/**
 * パンくずリスト（Breadcrumb Navigation）
 * Version: 5.23.0
 * Created: 2026-10-11
 * 
 * 目的: SEO効果とユーザビリティ向上
 * 機能: 自動生成されるパンくずナビゲーション
 */

/* ========================================
   パンくずリストコンテナ
   ======================================== */

.breadcrumb-container,
.breadcrumb-wrapper {
    background: linear-gradient(135deg, #F7FAFC 0%, #EDF2F7 100%);
    border-bottom: 1px solid #E2E8F0;
    padding: 12px 0;
    margin: 0;
}

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0;
    list-style: none;
    font-size: 0.9rem;
    color: #4A5568;
}

/* ========================================
   パンくず項目
   ======================================== */

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-item a {
    color: #2C7A7B;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 4px;
}

.breadcrumb-item a:hover {
    color: #234E52;
    background: rgba(79, 209, 197, 0.1);
    text-decoration: none;
}

.breadcrumb-item a:focus {
    outline: 2px solid #4FD1C5;
    outline-offset: 2px;
}

/* 現在のページ（最後の項目） */
.breadcrumb-item.active {
    color: #2D3748;
    font-weight: 600;
    pointer-events: none;
}

/* ========================================
   区切り記号
   ======================================== */

.breadcrumb-separator {
    color: #A0AEC0;
    font-size: 0.8rem;
    user-select: none;
}

/* Font Awesomeアイコン使用時 */
.breadcrumb-separator i {
    font-size: 0.75rem;
}

/* ========================================
   ホームアイコン
   ======================================== */

.breadcrumb-home-icon {
    font-size: 1rem;
    color: #2C7A7B;
}

.breadcrumb-item a .breadcrumb-home-icon {
    margin-right: 4px;
}

/* ========================================
   構造化データマークアップ（非表示）
   ======================================== */

.breadcrumb-schema {
    display: none;
}

/* ========================================
   レスポンシブ対応
   ======================================== */

/* タブレット */
@media (max-width: 768px) {
    .breadcrumb-container,
    .breadcrumb-wrapper {
        padding: 10px 0;
    }
    
    .breadcrumb {
        font-size: 0.85rem;
        gap: 6px;
    }
    
    .breadcrumb-item a {
        padding: 3px 6px;
    }
}

/* スマートフォン */
@media (max-width: 480px) {
    .breadcrumb-container,
    .breadcrumb-wrapper {
        padding: 8px 0;
    }
    
    .breadcrumb {
        font-size: 0.8rem;
        gap: 4px;
    }
    
    .breadcrumb-item a {
        padding: 2px 4px;
    }
    
    .breadcrumb-separator {
        font-size: 0.7rem;
    }
    
    .breadcrumb-home-icon {
        font-size: 0.9rem;
    }
}

/* 極小デバイス */
@media (max-width: 360px) {
    .breadcrumb {
        font-size: 0.75rem;
    }
}

/* ========================================
   アニメーション
   ======================================== */

@keyframes breadcrumbFadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.breadcrumb-container,
.breadcrumb-wrapper {
    animation: breadcrumbFadeIn 0.3s ease;
}

/* ========================================
   ダークモード対応（将来用）
   ======================================== */

@media (prefers-color-scheme: dark) {
    .breadcrumb-container,
    .breadcrumb-wrapper {
        background: linear-gradient(135deg, #1A202C 0%, #2D3748 100%);
        border-bottom-color: #4A5568;
    }
    
    .breadcrumb {
        color: #E2E8F0;
    }
    
    .breadcrumb-item a {
        color: #4FD1C5;
    }
    
    .breadcrumb-item a:hover {
        color: #81E6D9;
        background: rgba(79, 209, 197, 0.2);
    }
    
    .breadcrumb-item.active {
        color: #F7FAFC;
    }
    
    .breadcrumb-separator {
        color: #718096;
    }
}