.checkout-body { min-height: 100vh; background: var(--color-paper); }
.checkout-header { background: rgba(247, 250, 248, .92); border-bottom: 1px solid var(--color-line); }
.checkout-header-inner, .checkout-footer .container { display: flex; align-items: center; justify-content: space-between; }
.checkout-header-inner { min-height: 86px; }
.checkout-back { font-size: .82rem; font-weight: 800; text-underline-offset: 5px; }
.checkout-main { padding: 70px 0 100px; }
.checkout-layout { display: grid; gap: 65px; align-items: start; grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr); }
.buyer-panel h1 { max-width: 650px; margin: 20px 0 0; font-family: var(--font-display); font-size: clamp(2.2rem, 3.8vw, 3.2rem); font-weight: 700; letter-spacing: -.02em; line-height: 1.08; }
.checkout-lead { max-width: 650px; margin: 24px 0 0; color: rgba(18, 41, 33, .75); font-size: 1.08rem; }
.checkout-availability { display: grid; gap: 3px; padding: 18px 20px; margin-top: 32px; color: #5c4100; background: #fbe8ba; border: 1px solid rgba(92, 65, 0, .2); border-radius: var(--radius-md); }
.checkout-availability[data-ready="true"] { color: var(--color-ink-deep); background: var(--color-mint); border-color: rgba(18, 41, 33, .18); }
.checkout-availability span { font-size: .82rem; }
.checkout-form { display: grid; gap: 20px; margin-top: 34px; }
.buyer-fields { display: grid; gap: 20px; }
.buyer-fields[hidden] { display: none; }
.form-field { display: grid; gap: 7px; }
.form-field label { font-size: .78rem; font-weight: 850; letter-spacing: .06em; text-transform: uppercase; }
.form-field input { width: 100%; min-height: 56px; padding: 0 16px; color: var(--color-ink-deep); background: var(--color-paper-light); border: 1px solid rgba(18, 41, 33, .25); border-radius: 12px; }
.form-field input:disabled { cursor: not-allowed; opacity: .66; }
.form-field input[aria-invalid="true"] { border-color: #a72f24; box-shadow: 0 0 0 3px rgba(167, 47, 36, .1); }
.field-help, .field-error { font-size: .73rem; }
.field-help { color: rgba(18, 41, 33, .68); }
.field-error { min-height: 1.1em; color: #94291f; font-weight: 700; }
.terms-check { display: grid; gap: 12px; align-items: start; font-size: .82rem; grid-template-columns: 20px 1fr; }
.terms-check input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--color-ink); }
.terms-check a { font-weight: 800; text-underline-offset: 3px; }
.checkout-submit { width: 100%; min-height: 58px; border: 0; }
.form-status { min-height: 1.4em; margin: 0; color: #94291f; font-size: .8rem; font-weight: 700; text-align: center; }
.external-checkout-note { padding: 20px; color: var(--color-ink-deep); background: rgba(220, 239, 227, .35); border: 1px solid rgba(18, 41, 33, .16); border-radius: 16px; }
.external-checkout-note[hidden] { display: none; }
.external-checkout-note p { margin: 7px 0 0; color: rgba(18, 41, 33, .76); font-size: .82rem; }
.data-note { padding: 20px; margin-top: 28px; border: 1px solid var(--color-line); border-radius: 18px; }
.data-note p { margin: 5px 0 0; color: rgba(18, 41, 33, .7); font-size: .8rem; }
.order-panel { position: sticky; top: 24px; padding: 32px; background: var(--color-paper-light); border: 1px solid rgba(18, 41, 33, .13); border-radius: var(--radius-xl); box-shadow: var(--shadow-soft); }
.order-product { display: grid; gap: 20px; align-items: center; grid-template-columns: 105px 1fr; }
.order-cover { display: flex; min-height: 142px; padding: 18px 14px; color: var(--color-paper-light); background: var(--color-ink); border-radius: var(--radius-lg); flex-direction: column; justify-content: space-between; }
.order-cover span { color: var(--color-lime); font-size: .52rem; font-weight: 900; letter-spacing: .14em; }
.order-cover b { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; line-height: 1; }
.order-product > div:last-child > span { color: var(--color-coral-dark); font-size: .68rem; font-weight: 850; text-transform: uppercase; }
.order-product h2 { margin: 3px 0 0; font-family: var(--font-display); font-size: 1.75rem; line-height: 1; }
.order-product p { margin: 10px 0 0; color: rgba(18, 41, 33, .7); font-size: .76rem; }
.order-summary { margin: 30px 0 0; border-top: 1px solid var(--color-line); }
.order-summary div { display: flex; padding: 14px 0; justify-content: space-between; border-bottom: 1px solid var(--color-line); }
.order-summary dt, .order-summary dd { margin: 0; font-size: .82rem; }
.order-summary div:last-child { font-weight: 900; }
.single-payment { padding: 14px; margin: 18px 0 0; background: rgba(220, 239, 227, .35); border-radius: 10px; font-size: .76rem; }
.seller-card, .independence-note { display: grid; gap: 4px; padding-top: 24px; margin-top: 24px; border-top: 1px solid var(--color-line); }
.seller-card > span, .independence-note > strong { color: var(--color-coral-dark); font-size: .68rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.seller-card strong { margin-top: 3px; font-size: .78rem; }
.seller-card small, .seller-card a, .independence-note p { overflow-wrap: anywhere; color: rgba(18, 41, 33, .67); font-size: .7rem; }
.seller-card a { margin-top: 4px; font-weight: 800; }
.independence-note p { margin: 2px 0 0; }
.checkout-footer { padding: 25px 0; color: rgba(255, 253, 248, .72); background: var(--color-ink-deep); font-size: .7rem; }
.checkout-footer nav { display: flex; gap: 18px; }

