body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: #f0f2f5;
}
#auth-container {
  background: white;
  padding: 2rem 3rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
  min-width: 300px;
}
.hidden {
  display: none;
}
#user-photo {
  border-radius: 50%;
  margin-top: 10px;
  width: 60px;
  height: 60px;
}
button {
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  margin-top: 1rem;
  transition: background-color 0.2s;
}
#login-button {
  background-color: #4285f4;
  color: white;
}
#login-button:hover {
  background-color: #357ae8;
}
#logout-button,
#call-protected-function {
  background-color: #f4f4f4;
  color: #333;
  border: 1px solid #ddd;
  margin-left: 5px;
  margin-right: 5px;
}
#logout-button:hover,
#call-protected-function:hover {
  background-color: #e9e9e9;
}
#api-response {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #666;
  word-break: break-all;
}