:root {
  --color-primary: #1d4ed8;
  --color-primary-hover: #1e40af;
  --color-accent: #0f766e;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-foreground: #172033;
  --color-muted: #eef2f7;
  --color-muted-foreground: #475569;
  --color-border: #cbd5e1;
  --color-danger: #b91c1c;
  --color-warning: #b45309;
  --color-warning-bg: #fff7ed;
  --color-warning-border: #fdba74;
  --color-focus: #2563eb;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-foreground);
  background: var(--color-background);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--color-background); }
body { margin: 0; min-height: 100vh; font-size: 16px; line-height: 1.5; }
button, input, select { font: inherit; }
button { letter-spacing: 0; }
[hidden] { display: none !important; }

.site-header {
  min-height: 64px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.brand { min-height: 44px; display: inline-flex; align-items: center; color: var(--color-foreground); font-size: 24px; font-weight: 800; text-decoration: none; }
.environment { display: flex; align-items: center; gap: var(--space-2); color: var(--color-muted-foreground); font-size: 14px; font-weight: 650; }
.environment span { width: 9px; height: 9px; border-radius: 50%; background: var(--color-accent); }

.checkout-shell { max-width: 1180px; margin: 0 auto; padding: var(--space-6) 20px var(--space-7); }
.progress { max-width: 760px; margin-bottom: var(--space-7); }
.progress ol { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); list-style: none; padding: 0; margin: 0; }
.progress li { position: relative; display: grid; justify-items: start; gap: var(--space-2); color: var(--color-muted-foreground); font-size: 13px; }
.progress li::after { content: ""; position: absolute; top: 17px; left: 38px; right: 8px; height: 2px; background: var(--color-border); }
.progress li:last-child::after { display: none; }
.progress span { width: 36px; height: 36px; display: grid; place-items: center; border: 2px solid var(--color-border); border-radius: 50%; background: var(--color-surface); font-weight: 750; }
.progress b { font-weight: 650; }
.progress .is-current, .progress .is-complete { color: var(--color-foreground); }
.progress .is-current span { border-color: var(--color-primary); box-shadow: 0 0 0 3px #dbeafe; color: var(--color-primary); }
.progress .is-complete span { border-color: var(--color-accent); background: var(--color-accent); color: white; }
.progress .is-complete::after { background: var(--color-accent); }

.checkout-main { display: grid; grid-template-columns: minmax(0, 760px) minmax(260px, 320px); gap: clamp(32px, 7vw, 92px); align-items: start; }
.checkout-content { min-width: 0; }
.step { animation: enter 180ms ease-out both; }
.eyebrow { margin: 0 0 var(--space-2); color: var(--color-primary); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.eyebrow.success { color: var(--color-accent); }
h1 { max-width: 22ch; margin: 0 0 var(--space-3); font-size: 38px; line-height: 1.15; letter-spacing: 0; text-wrap: balance; }
.lede { max-width: 62ch; margin: 0 0 var(--space-6); color: var(--color-muted-foreground); }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.field { display: grid; gap: 6px; }
.field.full-width { grid-column: 1 / -1; }
label, legend { font-weight: 700; }
input[type="text"], input[type="email"], input:not([type]), select { width: 100%; min-height: 48px; padding: 10px 12px; border: 1px solid #94a3b8; border-radius: 6px; background: white; color: var(--color-foreground); }
input[aria-invalid="true"] { border-color: var(--color-danger); }
.hint, .field-error { margin: 0; font-size: 13px; }
.hint { color: var(--color-muted-foreground); }
.field-error { color: var(--color-danger); font-weight: 650; }

.value-picker { margin: var(--space-6) 0 var(--space-5); padding: 0; border: 0; }
.value-picker legend { margin-bottom: var(--space-3); }
.denominations { display: grid; grid-template-columns: repeat(5, minmax(88px, 1fr)); gap: var(--space-3); }
.denomination { position: relative; min-width: 0; }
.denomination input { position: absolute; opacity: 0; pointer-events: none; }
.denomination label { min-height: 54px; padding: 0 var(--space-2); display: grid; place-items: center; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-surface); cursor: pointer; text-align: center; }
.denomination input:checked + label { border-color: var(--color-primary); box-shadow: inset 0 0 0 1px var(--color-primary); color: var(--color-primary); background: #eff6ff; }
.denomination input:focus-visible + label { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.loading { grid-column: 1 / -1; margin: 0; color: var(--color-muted-foreground); }

.check-row { min-height: 44px; display: flex; align-items: flex-start; gap: var(--space-3); margin: var(--space-4) 0; padding: 10px 0; font-weight: 500; cursor: pointer; }
.check-row input { width: 20px; height: 20px; margin: 2px 0 0; flex: 0 0 auto; accent-color: var(--color-primary); }
.button { min-height: 48px; padding: 10px 18px; border: 1px solid transparent; border-radius: 6px; font-weight: 750; cursor: pointer; transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, opacity 180ms ease; }
.button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.button:disabled { cursor: wait; opacity: .62; }
.button.primary { margin-top: var(--space-4); background: var(--color-primary); color: white; }
.button.primary:hover:not(:disabled) { background: var(--color-primary-hover); }
.button.secondary { border-color: #94a3b8; background: white; color: var(--color-foreground); }
.button.secondary:hover:not(:disabled) { background: var(--color-muted); }
.actions { display: flex; gap: var(--space-3); margin-top: var(--space-5); }

