body {
  font-family: Arial, sans-serif;
  background-color: #f0f2f5;
  margin: 0;
  padding: 0;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.card {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

h1 {
  color: #333;
  margin-bottom: 20px;
  text-align: center;
}

p {
  color: #666;
  margin-bottom: 20px;
  text-align: center;
}

.loading, .error {
  text-align: center;
  color: #666;
  font-size: 18px;
  margin-top: 20px;
}

.error {
  color: #d32f2f;
}

.logged-in {
  text-align: center;
}

.sign-out-btn {
  background-color: #d32f2f;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
}

.sign-out-btn:hover {
  background-color: #b71c1c;
}

.test-btn {
  background-color: #4CAF50;
  color: white;
  padding: 10px 15px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin: 5px;
}

.test-btn:hover {
  background-color: #45a049;
}

.admin-data {
  margin-top: 20px;
  background-color: #f1f1f1;
  padding: 15px;
  border-radius: 4px;
}

.admin-data pre {
  white-space: pre-wrap;
  word-wrap: break-word;
}

@media (max-width: 480px) {
  .card {
    padding: 20px;
  }
}