/* Stylish Post Blocks - フロントエンドスタイル */

.spb-block-wrapper {
    padding: 60px 0;
    margin: 0;
    transition: background-color 0.3s ease;
}

.spb-block-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー部分 */
.spb-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
}

.spb-block-title {
    font-size: 32px;
    font-weight: 700;
    margin: 0;
    color: #1a1a1a;
    letter-spacing: -0.02em;
}

.spb-more-link {
    font-size: 16px;
    color: #4a5568;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 6px;
    background-color: rgba(0, 0, 0, 0.02);
}

.spb-more-link:hover {
    color: #2d3748;
    background-color: rgba(0, 0, 0, 0.05);
    transform: translateX(4px);
}

/* グリッドレイアウト */
.spb-posts-grid {
    display: grid;
    gap: 24px;
    margin: 0;
}

@media (max-width: 968px) {
    .spb-posts-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 640px) {
    .spb-posts-grid {
        grid-template-columns: 1fr !important;
    }
}

/* 投稿カード */
.spb-post-card {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.spb-post-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.spb-post-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* 画像部分 */
.spb-post-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 75%; /* 4:3 aspect ratio */
    overflow: hidden;
    background-color: #e2e8f0;
}

.spb-post-image,
.spb-post-image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.spb-post-card:hover .spb-post-image {
    transform: scale(1.08);
}

.spb-post-image-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 画像上のオーバーレイ要素 */
.spb-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 50%, transparent 100%);
}

.spb-post-title-overlay {
    color: #ffffff;
    font-size: 18px;
    font-weight: 700;
    margin: 0;
    line-height: 1.4;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.spb-date-overlay {
    position: absolute;
    top: 16px;
    right: 16px;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    color: #ffffff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* コンテンツ部分 */
.spb-post-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.spb-post-title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 12px 0;
    line-height: 1.5;
    color: #1a202c;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.spb-post-excerpt {
    font-size: 14px;
    line-height: 1.7;
    color: #4a5568;
    margin: 0 0 16px 0;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* メタ情報 */
.spb-post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid #e2e8f0;
}

.spb-post-date {
    font-size: 13px;
    color: #718096;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* タグ */
.spb-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.spb-tag {
    display: inline-block;
    padding: 4px 10px;
    background-color: #edf2f7;
    color: #4a5568;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.spb-post-card:hover .spb-tag {
    background-color: #e2e8f0;
    color: #2d3748;
}

/* 投稿なしメッセージ */
.spb-no-posts {
    text-align: center;
    padding: 60px 20px;
    color: #718096;
    font-size: 16px;
}

/* レスポンシブ調整 */
@media (max-width: 640px) {
    .spb-block-wrapper {
        padding: 40px 0;
    }
    
    .spb-block-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        margin-bottom: 30px;
    }
    
    .spb-block-title {
        font-size: 24px;
    }
    
    .spb-more-link {
        font-size: 14px;
    }
    
    .spb-posts-grid {
        gap: 16px;
    }
    
    .spb-post-content {
        padding: 20px;
    }
    
    .spb-post-title {
        font-size: 16px;
    }
    
    .spb-post-excerpt {
        font-size: 13px;
    }
}

/* ダークモード対応（オプション） */
@media (prefers-color-scheme: dark) {
    .spb-block-title {
        color: #f7fafc;
    }
    
    .spb-post-card {
        background: #2d3748;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    }
    
    .spb-post-title {
        color: #f7fafc;
    }
    
    .spb-post-excerpt {
        color: #cbd5e0;
    }
    
    .spb-post-date {
        color: #a0aec0;
    }
    
    .spb-tag {
        background-color: #4a5568;
        color: #e2e8f0;
    }
    
    .spb-post-meta {
        border-top-color: #4a5568;
    }
}