.billing-page {
  min-height: calc(100vh - 68px);
  padding: clamp(3rem, 8vw, 6rem) 1rem;
  background: linear-gradient(180deg, #f7f7fb 0%, #fff 65%);
}

.billing-hero { width: min(720px, 100%); margin: 0 auto 3rem; text-align: center; }
.billing-hero > p:not(.eyebrow) { color: var(--muted); font-size: 1.05rem; }
.billing-currency { display: flex; align-items: center; justify-content: center; gap: 0.7rem; margin: 1.5rem 0; }
.billing-currency label { color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.billing-currency select { min-height: 40px; padding: 0.45rem 0.75rem; border: 1px solid var(--border); border-radius: 8px; background: white; color: var(--brand-blue); font-weight: 700; }

.billing-plan-grid { display: grid; width: min(800px, 100%); margin: 0 auto; gap: 1.25rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.billing-plan-card { padding: clamp(1.5rem, 5vw, 2.5rem); border: 1px solid var(--border); border-top: 4px solid var(--brand-gold); border-radius: var(--radius); background: white; box-shadow: var(--shadow); text-align: center; }
.billing-plan-card h2 { font-family: Helvetica, Arial, sans-serif; font-style: normal; font-weight: 700; }
.billing-plan-card__original-price { margin: 0; color: var(--muted); }
.billing-plan-card__coupon { min-height: 2.5rem; color: var(--brand-blue); font-weight: 700; }
.billing-plan-card form { margin-top: 1.5rem; }
.billing-plan-card .button:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.billing-current { display: flex; align-items: center; justify-content: space-between; width: min(800px, 100%); margin: 0 auto 1.25rem; padding: 1.25rem 1.5rem; border: 1px solid var(--brand-gold); border-radius: var(--radius); background: #fffaf4; gap: 1rem; }
.billing-current h2 { margin: 0; font-size: 1.7rem; }
.billing-current p { margin: 0.35rem 0 0; color: var(--muted); }
.billing-empty { width: min(680px, 100%); margin: 2rem auto; color: var(--muted); text-align: center; }
.billing-review { display: block; background: white; }
.billing-review dl { display: grid; margin: 0; }
.billing-review dl div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.8rem 0; border-bottom: 1px solid var(--border); }
.billing-review dt { color: var(--muted); font-weight: 700; }
.billing-review dd { margin: 0; text-align: right; }
.billing-review__form { width: min(800px, 100%); margin: 1.25rem auto; padding: 1.25rem 1.5rem; border: 1px solid var(--border); border-radius: var(--radius); background: white; }
.billing-review__form .checkbox-field { margin-bottom: 1rem; }
.billing-page > .text-link { display: block; width: min(800px, 100%); margin: 0 auto; }
.button--disabled { opacity: 0.45; }

.billing-page--purchase { padding-top: clamp(2rem, 6vw, 4.5rem); }
.purchase-checkout { width: min(860px, 100%); margin: 0 auto 1.25rem; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: white; box-shadow: var(--shadow); }
.purchase-checkout__summary { display: grid; align-items: center; padding: clamp(1.5rem, 5vw, 3rem); gap: clamp(1.5rem, 5vw, 3rem); grid-template-columns: minmax(140px, 190px) minmax(0, 1fr); }
.purchase-checkout__cover { display: block; width: 100%; aspect-ratio: 9 / 13; border-radius: 8px; box-shadow: 0 14px 30px rgba(4, 14, 133, 0.18); object-fit: cover; }
.purchase-checkout__title { margin: 0.25rem 0 0.75rem; }
.purchase-checkout__description { max-width: 52ch; margin: 0; color: var(--muted); }
.purchase-checkout__price { margin-top: 1.5rem; padding: 1rem 1.25rem; border-left: 4px solid var(--brand-gold); border-radius: 8px; background: #f7f7fb; }
.purchase-checkout__price span, .purchase-checkout__price strong { display: block; }
.purchase-checkout__price span { margin-bottom: 0.2rem; color: var(--muted); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }
.purchase-checkout__price strong { color: var(--brand-blue); font-size: clamp(1.8rem, 5vw, 2.5rem); line-height: 1.1; }
.purchase-checkout__form { width: auto; margin: 0; padding: clamp(1.25rem, 4vw, 2rem) clamp(1.5rem, 5vw, 3rem); border: 0; border-top: 1px solid var(--border); border-radius: 0; background: #fbfbfd; }
.purchase-checkout__legal-note { display: grid; margin-bottom: 1rem; padding: 0.9rem 1rem; border-radius: 8px; background: white; color: var(--muted); font-size: 0.82rem; gap: 0.75rem; line-height: 1.45; }
.purchase-checkout__legal-note p { margin: 0; }
.purchase-checkout__legal-note strong { display: block; margin-bottom: 0.1rem; color: #5d5f6b; font-size: 0.78rem; }
.purchase-checkout__form .checkbox-field { padding: 0.75rem 0; }
.billing-page--purchase > .text-link { width: min(860px, 100%); }

