body {
  font-family: 'Roboto', Arial, sans-serif;
  background: linear-gradient(135deg, #e0e7ff 0%, #f5f7fa 100%);
  min-height: 100vh;
}
.main-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.card {
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.13);
  border-radius: 1rem;
  border: none;
}
.key-value {
  font-family: 'Roboto Mono', monospace;
  font-size: 1.3rem;
  word-break: break-all;
  color: #22223b;
  background: #e9ecef;
  border-radius: 6px;
  padding: 0.8em 1em;
  margin: 0.2em 0;
  display: inline-block;
}
.spinner-border {
  width: 2rem;
  height: 2rem;
}
.footer {
  margin-top: 3rem;
  color: #868686;
  font-size: 0.97rem;
  text-align: center;
}
.btn-link-step {
  min-width: 180px;
  margin-bottom: 0.7rem;
  font-size: 1.12rem;
}
.countdown-badge {
  font-size: 0.98em;
  margin-left: 0.5em;
  vertical-align: middle;
}