.question-form {
  max-width: 600px;
  margin: 20px auto;
  padding: 1.5rem;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.question-block {
  margin-bottom: 1.5rem;
  padding: 1rem;
  border-radius: 6px;
}

.question-block.even {
  background-color: #f9f9f9;
}

.question-block.odd {
  background-color: #eef2f7;
}

.question-text {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.answer-options {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.answer-option {
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.submit-btn {
  display: block;
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
  background-color: #007BFF;
  color: #ffffff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.submit-btn:hover {
  background-color: #0056b3;
}

@media (max-width: 480px) {
  .answer-options {
    flex-direction: column;
  }
}

.header-container {
  text-align: center;
  margin-top: 30px;
}

.logo {
  max-width: 150px;
  height: auto;
  display: block;
  margin: 0 auto 10px auto;
}

.unanswered {
  background-color: #ffe6e6; /* light red */
  border: 1px solid #ff9999;
  padding: 10px;
  border-radius: 6px;
}