/* T21 - chi tiết bài viết */
.article-wrap { padding: 32px 0 56px; }
.article { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: clamp(20px, 4vw, 44px); min-width: 0; }
.article__cat { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--brand-text); margin-bottom: 12px; }
.article h1 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; line-height: 1.25; }
.article__meta { display: flex; flex-wrap: wrap; gap: 6px 14px; color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.article__lead { font-size: 18px; color: var(--gray-dk); border-left: 4px solid var(--brand); padding-left: 16px; }
.article__cover { margin: 24px 0; }
.article__cover img { width: 100%; border-radius: var(--radius); aspect-ratio: 1200 / 630; object-fit: cover; }
.article__icon { width: 64px; height: 64px; display: grid; place-items: center; font-size: 32px; border-radius: 16px; background: var(--brand-soft); margin-bottom: 18px; }
.article__body { font-size: 17px; line-height: 1.8; overflow-wrap: break-word; }
.article__body h2 { font-size: clamp(22px, 3vw, 28px); margin: 1.6em 0 .6em; padding-top: .2em; }
.article__body h3 { font-size: 20px; margin: 1.4em 0 .5em; }
.article__body h4 { font-size: 17px; margin: 1.2em 0 .4em; color: var(--ink-2); }
.article__body ul, .article__body ol { padding-left: 24px; margin: 0 0 1.2em; }
.article__body li { margin-bottom: .45em; }
.article__body li::marker { color: var(--brand); font-weight: 700; }
.article__body a { color: var(--brand-text); text-decoration: underline; text-underline-offset: 3px; }
.article__body a:hover { color: var(--brand-dk); }
.article__body blockquote { margin: 1.4em 0; padding: 16px 20px; background: var(--brand-soft); border-left: 4px solid var(--brand); border-radius: 0 var(--radius) var(--radius) 0; color: var(--ink-2); }
.article__body img { border-radius: var(--radius); border: 1px solid var(--line); margin: 8px auto; }
.article__body pre { background: var(--ink); color: #F5EDE6; padding: 18px; border-radius: var(--radius); overflow-x: auto; font-size: 14px; line-height: 1.6; white-space: pre; }
.article__body code { font-family: Consolas, 'Courier New', monospace; font-size: .9em; background: var(--off); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
.article__body pre code { background: none; border: 0; padding: 0; }
.article__body iframe { width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: var(--radius); margin: 1em 0; }
.article__body p:has(> em:only-child) { color: var(--muted); font-size: 14px; text-align: center; margin-top: -4px; }
.article__end { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; border-top: 1px solid var(--line); margin-top: 32px; padding-top: 20px; font-size: 14px; color: var(--muted); }
.toc { display: none; }
.toc.is-ready { display: block; }
.toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 2px; font-size: 14px; max-height: 50vh; overflow-y: auto; }
.toc a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--gray-dk); border-left: 2px solid transparent; }
.toc a:hover, .toc a.is-active { background: var(--brand-soft); color: var(--brand-text); border-left-color: var(--brand); }
.toc .toc-sub a { padding-left: 22px; font-size: 13px; }
.related { margin-top: 28px; }
.related h2 { font-size: 22px; }
@media (max-width: 900px) {
    .article__body { font-size: 16px; }
    .toc ol { max-height: none; }
}