body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f0f0f0;
}

#app {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#quiz-container {
  margin-bottom: 20px;
}

#quiz-form, #login-form, #signup-form, #quiz-info, #quiz-active, #quiz-results, #profile-container {
  margin-top: 20px;
}

input, textarea {
  width: 100%;
  margin-bottom: 10px;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

button {
  padding: 10px 15px;
  border: none;
  border-radius: 4px;
  background-color: #007bff;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}