/**
 * クイズ管理画面 専用スタイル
 */

/* 管理画面セクション */
.admin-section {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.action-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* 統計カード */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.stat-icon {
  font-size: 2.5rem;
}

.stat-info {
  flex: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--color-accent);
}

/* カテゴリー統計 */
.category-stats {
  margin-top: 2rem;
}

.category-stats h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.chart-container {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  min-height: 300px;
}

.chart-bar {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.chart-label {
  width: 120px;
  font-size: 0.875rem;
  color: var(--color-text);
}

.chart-bar-bg {
  flex: 1;
  height: 30px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.chart-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transition: width 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 0.5rem;
}

.chart-value {
  color: white;
  font-weight: bold;
  font-size: 0.875rem;
}

/* フィルターバー */
.filter-bar {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 200px;
  padding: 0.75rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(108, 125, 217, 0.1);
}

.filter-select {
  padding: 0.75rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* テーブル */
.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.questions-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg);
}

.questions-table thead {
  background: var(--color-surface);
}

.questions-table th {
  padding: 1rem;
  text-align: left;
  font-weight: bold;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
}

.questions-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.questions-table tbody tr:hover {
  background: var(--color-surface);
}

.question-preview {
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.difficulty-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: bold;
}

.difficulty-badge.easy { background: #27ae60; color: white; }
.difficulty-badge.normal { background: #3498db; color: white; }
.difficulty-badge.hard { background: #f39c12; color: white; }
.difficulty-badge.expert { background: #e74c3c; color: white; }

.table-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-icon {
  padding: 0.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  transition: transform 0.2s;
}

.btn-icon:hover {
  transform: scale(1.2);
}

/* モーダル */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  overflow-y: auto;
  padding: 2rem;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  margin: 0;
  color: var(--color-text);
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

/* フォーム */
.question-form {
  padding: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  font-weight: 500;
}

.required {
  color: var(--color-error);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-size: 1rem;
  font-family: inherit;
}

.form-group textarea {
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(108, 125, 217, 0.1);
}

.char-count {
  text-align: right;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* プレビュー */
.form-preview {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-preview h4 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.preview-card {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  padding: 1.5rem;
}

.preview-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.preview-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
  background: var(--color-accent);
  color: white;
}

.preview-question {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.preview-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.preview-option {
  padding: 0.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
}

.preview-explanation {
  padding: 1rem;
  background: var(--color-bg);
  border-left: 3px solid var(--color-accent);
  border-radius: 4px;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

/* インポート */
.import-container {
  padding: 1.5rem;
}

.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--border-radius);
  padding: 3rem;
  text-align: center;
  transition: all 0.3s;
}

.drop-zone.drag-over {
  border-color: var(--color-accent);
  background: rgba(108, 125, 217, 0.1);
}

.drop-zone-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.drop-zone p {
  color: var(--color-text);
  margin: 0.5rem 0;
}

.drop-zone-hint {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.import-preview {
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}

.import-stats {
  margin-bottom: 1rem;
}

.import-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1rem;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .section-header {
    flex-direction: column;
    align-items: stretch;
  }

  .action-buttons {
    flex-direction: column;
  }

  .filter-bar {
    flex-direction: column;
  }

  .search-input,
  .filter-select {
    width: 100%;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .questions-table {
    font-size: 0.875rem;
  }

  .questions-table th,
  .questions-table td {
    padding: 0.5rem;
  }

  .modal {
    padding: 1rem;
  }

  .modal-content {
    max-height: 95vh;
  }
}

@media (max-width: 480px) {
  .admin-section {
    padding: 1rem;
  }

  .stat-card {
    padding: 1rem;
  }

  .stat-icon {
    font-size: 2rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }
}