:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f5f8;
  color: #172033;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: radial-gradient(circle at top, #fff 0, #f3f5f8 55%, #e8edf4 100%);
}

.checkout-shell { width: min(100%, 520px); }
.brand { margin: 0 0 18px; text-align: center; font-weight: 700; letter-spacing: .02em; }
.brand span { display: inline-grid; place-items: center; width: 34px; height: 34px; margin-right: 8px; border-radius: 10px; background: #172033; color: #fff; }
.card { padding: 34px; border: 1px solid #dce2ea; border-radius: 20px; background: rgba(255,255,255,.96); box-shadow: 0 24px 60px rgba(29,45,73,.12); }
.eyebrow { margin: 0 0 10px; color: #5b6d87; font-size: 12px; font-weight: 800; letter-spacing: .14em; }
h1 { margin: 0; font-size: clamp(25px, 6vw, 34px); line-height: 1.15; }
.summary { margin: 14px 0 24px; color: #526078; line-height: 1.65; }
.status { min-height: 48px; padding: 14px 16px; border-radius: 12px; background: #f0f4f9; color: #3e4b61; line-height: 1.45; }
.status.error { background: #fff0f0; color: #9b2424; }
.status.success { background: #eaf8f0; color: #17633b; }
.primary, .secondary { width: 100%; min-height: 48px; margin-top: 14px; border-radius: 12px; font: inherit; font-weight: 700; text-align: center; }
.primary { border: 0; background: #172033; color: #fff; cursor: pointer; }
.secondary { display: grid; place-items: center; color: #526078; text-decoration: none; }
.review-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 16px; margin-top: 22px; padding-top: 20px; border-top: 1px solid #e3e8ef; }
.review-links a { color: #526078; font-size: 13px; font-weight: 650; text-decoration: none; }
.review-links a:hover, .review-links a:focus-visible { color: #172033; text-decoration: underline; }
.fineprint { margin: 18px 20px 0; color: #68768b; font-size: 12px; line-height: 1.6; text-align: center; }

@media (max-width: 520px) {
  body { padding: 16px; }
  .card { padding: 26px 20px; }
}