* {
  box-sizing: border-box;
}

#demo {
  font-family: "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  padding: 20px;
  margin: 0;
  background-color: #f8f9fa;
  color: #333;
}

#demo h1 {
  font-size: 1.4em;
  margin-bottom: 1em;
  text-align: center;
}

#form {
  max-width: 600px;
  margin: auto;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.question {
  margin-bottom: 20px;
  padding: 12px;
  background: #f1f3f5;
  border-radius: 6px;
}
.question label {
  font-weight: 500;
  margin-bottom: 8px;
  display: block;
}

.question label input[type="radio"] {
  vertical-align: middle;
}

input[type="radio"] {
  margin-right: 6px;
}




.radio-group {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.radio-option {
  display: inline-block;
  width:45%;
  text-align:center;
  padding: 10px 16px;
  background-color: #e0e0e0;
  border-radius: 6px;
  border: 1px solid #ccc;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
  transition: background-color 0.3s, color 0.3s;
  position: relative;
}

/* 非表示のラジオボタン */
.radio-option input[type="radio"] {
  display: none;
}

/* 選択されたラベルを強調（checked） */
.radio-option input[type="radio"]:checked + label,
.radio-option input[type="radio"]:checked ~ span,
.radio-option:has(input[type="radio"]:checked) {
  background-color: #007bff;
  color: white;
  border-color: #0056b3;
}



button {
  display: block;
  width: 100%;
  padding: 12px;
  font-size: 16px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 20px;
}

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

#score,
#result {
  margin-top: 30px;
  padding: 16px;
  background-color: #e9f7ef;
  border-left: 6px solid #28a745;
  border-radius: 6px;
  font-weight: 500;
  color: #155724;
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
    padding: 15px;
  }

  .question {
    padding: 10px;
  }

  button {
    font-size: 15px;
    padding: 10px;
  }

  #result {
    font-size: 15px;
  }
}