.product-page .premium-offer { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.product-page .premium-offer h1 { margin-bottom: 16px; max-width: 760px; }
.premium-offer-summary { max-width: 650px; color: var(--muted); line-height: 1.75; }
.premium-price { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 18px; margin: 24px 0 18px; }
.premium-price strong { color: var(--ink); font: 800 2.25rem/1.15 var(--sans); letter-spacing: -.045em; }
.premium-price span { color: var(--muted); font-size: .9rem; }
.premium-purchase-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.premium-purchase-actions a { min-height: 48px; }
.premium-resume { display: inline-flex; align-items: center; min-height: 44px; margin-top: 14px; font-size: .9rem; text-underline-offset: 5px; }
.premium-reading-link { margin-top: 18px; }
.premium-reading-link a { display: inline-flex; align-items: center; min-height: 44px; }
.premium-faq details { border-bottom: 1px solid var(--line); padding: 6px 0; }
.premium-faq summary { cursor: pointer; padding: 14px 4px; min-height: 48px; font-weight: 750; line-height: 1.5; }
.premium-faq details p { color: var(--muted); padding: 0 4px 12px; margin: 6px 0; line-height: 1.8; }
.premium-principles { padding: 24px; background: var(--paper); border-left: 3px solid var(--accent-dark); margin-top: 28px; }
.premium-principles h3 { margin-top: 0; }
.premium-principles p { margin-bottom: 0; color: var(--muted); line-height: 1.75; }
.product-page .paid-closing { margin-top: 40px; }
.product-page .paid-closing .premium-price { margin-top: 12px; }
.premium-inquiry-note { margin: 12px 0 0; color: var(--muted); font-size: .9rem; line-height: 1.7; }
.premium-offer .premium-reading-link, .paid-closing .premium-reading-link { margin-top: 8px; }
.premium-offer .premium-resume, .paid-closing .premium-resume { margin-top: 0; }
.product-page a:focus-visible, .product-page summary:focus-visible { outline: 3px solid var(--accent-dark); outline-offset: 4px; }
@media (max-width: 760px) {
  .article.product-page { padding-top: 32px; }
  .product-page .premium-offer h1 { font-size: 32px; line-height: 1.28; }
  .premium-price { margin: 18px 0; }
  .premium-price strong { font-size: 2rem; }
  .premium-purchase-actions { align-items: stretch; }
  .premium-purchase-actions a { flex: 1 1 auto; gap: 10px; }
}
@media (max-width: 430px) {
  .premium-purchase-actions { flex-direction: column; }
  .premium-purchase-actions a { width: 100%; }
  .premium-offer-summary { margin: 12px 0; font-size: .94rem; }
}