/* 全体のスタイル */
body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

/* ヘッダー */
header {
  margin-bottom: 2rem;
}

/* フッター */
footer {
  margin-top: 3rem;
}

/* カード */
.card {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
}

.card-header {
  font-weight: 500;
}

/* フォーム */
.form-label {
  font-weight: 500;
}

/* 試験関連 */
.question-text {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.options-list {
  margin-left: 1rem;
}

.question-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.question-nav-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid #ccc;
  border-radius: 4px;
  text-decoration: none;
  color: #333;
}

.question-nav-item.active {
  background-color: #0d6efd;
  color: white;
  border-color: #0d6efd;
}

.question-nav-item.answered {
  background-color: #d1e7dd;
  border-color: #badbcc;
}

.question-nav-item.active.answered {
  background-color: #0d6efd;
  border-color: #0d6efd;
}

.exam-timer {
  font-size: 1.2rem;
  font-weight: bold;
}

.exam-timer.warning {
  color: #dc3545;
}

/* 結果表示 */
.result-summary {
  background-color: #f8f9fa;
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.score-display {
  font-size: 2rem;
  font-weight: bold;
  margin: 1rem 0;
}

.explanation {
  padding: 10px;
  background-color: #f8f9fa;
  border-radius: 4px;
  margin-bottom: 10px;
}

/* 管理画面 */
.admin-sidebar {
  background-color: #343a40;
  min-height: calc(100vh - 56px);
  padding: 1rem 0;
}

.admin-sidebar .nav-link {
  color: rgba(255, 255, 255, 0.75);
  padding: 0.5rem 1rem;
}

.admin-sidebar .nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}

.admin-sidebar .nav-link.active {
  color: #fff;
  background-color: #0d6efd;
}