.order-summary { position: sticky; top: var(--space-5); padding-left: var(--space-5); border-left: 1px solid var(--color-border); }
.order-summary h2 { margin: 0 0 var(--space-4); font-size: 18px; }
.summary-value { font-size: 30px; font-weight: 800; }
.order-summary > p { margin: 0 0 var(--space-5); color: var(--color-muted-foreground); }
.order-summary dl, .receipt-lines { display: grid; gap: var(--space-3); margin: 0; }
.order-summary dl div, .receipt-lines div { display: flex; justify-content: space-between; gap: var(--space-4); }
.order-summary dt, .receipt-lines dt { color: var(--color-muted-foreground); }
.order-summary dd, .receipt-lines dd { margin: 0; font-weight: 650; overflow-wrap: anywhere; text-align: right; }
.security-note { display: flex; gap: var(--space-2); margin-top: var(--space-5); padding-top: var(--space-4); border-top: 1px solid var(--color-border); color: var(--color-muted-foreground); font-size: 13px; }
.security-note span { color: var(--color-accent); font-weight: 900; }
.security-note p { margin: 0; }

.order-lines { display: grid; gap: var(--space-3); margin: var(--space-6) 0; }
.order-lines div { display: flex; justify-content: space-between; gap: var(--space-4); padding-bottom: var(--space-3); border-bottom: 1px solid var(--color-border); }
.order-lines dt { color: var(--color-muted-foreground); }
.order-lines dd { margin: 0; font-weight: 700; }
.order-lines .total { font-size: 18px; }
.order-lines.compact { max-width: 500px; }
.disclosure { padding: var(--space-5) 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.disclosure h2 { margin: 0 0 var(--space-3); font-size: 19px; }
.disclosure ul { margin: 0; padding-left: 22px; }
.disclosure li + li { margin-top: var(--space-2); }
.legal-note { margin: var(--space-4) 0 0; color: var(--color-muted-foreground); font-size: 13px; }
.simulator-notice { max-width: 620px; display: grid; gap: var(--space-2); margin: var(--space-5) 0; padding: var(--space-4); border: 1px solid var(--color-warning-border); border-radius: 6px; background: var(--color-warning-bg); }
.verification-boundary { max-width: 680px; display: grid; gap: var(--space-2); margin: var(--space-5) 0; padding: var(--space-4); border-left: 4px solid var(--color-primary); background: var(--color-muted); }
.verification-provider { width: 100%; min-height: 240px; margin: var(--space-5) 0 var(--space-4); padding: var(--space-4); display: grid; align-content: center; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-surface); }
.verification-provider iframe { width: 100%; min-height: 560px; border: 0; }
.verification-provider p { max-width: 56ch; margin: 0 auto; color: var(--color-muted-foreground); text-align: center; }
.verification-status { min-height: 24px; margin: 0; color: var(--color-muted-foreground); font-weight: 650; }
.verification-actions { flex-wrap: wrap; }
.verification-actions .primary { margin-top: 0; }
.enhanced-review-panel { max-width: 680px; margin: var(--space-5) 0; padding: var(--space-5) 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.enhanced-review-panel h2 { margin: 0 0 var(--space-2); font-size: 19px; }
.enhanced-review-panel > p { max-width: 62ch; margin: 0 0 var(--space-4); color: var(--color-muted-foreground); }
.enhanced-review-panel dl { margin: 0; display: grid; grid-template-columns: minmax(220px, 1.4fr) minmax(140px, 1fr) minmax(180px, 1fr); gap: var(--space-4); }
.enhanced-review-panel dl div { min-width: 0; }
.enhanced-review-panel dt { color: var(--color-muted-foreground); font-size: 13px; font-weight: 700; }
.enhanced-review-panel dd { margin: var(--space-1) 0 0; overflow-wrap: anywhere; font-weight: 700; }
.success-mark { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: var(--space-4); border-radius: 50%; background: var(--color-accent); color: white; font-size: 26px; font-weight: 900; }
.voucher-delivery { max-width: 620px; display: grid; grid-template-columns: 1fr auto; gap: var(--space-3); margin: var(--space-6) 0; padding: var(--space-4); border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-surface); }
.voucher-delivery > span { grid-column: 1 / -1; color: var(--color-muted-foreground); font-size: 13px; font-weight: 700; }
.voucher-delivery output { align-self: center; min-width: 0; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 18px; font-weight: 800; overflow-wrap: anywhere; }
.voucher-delivery .button { margin: 0; }
.copy-status { min-height: 24px; color: var(--color-accent); font-weight: 650; }
.lifecycle-receipts { margin-top: var(--space-6); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.lifecycle-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); }
.lifecycle-heading h2 { margin: 0; font-size: 20px; line-height: 1.3; }
.lifecycle-live-status { min-height: 24px; margin: var(--space-3) 0; color: var(--color-muted-foreground); font-size: 14px; font-weight: 650; }
.lifecycle-receipt-list { max-width: 620px; margin: 0; padding: 0; list-style: none; }
.lifecycle-receipt { position: relative; display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: var(--space-3); min-height: 72px; padding: var(--space-3) 0; }
.lifecycle-receipt:not(:last-child)::before { content: ""; position: absolute; top: 30px; bottom: -6px; left: 6px; width: 2px; background: var(--color-border); }
.lifecycle-marker { width: 14px; height: 14px; margin-top: 5px; border: 3px solid var(--color-surface); border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 0 1px var(--color-accent); }
.lifecycle-receipt-heading { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); }
.lifecycle-receipt-heading span { flex: 0 0 auto; font-weight: 750; }
.lifecycle-receipt p { margin: var(--space-1) 0 0; color: var(--color-muted-foreground); font-size: 14px; }
.lifecycle-empty { min-height: 48px; padding: var(--space-3) 0; color: var(--color-muted-foreground); }
.customer-support { margin-top: var(--space-7); padding-top: var(--space-6); border-top: 1px solid var(--color-border); }
.support-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-5); }
.support-heading h2 { margin: 0; font-size: 24px; line-height: 1.25; }
.button.compact { min-height: 44px; padding: 8px 14px; }
.customer-support form { max-width: 620px; }
.support-actions { display: flex; align-items: center; gap: var(--space-4); margin-top: var(--space-4); }
.support-actions .button { flex: 0 0 auto; margin: 0; }
.support-status { min-height: 24px; margin: 0; color: var(--color-muted-foreground); font-weight: 650; }
.support-case-list { display: grid; gap: var(--space-3); margin-top: var(--space-5); }
.support-case { padding: var(--space-4); border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-surface); }
.support-case-heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.support-case-heading strong { min-width: 0; overflow-wrap: anywhere; }
.support-case-status { padding: 3px 8px; border: 1px solid #93c5fd; border-radius: 999px; background: #eff6ff; color: #1e3a8a; font-size: 13px; font-weight: 750; white-space: nowrap; }
.support-case p { margin: var(--space-2) 0 0; }
.support-refund-status { padding-left: var(--space-3); border-left: 3px solid var(--color-primary); font-weight: 750; }
.support-refund-status[data-status="completed"] { border-left-color: var(--color-accent); color: #0f5f58; }
.support-refund-status[data-status="requires_review"], .support-refund-status[data-status="closed"] { border-left-color: var(--color-warning); color: #92400e; }
.support-case-timing, .support-empty { color: var(--color-muted-foreground); font-size: 14px; }
.support-empty { margin: 0; }
.error-summary { margin: 0 0 var(--space-5); padding: var(--space-4); border: 2px solid var(--color-danger); border-radius: 6px; background: #fef2f2; }
.error-summary h2 { margin: 0 0 var(--space-1); font-size: 18px; }
.error-summary p { margin: 0; }