.billing-book-offer { display: block; }
.billing-book-offer .billing-currency { justify-content: flex-start; margin: 1rem 0; }
.billing-book-offer__price { margin: 0.8rem 0 1rem; color: var(--brand-blue) !important; font-size: 1.7rem; font-weight: 700; }
.billing-price--discounted { display: flex; align-items: baseline; gap: 0.65rem; }
.billing-price--discounted del { color: var(--muted); font-size: 1rem; font-weight: 400; }
.billing-book-offer__plans { display: inline-block; margin-top: 1rem; }

.billing-coupon { display: flex; align-items: end; justify-content: space-between; width: min(800px, 100%); margin: 0 auto 1.25rem; padding: 1rem; border: 1px solid var(--brand-gold); border-radius: 10px; background: #fffaf4; gap: 1rem; }
.billing-plan-grid + .billing-coupon { margin-top: 1.25rem; }
.billing-book-offer .billing-coupon { align-items: flex-start; margin: 0 0 1rem; }
.billing-coupon strong, .billing-coupon span { display: block; }
.billing-coupon span { margin-top: 0.25rem; color: var(--muted); }
.billing-coupon__form { width: 100%; }
.billing-coupon__form label { display: block; margin-bottom: 0.35rem; font-size: 0.82rem; font-weight: 700; }
.billing-coupon__form > div { display: flex; gap: 0.5rem; }
.billing-coupon__form input[type="text"] { flex: 1; min-width: 0; padding: 0.6rem 0.75rem; border: 1px solid var(--border); border-radius: 8px; text-transform: uppercase; }
.billing-coupon__remove { border: 0; background: transparent; cursor: pointer; }

.billing-result-page { min-height: calc(100vh - 68px); padding: clamp(3rem, 8vw, 7rem) 1rem; background: var(--surface); }
.billing-result-card { width: min(620px, 100%); margin: 0 auto; padding: clamp(1.5rem, 6vw, 3rem); border: 1px solid var(--border); border-radius: var(--radius); background: white; box-shadow: var(--shadow); text-align: center; }
.billing-result-card--wide { width: min(760px, 100%); }
.billing-result-card > .status-badge { margin: 0 0 1rem; }
.billing-result-card > p { color: var(--muted); }
.billing-summary { display: grid; margin: 2rem 0; text-align: left; }
.billing-summary div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.8rem 0; border-bottom: 1px solid var(--border); }
.billing-summary dt { color: var(--muted); font-weight: 700; }
.billing-summary dd { margin: 0; text-align: right; }
.billing-actions { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 0.75rem; }
.billing-actions form { margin: 0; }

.profile-card--billing { grid-column: 1 / -1; }
.profile-card--billing h3 { margin-top: 1.5rem; }
.billing-history { margin: 0; padding: 0; list-style: none; }
.billing-history li { display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0; border-bottom: 1px solid var(--border); }
.billing-admin-section { margin: 0 0 2.5rem; }
.admin-tabs + .billing-admin-section { padding-top: 1.25rem; }
.billing-admin-section > p { color: var(--muted); }
.billing-admin-fields { display: grid; gap: 1rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }

.status-badge--paid, .status-badge--approved, .status-badge--processed { background: #e7f4e9; color: #1e6c2b; }
.status-badge--pending, .status-badge--processing, .status-badge--syncing, .status-badge--canceling { background: #fff3d8; color: #815a00; }
.status-badge--failed, .status-badge--refunded, .status-badge--disputed, .status-badge--rejected, .status-badge--past_due { background: #ffe5e7; color: var(--danger); }
.status-badge--retired, .status-badge--canceled, .status-badge--ignored, .status-badge--expired { background: #ececf0; color: #5d5f6b; }

@media (max-width: 720px) {
  .billing-page, .billing-result-page { min-height: calc(100vh - 60px); }
  .billing-plan-grid, .billing-admin-fields { grid-template-columns: 1fr; }
  .billing-current { align-items: stretch; flex-direction: column; }
  .billing-review dl div { align-items: flex-start; flex-direction: column; }
  .billing-review dd { text-align: left; }
  .billing-page--purchase { padding: 1.5rem 0.75rem 3rem; }
  .purchase-checkout__summary { align-items: start; padding: 1.25rem; gap: 1rem; grid-template-columns: minmax(82px, 110px) minmax(0, 1fr); }
  .purchase-checkout__title { font-size: clamp(1.65rem, 7vw, 2.2rem); }
  .purchase-checkout__description { font-size: 0.9rem; }
  .purchase-checkout__price { margin-top: 1rem; padding: 0.75rem 0.9rem; }
  .purchase-checkout__form { padding: 1.25rem; }
  .billing-coupon, .billing-coupon__form > div { align-items: stretch; flex-direction: column; }
  .billing-actions { align-items: stretch; flex-direction: column; }
  .billing-actions .button, .billing-actions form { width: 100%; }
  .profile-card--billing { grid-column: auto; }
}