:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --ink: #1b2433;
  --muted: #5c6478;
  --border: #cdd3df;
  --link: #2e58d0;
  --danger: #c0392b;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  line-height: 1.5;
}
main {
  max-width: 460px;
  margin: 0 auto;
  padding: 48px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
}
.lead {
  margin: 0;
  font-size: 16px;
  color: var(--muted);
}
.muted {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}
.code {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
}
ol {
  margin: 0;
  padding-left: 20px;
}
li + li {
  margin-top: 6px;
}
.button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border-radius: 14px;
  background: var(--link);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
}
.button.secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1.5px solid var(--border);
}
.stores {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.error {
  color: var(--danger);
}
[hidden] {
  display: none !important;
}