: 1.55; }

.upgrade-success-progress {
  width: min(320px, 76vw);
  height: 6px;
  margin-top: 30px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(8, 118, 109, 0.14);
}

.upgrade-success-progress span {
  display: block;
  width: 42%;
  height: 100%;
  border-radius: inherit;
  background: var(--brand-emerald);
  animation: upgrade-progress 1.25s ease-in-out infinite;
}

.upgrade-success-button {
  min-width: 220px;
  min-height: 56px;
  margin-top: 28px;
  padding: 14px 24px;
  border: 1px solid var(--brand-emerald);
  border-radius: 12px;
  color: var(--brand-canvas);
  background: var(--brand-emerald);
  font-size: 1rem;
  font-weight: 850;
  cursor: pointer;
}

@keyframes upgrade-loading-pulse {
  0%, 100% { opacity: 0.28; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(-5px); }
}

@keyframes upgrade-success-arrive {
  from { opacity: 0; transform: scale(0.72); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes upgrade-progress {
  from { transform: translateX(-110%); }
  to { transform: translateX(340%); }
}

@media (max-width: 820px) {
  .upgrade-lightbox-grid { grid-template-columns: 1fr; }
  .upgrade-plan-summary .upgrade-includes ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  .upgrade-lightbox-layer { padding: 0; }
  .upgrade-lightbox {
    height: 100dvh;
    max-height: 100dvh;
    border: 0;
    border-radius: 0;
  }
  .upgrade-lightbox-content { padding: 58px 16px max(24px, env(safe-area-inset-bottom)); }
  .upgrade-lightbox-header { margin-bottom: 20px; }
  .upgrade-lightbox h2 { font-size: clamp(2rem, 9vw, 2.75rem); }
  .upgrade-lightbox-lead { margin-bottom: 0; }
  .upgrade-payment-panel { order: -1; }
  .upgrade-plan-summary { padding: 18px; }
  .upgrade-plan-summary .upgrade-includes ul { grid-template-columns: 1fr; gap: 9px; }
  .upgrade-payment-panel { min-height: 360px; padding: 17px 12px; }
  .upgrade-payment-heading { padding-inline: 4px; }
  .upgrade-payment-heading .upgrade-stripe-trust span { display: none; }
  .upgrade-success { min-height: calc(100dvh - 100px); }
}

@media (prefers-reduced-motion: reduce) {
  .upgrade-checkout-loading span,
  .upgrade-success-mark,
  .upgrade-success-progress span { animation: none; }
}