/* public/css/modules/blog.css
 * Giao diện công khai module Blog — Trợ Lý Giáo Viên
 */

:root {
    --blog-primary: #667eea;
    --blog-primary-dark: #764ba2;
    --blog-ink: #1f2937;
    --blog-muted: #6b7280;
    --blog-bg: #f7f8fc;
    --blog-border: #e5e7eb;
}

.blog-body {
    background: var(--blog-bg);
    color: var(--blog-ink);
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
}

/* ===== Navbar ===== */
.blog-navbar {
    background: #fff;
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid var(--blog-border);
}
.blog-navbar .navbar-brand {
    color: var(--blog-ink);
    font-size: 1.25rem;
}
.blog-navbar .nav-link {
    color: var(--blog-muted);
    font-weight: 500;
}
.blog-navbar .nav-link:hover {
    color: var(--blog-primary);
}

/* ===== Hero danh mục / tiêu đề trang ===== */
.blog-hero {
    background: linear-gradient(135deg, var(--blog-primary) 0%, var(--blog-primary-dark) 100%);
    color: #fff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    margin-bottom: 2rem;
}
.blog-hero h1 { font-weight: 700; margin-bottom: .5rem; }
.blog-hero p { opacity: .92; margin-bottom: 0; }

/* ===== Card bài viết ===== */
.post-card {
    background: #fff;
    border: 1px solid var(--blog-border);
    border-radius: 14px;
    overflow: hidden;
    height: 100%;
    transition: transform .2s ease, box-shadow .2s ease;
    display: flex;
    flex-direction: column;
}
.post-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(102, 126, 234, 0.18);
}
.post-card .post-thumb {
    aspect-ratio: 16 / 9;
    width: 100%;
    object-fit: cover;
    background: linear-gradient(135deg, #e0e7ff, #f3e8ff);
}
.post-card .post-thumb-placeholder {
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--blog-primary), var(--blog-primary-dark));
    color: rgba(255, 255, 255, 0.85);
    font-size: 2.5rem;
}
.post-card .card-body { padding: 1.15rem 1.25rem; display: flex; flex-direction: column; flex: 1; }
.post-card .post-cat {
    display: inline-block;
    font-size: .72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--blog-primary);
    margin-bottom: .5rem;
}
.post-card .post-title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: .5rem;
}
.post-card .post-title a { color: var(--blog-ink); text-decoration: none; }
.post-card .post-title a:hover { color: var(--blog-primary); }
.post-card .post-excerpt {
    color: var(--blog-muted);
    font-size: .92rem;
    margin-bottom: 1rem;
    flex: 1;
}
.post-card .post-meta {
    font-size: .8rem;
    color: var(--blog-muted);
    display: flex;
    gap: 1rem;
    align-items: center;
}
.post-card .badge-featured {
    position: absolute;
    top: 10px; left: 10px;
    background: #f59e0b;
    color: #fff;
    font-size: .7rem;
    padding: .25rem .6rem;
    border-radius: 999px;
    z-index: 2;
}
.post-card { position: relative; }

/* ===== Sidebar ===== */
.blog-sidebar .widget {
    background: #fff;
    border: 1px solid var(--blog-border);
    border-radius: 14px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}
.blog-sidebar .widget h5 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: .6rem;
    border-bottom: 2px solid var(--blog-primary);
    display: inline-block;
}
.blog-sidebar .cat-list a,
.blog-sidebar .recent-list a {
    color: var(--blog-ink);
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: .5rem 0;
    border-bottom: 1px dashed var(--blog-border);
    font-size: .92rem;
}
/* Danh mục: tên bên trái, badge số bên phải */
.blog-sidebar .cat-list a { justify-content: space-between; }
/* Bài viết mới / liên quan: ảnh sát tiêu đề */
.blog-sidebar .recent-list a { gap: .6rem; }
.blog-sidebar .cat-list a:hover,
.blog-sidebar .recent-list a:hover { color: var(--blog-primary); }
.blog-sidebar .cat-list .count {
    background: #eef2ff;
    color: var(--blog-primary);
    border-radius: 999px;
    font-size: .75rem;
    padding: .1rem .55rem;
}
.blog-sidebar .recent-list .r-thumb {
    width: 56px; height: 56px; border-radius: 8px; object-fit: cover; flex-shrink: 0;
    background: linear-gradient(135deg, #e0e7ff, #f3e8ff);
}
.blog-sidebar .tag-cloud a {
    display: inline-block;
    background: #eef2ff;
    color: var(--blog-primary);
    padding: .3rem .7rem;
    border-radius: 999px;
    font-size: .8rem;
    margin: 0 .35rem .5rem 0;
    text-decoration: none;
}
.blog-sidebar .tag-cloud a:hover { background: var(--blog-primary); color: #fff; }

