/* ============================================================
   POST & PAGE CSS
   Màu: --color-blue #002147 | --color-red #BB133E
   Dùng kèm style.css (có khai báo :root variables)
============================================================ */

/* ===== BREADCRUMB ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--color-muted);
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--color-muted);
    text-decoration: none;
    transition: color .15s;
}

.breadcrumb a:hover { color: var(--color-blue); }

.breadcrumb span { color: var(--color-text); }

/* ===== LAYOUT ===== */
.post-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 32px;
    align-items: start;
}

/* ===== MAIN ARTICLE ===== */
.post-main {
    min-width: 0;
}

/* ===== TITLE ===== */
.post-title {
    font-size: 1.9rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--color-blue);
    margin: 0 0 14px;
}

/* ===== META ===== */
.post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.82rem;
    color: var(--color-muted);
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.post-category {
    background: var(--color-blue);
    color: #fff;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-decoration: none;
    transition: background .15s;
}

.post-category:hover { background: var(--color-red); color: #fff; }

/* ===== THUMBNAIL ===== */
.post-thumb {
    margin-bottom: 24px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.post-thumb img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* ===== CONTENT ===== */
.post-content, .post-content table p {
    font-size: 1rem;
    line-height: 1.85;
}

.post-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-blue);
    margin: 2rem 0 0.8rem;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-red);
    display: inline-block;
}

.post-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-blue);
    margin: 1.6rem 0 0.6rem;
}

.post-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 1.2rem 0 0.5rem;
}

.post-content p { margin-bottom: 1rem; }

.post-content a {
    color: var(--color-blue);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.post-content a:hover { color: var(--color-red); }

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    margin: 8px 0;
}

.post-content ul,
.post-content ol {
    padding-left: 24px;
    margin-bottom: 1rem;
    font-size:1rem;
}

.post-content li { margin-bottom: 6px;}

.post-content blockquote {
    border-left: 4px solid var(--color-blue);
    margin: 1.2rem 0;
    padding: 12px 20px;
    background: var(--color-bg-2);
    border-radius: 0 8px 8px 0;
    color: var(--color-muted);
    font-style: italic;
}

.post-content strong { color: var(--color-text); }

.post-content code {
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.88em;
    font-family: monospace;
    color: var(--color-red);
}

.post-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 16px 20px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 0.88rem;
    margin: 1rem 0;
}

.post-content pre code {
    background: none;
    color: inherit;
    padding: 0;
}

/* ===== TABLE ===== */
.post-content table,
.post-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.2rem 0;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}

.post-content table thead tr,
.post-table thead tr {
    background: #f1f5f9;
}

.post-content table th,
.post-table th {
    padding: 11px 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    font-size: 0.9rem;
    text-align: left;
    white-space: nowrap;
}

.post-content table td,
.post-table td {
    padding: 11px 14px;
    border-bottom: 1px solid #eef2f7;
    vertical-align: middle;
}

.post-content table tbody tr:last-child td,
.post-table tbody tr:last-child td { border-bottom: none; }

.post-content table tbody tr:hover,
.post-table tbody tr:hover { background: #f8fbff; }

.post-content table tbody tr:nth-child(even),
.post-table tbody tr:nth-child(even) { background: #fcfcfd; }

/* ===== PREV / NEXT ===== */
.post-nav {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.post-nav a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text);
    font-size: 0.88rem;
    font-weight: 600;
    max-width: 48%;
    transition: border-color .15s, background .15s, color .15s;
    background: #fff;
}

.post-nav a:hover {
    border-color: var(--color-blue);
    color: var(--color-blue);
    background: #f0f4fa;
}

.post-nav .prev { text-align: left; }
.post-nav .next { text-align: right; margin-left: auto; }

/* ===== SIDEBAR ===== */
.post-sidebar {
    position: sticky;
    top: 110px;
}

.post-sidebar h3 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--color-muted);
    margin: 0 0 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

.related-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    text-decoration: none;
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
    transition: opacity .15s;
}

.related-item:hover { opacity: .75; }

.related-item:last-child { border-bottom: none; }

.related-thumb {
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
    border: 1px solid var(--color-border);
}

.related-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== PAGE (type=page) ===== */
.page-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 32px 20px 60px;
}

.page-header { margin-bottom: 24px; }

.page-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-blue);
    line-height: 1.3;
    margin: 0 0 8px;
}

.page-meta {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.page-content {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--color-text);
}

/* page-content dùng chung các rule post-content */
.page-content h2        { font-size: 1.5rem; font-weight: 700; color: var(--color-blue); margin: 2rem 0 .8rem; border-bottom: 2px solid var(--color-red); padding-bottom: 8px; display: inline-block; }
.page-content h3        { font-size: 1.3rem; font-weight: 700; color: var(--color-blue); margin: 1.6rem 0 .6rem; }
.page-content p         { margin-bottom: 1rem; }
.page-content a         { color: var(--color-blue); text-decoration: underline; text-underline-offset: 3px; }
.page-content a:hover   { color: var(--color-red); }
.page-content img       { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--color-border); margin: 8px 0; }
.page-content ul,
.page-content ol        { padding-left: 24px; margin-bottom: 1rem; }
.page-content li        { margin-bottom: 6px; }
.page-content blockquote{ border-left: 4px solid var(--color-blue); margin: 1.2rem 0; padding: 12px 20px; background: var(--color-bg-2); border-radius: 0 8px 8px 0; color: var(--color-muted); font-style: italic; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .post-layout {
        grid-template-columns: 1fr;
    }

    .post-sidebar {
        position: static;
        border-top: 1px solid var(--color-border);
        padding-top: 24px;
        margin-top: 8px;
    }

    .post-sidebar h3 { margin-bottom: 12px; }
}

@media (max-width: 640px) {
    .post-title  { font-size: 1.9rem; }
    .page-title  { font-size: 1.9rem; }
    .post-nav a  { padding: 10px 12px; font-size: 0.8rem; }
    .post-container,
    .page-container { padding: 16px 14px 40px; }
}