@keyframes enter { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 1ms !important; transition-duration: 1ms !important; } }

@media (max-width: 860px) {
  .checkout-main { grid-template-columns: 1fr; }
  .order-summary { position: static; padding: var(--space-5) 0 0; border-left: 0; border-top: 1px solid var(--color-border); }
  .denominations { grid-template-columns: repeat(3, minmax(88px, 1fr)); }
}

@media (max-width: 560px) {
  .site-header { min-height: 58px; }
  .environment { font-size: 13px; }
  .checkout-shell { padding-top: var(--space-5); }
  h1 { font-size: 30px; }
  .progress { margin-bottom: var(--space-6); }
  .progress b { font-size: 12px; }
  .progress li::after { left: 36px; right: 5px; }
  .field-grid { grid-template-columns: 1fr; }
  .denominations { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .actions { flex-direction: column-reverse; }
  .actions .button, form > .button, #pay-button { width: 100%; }
  .verification-provider { min-height: 220px; padding: var(--space-3); }
  .verification-provider iframe { min-height: 620px; }
  .enhanced-review-panel dl { grid-template-columns: 1fr; gap: var(--space-3); }
  .voucher-delivery { grid-template-columns: 1fr; }
  .voucher-delivery > span { grid-column: auto; }
  .lifecycle-heading, .lifecycle-receipt-heading { align-items: stretch; flex-direction: column; gap: var(--space-2); }
  .lifecycle-heading .button { width: 100%; }
  .lifecycle-receipt-heading span { flex: auto; }
  .support-heading, .support-actions { align-items: stretch; flex-direction: column; }
  .support-heading .button, .support-actions .button { width: 100%; }
  .support-case-heading { align-items: flex-start; flex-direction: column; }
}