body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  color: #333;
  background-color: #f9f9f9;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.control-panel {
  background: #f0f4f8;
  padding: 15px;
  border-radius: 6px;
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 15px;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 5px;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 4px;
  cursor: pointer;
}

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

/* テーブルのデザイン */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  font-size: 14px;
}

th, td {
  border: 1px solid #000;
  padding: 10px;
  text-align: center;
  vertical-align: middle;
}

th {
  background-color: #fff;
  font-weight: normal;
}

td.question-col {
  text-align: left;
  width: 35%;
}

.header-small {
  font-size: 12px;
  color: #555;
}