.checkout-layout {
  width: min(1120px, calc(100% - 40px));
  margin: 22px auto 80px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  align-items: start;
}

.form-panel, .summary-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.form-panel { padding: clamp(26px, 4.5vw, 52px); }
.form-heading { padding-bottom: 34px; border-bottom: 1px solid var(--line); }
.form-heading h1 { margin-bottom: 12px; font-size: clamp(36px, 5vw, 56px); }
.form-heading > p:last-child { max-width: 590px; margin-bottom: 0; color: var(--muted); font-size: 17px; }

.form-section { margin: 0; padding: 34px 0; border: 0; border-bottom: 1px solid var(--line); }
.form-section legend { width: 100%; margin-bottom: 18px; padding: 0; color: var(--ink); font-size: 20px; font-weight: 800; }
.form-section legend span { display: inline-grid; width: 28px; height: 28px; margin-right: 9px; place-items: center; border-radius: 50%; background: var(--teal-soft); color: #087d9a; font-size: 13px; }

.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choice-grid-three { grid-template-columns: repeat(3, 1fr); }
.choice-card { position: relative; display: flex; min-height: 92px; padding: 16px; gap: 11px; align-items: flex-start; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; transition: border-color .15s ease, background .15s ease; }
.choice-card:has(input:checked) { border-color: var(--teal); background: #f3fcfe; box-shadow: 0 0 0 1px var(--teal); }
.choice-card input { margin: 4px 0 0; accent-color: var(--navy); }
.choice-card span { display: flex; flex-direction: column; gap: 4px; }
.choice-card strong { line-height: 1.2; }
.choice-card small, .field small { color: var(--muted); font-size: 13px; line-height: 1.35; }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: flex; margin-top: 14px; flex-direction: column; gap: 7px; color: var(--ink); font-size: 14px; font-weight: 750; }
.field-grid .field { margin-top: 0; }
.field input, .field select { width: 100%; height: 50px; padding: 0 14px; border: 1px solid #becdd2; border-radius: 9px; outline: none; background: #fff; color: var(--ink); }
.field input:focus, .field select:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(35, 174, 209, .14); }
.field input[aria-invalid="true"], .field select[aria-invalid="true"] { border-color: #c53a3a; }
.field-error { min-height: 0; color: #b42a2a !important; }

.referral-note { margin-top: 16px; padding: 14px 16px; border-left: 3px solid var(--teal); background: var(--teal-soft); color: #28515f; font-size: 14px; }
.payment-grid { grid-template-columns: 1fr; }
.payment-card { min-height: 82px; align-items: center; }
.payment-card input { margin-top: 0; }
.payment-card span { flex: 1; }
.status { padding: 5px 8px; border-radius: 99px; font-size: 11px; letter-spacing: .03em; text-transform: uppercase; }
.status-live { background: #e0f6ed; color: var(--success); }
.status-later { background: #fff2dc; color: var(--warning); }

.honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.consent { display: flex; margin: 28px 0 20px; gap: 10px; align-items: flex-start; color: var(--muted); font-size: 14px; cursor: pointer; }
.consent input { margin-top: 3px; accent-color: var(--navy); }
.submit-row { display: flex; gap: 18px; align-items: center; }
.submit-button { min-height: 52px; padding: 12px 24px; border: 0; border-radius: 10px; background: var(--navy); color: #fff; font-weight: 800; cursor: pointer; }
.submit-button:hover { background: #06465f; }
.submit-row p { max-width: 300px; margin: 0; color: var(--muted); font-size: 13px; }
.form-alert { margin-top: 18px; padding: 14px 16px; border-radius: 10px; background: #fff0f0; color: #982626; font-size: 14px; }

.summary-panel { position: sticky; top: 20px; }
.summary-card { padding: 28px; box-shadow: 0 18px 45px rgba(0, 51, 73, .07); }
.summary-label { margin-bottom: 6px; color: #087d9a; font-size: 12px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.summary-card h2 { margin-bottom: 24px; font-size: 28px; letter-spacing: -.025em; }
.summary-card dl { margin: 0; }
.summary-card dl > div { display: flex; padding: 11px 0; justify-content: space-between; border-bottom: 1px solid var(--line); }
.summary-card dt { color: var(--muted); }
.summary-card dd { margin: 0; font-weight: 750; }
.summary-card .summary-total { padding: 18px 0; font-size: 18px; border-bottom: 0; }
.summary-card .summary-total dd { color: var(--navy); font-size: 26px; }
.payment-summary { margin: 4px 0 22px; padding: 14px; border-radius: 10px; background: var(--teal-soft); color: #28515f; font-size: 13px; }
.summary-card ul { margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 13px; }
.summary-card li { position: relative; padding: 7px 0 7px 22px; }
.summary-card li::before { position: absolute; left: 0; content: "✓"; color: var(--success); font-weight: 900; }

@media (max-width: 900px) {
  .checkout-layout { grid-template-columns: 1fr; }
  .summary-panel { position: static; grid-row: 1; }
  .summary-card { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
  .summary-card h2, .summary-label { grid-column: 1 / -1; }
  .summary-card ul { align-self: center; }
}

@media (max-width: 680px) {
  .checkout-layout { width: min(100% - 24px, 1120px); margin-top: 8px; }
  .form-panel { padding: 24px 18px; border-radius: 16px; }
  .form-heading h1 { font-size: 39px; }
  .choice-grid-three, .field-grid { grid-template-columns: 1fr; }
  .choice-card { min-height: 78px; }
  .summary-card { display: block; padding: 22px; }
  .submit-row { align-items: stretch; flex-direction: column; }
  .submit-button { width: 100%; }
}