:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #17191c;
  background: #f4f6f8;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.shell { max-width: 760px; margin: 48px auto; padding: 0 20px; }
.card { background: #fff; border: 1px solid #dfe3e8; border-radius: 16px; padding: 32px; box-shadow: 0 10px 30px rgba(20, 28, 38, .07); }
.header { margin-bottom: 28px; }
.eyebrow { margin: 0 0 6px; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: #59636f; }
h1 { margin: 0; font-size: 28px; line-height: 1.2; }
h2 { margin: 0 0 12px; font-size: 20px; }
h3 { margin: 22px 0 8px; font-size: 16px; }
.lead, p { line-height: 1.55; }
.lead { margin-bottom: 0; color: #4f5965; }
.panel { border-top: 1px solid #e4e7eb; padding-top: 24px; }
.hidden { display: none !important; }
label { display: block; margin: 16px 0 6px; font-weight: 650; }
input { width: 100%; padding: 11px 12px; border: 1px solid #b9c1ca; border-radius: 8px; font: inherit; }
input:focus { outline: 2px solid #111827; outline-offset: 2px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
button { padding: 11px 16px; border: 0; border-radius: 8px; font: inherit; font-weight: 700; cursor: pointer; }
button:disabled { opacity: .55; cursor: not-allowed; }
.primary { background: #111827; color: #fff; }
.secondary { background: #e8ebef; color: #17191c; }
.danger { background: #8d1f1f; color: #fff; }
.status { margin: 0 0 24px; padding: 12px 14px; border-radius: 9px; border: 1px solid #cbd2da; background: #f8fafc; white-space: pre-wrap; }
.status.error { border-color: #e4a4a4; background: #fff1f1; color: #771515; }
.status.info { border-color: #b9c8de; background: #f2f6fc; color: #26384f; }
.qr-wrap { margin: 18px 0; }
.qr { width: 250px; max-width: 100%; height: auto; border: 1px solid #d8dde3; background: #fff; padding: 8px; }
.hint { font-size: 14px; color: #59636f; }
.facts { margin: 0; }
.facts div { display: grid; grid-template-columns: 180px 1fr; gap: 14px; padding: 9px 0; border-bottom: 1px solid #edf0f3; }
dt { font-weight: 700; }
dd { margin: 0; overflow-wrap: anywhere; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
@media (max-width: 620px) {
  .shell { margin: 20px auto; }
  .card { padding: 22px; }
  .facts div { grid-template-columns: 1fr; gap: 3px; }
}