/* ==============================
   BIM業界ニュースページ専用スタイル
   ============================== */

/* ページヘッダー */
.page-header {
    margin-bottom: 30px;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--concrete-gray);
    margin-bottom: 12px;
    font-family: 'Noto Sans JP', sans-serif;
}

.page-description {
    font-size: 1rem;
    color: var(--steel-blue);
    margin-bottom: 30px;
    font-family: 'Noto Sans JP', sans-serif;
}

/* 更新情報 */
.news-update-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    margin-bottom: 30px;
    font-size: 0.9rem;
    color: rgba(0, 0, 0, 0.7);
}

.news-update-info .update-icon {
    font-size: 1.2rem;
}

.news-update-info #last-update-time {
    color: var(--blueprint-blue);
    font-weight: 500;
}

.news-update-info .update-note {
    color: rgba(0, 0, 0, 0.5);
    font-size: 0.85rem;
}

/* カテゴリフィルター */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    padding: 20px;
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.filter-btn {
    padding: 10px 20px;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    color: var(--concrete-gray);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Noto Sans JP', 'Inter', sans-serif;
}

.filter-btn:hover {
    background: rgba(52, 152, 219, 0.1);
    border-color: var(--blueprint-blue);
    color: var(--blueprint-blue);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--blueprint-blue);
    border-color: var(--blueprint-blue);
    color: #fff;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

/* ニュースグリッド */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

/* ニュースカード */
.news-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-color: var(--blueprint-blue);
}

/* サムネイル */
.news-card-thumbnail {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.15), rgba(41, 128, 185, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.news-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-card-thumbnail.no-image {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(41, 128, 185, 0.1));
}

.news-card-thumbnail.no-image::before {
    content: '📰';
    font-size: 3rem;
    opacity: 0.3;
}

/* カード本文 */
.news-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

/* カテゴリバッジ */
.news-card-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(52, 152, 219, 0.15);
    border: 1px solid rgba(52, 152, 219, 0.3);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--blueprint-blue);
    width: fit-content;
}

/* カテゴリ別の色 */
.news-card-category.bim {
    background: rgba(52, 152, 219, 0.15);
    border-color: rgba(52, 152, 219, 0.3);
    color: var(--blueprint-blue);
}

.news-card-category.revit {
    background: rgba(231, 76, 60, 0.15);
    border-color: rgba(231, 76, 60, 0.3);
    color: #e74c3c;
}

.news-card-category.software {
    background: rgba(241, 196, 15, 0.15);
    border-color: rgba(241, 196, 15, 0.3);
    color: #f1c40f;
}

.news-card-category.architecture {
    background: rgba(26, 188, 156, 0.15);
    border-color: rgba(26, 188, 156, 0.3);
    color: #1abc9c;
}

/* タイトル */
.news-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--concrete-gray);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.news-card-title a:hover {
    color: var(--blueprint-blue);
}

/* 概要 */
.news-card-description {
    font-size: 0.9rem;
    line-height: 1.6;
    color: rgba(0, 0, 0, 0.6);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}

/* メタ情報 */
.news-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 0.85rem;
    color: rgba(0, 0, 0, 0.5);
    margin-top: auto;
}

.news-card-date {
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-card-date::before {
    content: '📅';
}

.news-card-source {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    color: rgba(0, 0, 0, 0.6);
}

.news-card-source::before {
    content: '🔗';
}

/* ローディング・エラー・空メッセージ */
.loading-message,
.error-message,
.empty-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: rgba(0, 0, 0, 0.5);
}

.loading-spinner {
    font-size: 2rem;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.error-icon,
.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
}

.error-message p,
.empty-message p {
    font-size: 1rem;
    margin: 0;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .category-filter {
        padding: 15px;
        gap: 8px;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .news-card-thumbnail {
        height: 160px;
    }

    .news-card-body {
        padding: 16px;
        gap: 10px;
    }

    .news-card-title {
        font-size: 1rem;
    }

    .news-card-description {
        font-size: 0.85rem;
    }

    .news-update-info {
        flex-wrap: wrap;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .news-card-thumbnail {
        height: 140px;
    }

    .news-card-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}