*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(160deg, #0f172a 0%, #134e4a 100%);
  color: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.card {
  width: 100%;
  max-width: 420px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: #94a3b8;
  font-size: 0.95rem;
  line-height: 1.5;
}

.btn {
  display: inline-block;
  width: 100%;
  padding: 0.9rem 1.25rem;
  border-radius: 0.75rem;
  background: #14b8a6;
  color: #042f2e;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.15s ease;
}

.btn:hover {
  background: #2dd4bf;
}

.qr {
  margin: 1.5rem auto 0;
  padding: 0.75rem;
  background: #fff;
  border-radius: 0.75rem;
  display: inline-block;
}

.qr img {
  display: block;
  width: 180px;
  height: 180px;
}

.hint {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: #64748b;
  line-height: 1.5;
}

.card--compact {
  max-width: 360px;
  padding: 1.5rem;
}

.logo--sm {
  width: 44px;
  height: 44px;
}

.steps {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  text-align: left;
  color: #cbd5e1;
  font-size: 0.9rem;
  line-height: 1.6;
}

.steps li + li {
  margin-top: 0.35rem;
}

.qr--sm {
  margin-top: 1.25rem;
}

.qr--sm img {
  width: 160px;
  height: 160px;
}