*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.45;
  color: #1f2430;
  background: #f6f5f2;
}
.wrap { max-width: 520px; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: 24px; margin: 4px 0 16px; }
h2 { font-size: 16px; margin: 24px 0 8px; }
.unavailable { text-align: center; margin-top: 30vh; color: #5b6272; }

.summary { background: #fff; border: 1px solid #e3e0d8; border-radius: 8px; padding: 12px 14px; }
.line { display: flex; justify-content: space-between; gap: 12px; padding: 4px 0; }
.line.muted { color: #5b6272; }
.line.total { border-top: 1px solid #e3e0d8; margin-top: 6px; padding-top: 10px; font-weight: 600; }

label { display: block; font-size: 14px; color: #3c4252; margin-bottom: 10px; }
input[type="text"], input[type="email"], .card-field {
  display: block; width: 100%; margin-top: 4px; padding: 12px;
  font-size: 16px; color: #1f2430; background: #fff;
  border: 1px solid #c9c5ba; border-radius: 6px;
}
input:focus { outline: 2px solid #b8892b; outline-offset: 0; border-color: #b8892b; }
.card-field { min-height: 46px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.row.three { grid-template-columns: 1fr; }
@media (min-width: 480px) { .row.three { grid-template-columns: 2fr 1fr 1fr; } }

.rewards {
  display: flex; gap: 10px; align-items: flex-start; margin-top: 20px; padding: 12px;
  background: #fff; border: 2px dashed #e0b84f; border-radius: 6px; font-size: 13px; color: #3c4252;
}
.rewards input { margin-top: 3px; width: 18px; height: 18px; flex: none; }
.rewards strong { display: block; font-size: 15px; color: #1f2430; margin-bottom: 2px; }

button {
  display: block; width: 100%; margin-top: 20px; padding: 15px;
  font-size: 17px; font-weight: 600; color: #fff; background: #1f2430;
  border: 0; border-radius: 8px; cursor: pointer;
}
button:disabled { opacity: .55; cursor: default; }
.error { color: #a1271b; font-size: 14px; margin: 12px 0 0; }

.result { margin-top: 24px; padding: 16px; background: #fff; border: 1px solid #e3e0d8; border-radius: 8px; }
.result h2 { margin-top: 0; font-size: 20px; }
.result ul { padding-left: 18px; margin: 8px 0 0; font-size: 14px; color: #3c4252; word-break: break-word; }