/* ===== Bài viết chi tiết ===== */
.post-article {
    background: #fff;
    border: 1px solid var(--blog-border);
    border-radius: 16px;
    padding: 2rem;
}
.post-article .article-header h1 {
    font-weight: 800;
    font-size: 2rem;
    line-height: 1.25;
    margin-bottom: 1rem;
}
.post-article .article-meta {
    color: var(--blog-muted);
    font-size: .9rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    align-items: center;
    padding-bottom: 1.25rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--blog-border);
}
.post-article .article-meta img.author-ava {
    width: 34px; height: 34px; border-radius: 50%; object-fit: cover; margin-right: .5rem;
}
.post-article .article-featured {
    width: 100%;
    border-radius: 12px;
    margin-bottom: 1.75rem;
}
.post-content {
    font-size: 1.05rem;
    color: #374151;
}
.post-content h2 { font-size: 1.5rem; font-weight: 700; margin: 1.75rem 0 .85rem; }
.post-content h3 { font-size: 1.25rem; font-weight: 700; margin: 1.5rem 0 .75rem; }
.post-content p { margin-bottom: 1.15rem; }
.post-content img { max-width: 100%; height: auto; border-radius: 10px; margin: 1rem 0; }
.post-content ul, .post-content ol { margin-bottom: 1.15rem; padding-left: 1.5rem; }
.post-content blockquote {
    border-left: 4px solid var(--blog-primary);
    background: #f8f9ff;
    padding: .85rem 1.25rem;
    color: #4b5563;
    border-radius: 0 8px 8px 0;
    margin: 1.25rem 0;
}
.post-content pre {
    background: #1f2937;
    color: #f3f4f6;
    padding: 1rem 1.25rem;
    border-radius: 10px;
    overflow-x: auto;
}
.post-content table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; }
.post-content table td, .post-content table th { border: 1px solid var(--blog-border); padding: .6rem .8rem; }

/* ===== Thẻ tag trong bài ===== */
.article-tags a {
    display: inline-block;
    background: #eef2ff;
    color: var(--blog-primary);
    padding: .3rem .8rem;
    border-radius: 999px;
    font-size: .85rem;
    margin: 0 .4rem .5rem 0;
    text-decoration: none;
}
.article-tags a:hover { background: var(--blog-primary); color: #fff; }

/* ===== Nút chia sẻ mạng xã hội ===== */
.share-buttons { display: flex; flex-wrap: wrap; gap: .6rem; }
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .5rem .9rem;
    border-radius: 8px;
    color: #fff;
    text-decoration: none;
    font-size: .88rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
}
.share-btn:hover { opacity: .9; color: #fff; }
.share-facebook { background: #1877f2; }
.share-twitter  { background: #000; }
.share-linkedin { background: #0a66c2; }
.share-telegram { background: #0088cc; }
.share-copy     { background: #6b7280; }

/* ===== Bình luận ===== */
.comments-section { margin-top: 2.5rem; }
.comment-item {
    display: flex;
    gap: .85rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--blog-border);
}
.comment-item .comment-avatar {
    width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0;
    background: linear-gradient(135deg, var(--blog-primary), var(--blog-primary-dark));
    color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700;
    object-fit: cover;
}
.comment-item .comment-body { flex: 1; }
.comment-item .comment-author { font-weight: 700; font-size: .95rem; }
.comment-item .comment-author .role-badge {
    font-size: .68rem; background: var(--blog-primary); color: #fff;
    padding: .05rem .5rem; border-radius: 999px; margin-left: .4rem; vertical-align: middle;
}
.comment-item .comment-date { color: var(--blog-muted); font-size: .8rem; }
.comment-item .comment-text { margin: .35rem 0 .5rem; color: #374151; }
.comment-item .btn-reply {
    background: none; border: none; color: var(--blog-primary);
    font-size: .82rem; font-weight: 600; padding: 0; cursor: pointer;
}
.comment-children { margin-left: 3rem; margin-top: .5rem; }

/* ===== Phân trang ===== */
.blog-pagination .page-link { color: var(--blog-primary); border-radius: 8px; margin: 0 .15rem; }
.blog-pagination .page-item.active .page-link {
    background: var(--blog-primary); border-color: var(--blog-primary);
}

/* ===== Responsive ===== */
@media (max-width: 767.98px) {
    .post-article { padding: 1.25rem; }
    .post-article .article-header h1 { font-size: 1.5rem; }
    .comment-children { margin-left: 1.25rem; }
}