body, html {
  height: 100%;
  margin: 0;
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: white;
}
.container {
  text-align: center;
  padding: 0 20px;
  max-width: 600px;
}
.header {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 40px;
}
.body {
  font-size: 16px;
  color: #666;
  margin-bottom: 20px;
}
.spinner {
  border: 4px solid rgb(0, 40, 60);
  border-top: 4px solid rgb(255, 255, 255);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}
.addendum {
  font-size: 14px;
  color: #666;
  margin-top: 40px;
}
#guid {
  margin-top: 20px;
  font-size: 12px;
  color: #999;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}