/* ====== 共通レイアウト ====== */
.choise-main {
  max-width: 800px;
  margin: 2em auto 1em auto;
  padding: 1.5em 1.5em 0 1.5em;
  background-color: #f9f9f9;
  border: 1px solid #ccc;
  border-radius: 8px;
  flex: none;
}

.update-date {
  text-align: center;
  font-size: 0.9em;
  color: #666;
  margin-bottom: 0.3em;
}

h1 {
  text-align: center;
  font-size: 1.6em;
  margin-bottom: 1em;
}

/* ====== 出題・選択肢表示用 ====== */
.question {
  font-size: 1.2em;
  margin-bottom: 1em;
}

.option {
  display: flex;
/*  justify-content: center; */
  align-items: center;
  margin: 0.5em 0;
  padding: 0.5em;
  border-radius: 4px;
}

.option label {
  display: inline-block;
  min-width: 200px;
  text-align: left;
}

.option input[type="radio"] {
  margin-right: 0.5em;
}

.correct-answer {
  background-color: #e6f6e6;
}
.wrong-answer {
  background-color: #fceaea;
}

.correct {
  color: green;
  font-weight: bold;
  margin-left: 0.5em;
}
.wrong {
  color: red;
  font-weight: bold;
  margin-left: 0.5em;
}

.explanation {
  margin-top: 1em auto;
  padding: 1em;
/*  background: #fff8dc;
  border-left: 4px solid #ccc; */
}

.submit-box {
  text-align: center;
  margin: 1.5em auto;
/*  margin-bottom: 0; */
}

button {
  padding: 0.5em 1.2em;
  font-size: 1em;
  background: #007acc;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin: 0;
}


    table { width: 100%; border-collapse: collapse; background: #fff; }
    th, td { border: 1px solid #ccc; padding: 0.5em; vertical-align: top; }
    th { background: #e0e0e0; }

    .btn { padding: 0.4em 0.6em; background: #007bff; color: #fff; border: none; border-radius: 4px; cursor: pointer; margin-bottom: 0.3em; }
    .btn:hover { background: #0056b3; }
    .answer-text, .ref-text { display: none; }
		.detail-text { display: none; }
    mark { background-color: yellow; }
    .page-info-box { margin: 1em 0; text-align: center; }
    .total-info { margin-bottom: 0.5em; font-weight: bold; }
    .back-link { margin-top: 0.5em; text-align: center; }
    .back-anchor { text-decoration: none; color: #007bff; }
    .back-anchor:hover { text-decoration: underline; }



/* ▼ クイズエリア */
.top-quiz-area {
  background-color: #f9f9f9;
  border: 1px solid #c0d8e8;
  border-radius: 8px;
  padding: 1em;
  margin: 2em auto;
  width: 100%;
  max-width: 700px;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.top-quiz-area h2 {
  font-size: 1.3em;
  margin-bottom: 0.8em;
  color: #005a8d;
  text-align: center;
}

.top-quiz-area form {
  display: inline-block;
  text-align: left;
}

.top-quiz-area form label {
  display: block;
  margin: 0.5em 0;
  font-size: 1.1em;
  cursor: pointer;
}

.top-quiz-area form input[type="radio"] {
  margin-right: 0.5em;
}

.top-quiz-area form button {
  display: block;
  margin: 1em auto 0;
  padding: 0.5em 1.5em;
  background-color: #007acc;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1.1em;
  cursor: pointer;
}