@media (max-width: 899.98px) {
  .checkout-shell {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .checkout-summary {
    position: static;
  }

  .checkout-perks {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 8px 14px;
  }

  .checkout-qr:not([hidden]) .checkout-facts {
    display: block !important;
    visibility: visible !important;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
  }
}

@media (max-width: 809.98px) {
  /* APEX mobile — cùng quy tắc cho nav + CTA pill */
  .btn-join-nav,
  .btn-primary:not(.btn-primary--block) {
    min-height: 35px;
    padding: 6px 14px;
    font-size: 14px;
  }

  .btn-primary.btn-primary--block {
    min-height: 40px;
    padding: 8px 16px;
    font-size: 14px;
  }

  .btn-ghost {
    min-height: 35px;
    padding: 6px 14px;
    font-size: 14px;
  }

  .nav-cta-row .btn-join-nav,
  .btn-nav-light,
  .btn-nav-dark {
    height: var(--nav-control-h, 32px);
    min-height: var(--nav-control-h, 32px);
    padding-top: 0;
    padding-bottom: 0;
  }

  .btn-nav-light,
  .btn-nav-dark {
    padding-left: 12px;
    padding-right: 12px;
    font-size: 12px;
  }

  .nav-cta-row .btn-join-nav {
    padding-left: 14px;
    padding-right: 14px;
  }

  .btn-nav-light {
    padding-right: 8px;
  }

  .nav-cta-row {
    gap: 8px;
  }

  .value-stack-panel--modules .module-lessons__summary {
    min-height: 28px;
    padding: 4px 10px;
    font-size: 11px;
  }

  .value-stack-panel--modules .module-lessons__chevron {
    width: 12px;
    height: 12px;
  }

  .type-label {
    padding: 6px 14px;
  }
}

@media (max-width: 639px) {
  .sticky-bar {
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 10px;
  }

  .sticky-bar .btn-primary {
    min-width: 0;
    min-height: 35px;
    padding: 6px 12px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .checkout-qr-scan,
  .checkout-spinner {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }

  .sticky-bar {
    transition: none;
  }

  .faq-answer {
    transition: none;
  }

  .faq-icon {
    transition: none;
  }
}