.payment-main, .confirmation-main { padding: 65px 0 100px; }
.payment-shell { max-width: 720px; }
.payment-heading { text-align: center; }
.payment-heading h1, .confirmation-card h1 { margin: 18px 0 0; font-family: var(--font-display); font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; letter-spacing: -.02em; line-height: 1.1; }
.payment-heading p { max-width: 560px; margin: 20px auto 0; color: rgba(18, 41, 33, .72); }
.payment-secure { font-size: .72rem; font-weight: 800; }
.payment-card { min-height: 420px; padding: 38px; margin-top: 42px; background: var(--color-paper-light); border: 1px solid var(--color-line); border-radius: var(--radius-xl); box-shadow: var(--shadow-soft); text-align: center; }
.payment-card [hidden] { display: none !important; }
.payment-card h2 { margin: 15px 0 10px; font-family: var(--font-display); font-size: 2.2rem; }
.payment-loading { display: grid; min-height: 330px; place-content: center; }
.loading-mark { width: 45px; height: 45px; margin-inline: auto; border: 4px solid var(--color-mint); border-top-color: var(--color-coral); border-radius: 50%; animation: loading-spin 800ms linear infinite; }
@keyframes loading-spin { to { transform: rotate(360deg); } }
.status-pill { display: inline-block; padding: 7px 12px; color: var(--color-ink-deep); background: var(--color-lime); border-radius: 999px; font-size: .7rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.status-muted { background: var(--color-sand); }
.status-error { color: #fff; background: #a72f24; }
.pix-qr { width: 230px; height: 230px; padding: 12px; margin: 20px auto 25px; background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius-md); }
.payment-card label { display: block; margin-bottom: 8px; font-size: .75rem; font-weight: 850; }
.copy-field { display: grid; grid-template-columns: 1fr auto; }
.copy-field input, .copy-field button { min-height: 52px; border: 1px solid var(--color-line); }
.copy-field input { min-width: 0; padding: 0 14px; background: var(--color-paper); border-radius: 10px 0 0 10px; text-overflow: ellipsis; }
.copy-field button { padding: 0 19px; color: var(--color-paper-light); background: var(--color-ink); border-radius: 0 10px 10px 0; cursor: pointer; font-weight: 850; }
.payment-facts { display: grid; margin: 24px 0 0; border-top: 1px solid var(--color-line); grid-template-columns: repeat(3, 1fr); }
.payment-facts div { padding: 16px 8px; }
.payment-facts dt, .payment-facts dd { margin: 0; font-size: .72rem; }
.payment-facts dd { margin-top: 3px; font-weight: 900; }
.payment-wait { margin-bottom: 0; color: rgba(18, 41, 33, .67); font-size: .75rem; }
.demo-payment { padding: 10px 14px; margin-top: 18px; color: #5c4100; background: #fbe8ba; border: 1px solid rgba(92, 65, 0, .22); border-radius: 10px; cursor: pointer; font-size: .72rem; font-weight: 850; }
.payment-help { padding: 20px; margin-top: 24px; border: 1px solid var(--color-line); border-radius: 16px; font-size: .77rem; }
.payment-help p { margin: 5px 0 8px; color: rgba(18, 41, 33, .72); }
.payment-help a { font-weight: 800; }
.confirmation-main { display: grid; min-height: 100vh; place-items: center; }
.confirmation-card { width: min(680px, calc(100% - 28px)); padding: 58px; background: var(--color-paper-light); border: 1px solid var(--color-line); border-radius: var(--radius-xl); box-shadow: var(--shadow-soft); text-align: center; }
.confirmation-mark { display: grid; width: 62px; height: 62px; margin: 0 auto 24px; place-items: center; color: var(--color-paper-light); background: var(--color-ink); border-radius: 50%; font-size: 1.7rem; }
.confirmation-card > p { max-width: 520px; margin: 22px auto 0; }
.confirmation-note { display: grid; gap: 5px; padding: 20px; margin-top: 28px; background: rgba(220, 239, 227, .35); border-radius: 14px; }
.confirmation-note span, .confirmation-support { font-size: .8rem; }
.confirmation-card .button { margin-top: 28px; }

@media (max-width: 840px) {
  .checkout-layout { grid-template-columns: 1fr; }
  .order-panel { position: static; order: -1; }
}

@media (max-width: 560px) {
  .checkout-header-inner { min-height: 72px; }
  .checkout-header .brand small, .checkout-back { display: none; }
  .checkout-main, .payment-main { padding: 36px 0 70px; }
  .checkout-layout { gap: 45px; }
  .buyer-panel h1 { font-size: 2rem; }
  .order-panel { padding: 24px 20px; }
  .order-product { align-items: start; grid-template-columns: 82px 1fr; }
  .order-cover { min-height: 116px; }
  .order-cover b { font-size: 1.35rem; }
  .checkout-footer .container { gap: 14px; align-items: flex-start; flex-direction: column; }
  .payment-card { padding: 28px 18px; }
  .payment-facts { grid-template-columns: 1fr; }
  .payment-facts div { border-bottom: 1px solid var(--color-line); }
  .confirmation-card { padding: 42px 22px; }
  .confirmation-card h1 { font-size: 2rem; }
}

@media (prefers-reduced-motion: reduce) { .loading-mark { animation: none; } }