/* ================================================================ blog (chỉ nạp ở trang blog) */
.blog-main { padding-top: 20px; padding-bottom: 40px; }
.crumbs { font-size: 13.5px; color: var(--dim); margin-bottom: 18px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); background: rgba(255,255,255,0.06); }
.blog-footer { grid-template-columns: 1.4fr 1fr 1fr; }

.blog-head { margin-bottom: 20px; }
.blog-head h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.2; margin: 0 0 10px; letter-spacing: -0.5px; }
.blog-head .lead { color: #c6d2df; font-size: 17px; max-width: 720px; margin: 0; }
.empty { color: var(--muted); padding: 30px 0; }

/* bài viết */
.post { max-width: 760px; margin: 0 auto; }
.post-head h1 { font-size: clamp(28px, 4.4vw, 42px); line-height: 1.18; margin: 0 0 10px; letter-spacing: -0.6px; }
.post-head .post-meta { font-size: 14px; margin-bottom: 20px; }
.post-cover { margin: 0 0 24px; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); aspect-ratio: 3 / 2; background: var(--bg-2); }
.post-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }

.toc { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 12px 18px; margin: 0 0 26px; }
.toc summary { cursor: pointer; font-weight: 800; }
.toc ol { margin: 10px 0 2px; padding-inline-start: 22px; display: grid; gap: 4px; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--text); }

.post-body { font-size: 17.5px; line-height: 1.75; color: #d3dde8; overflow-wrap: break-word; }
.post-body p { margin: 0 0 18px; }
.post-body h2 { font-size: clamp(23px, 3vw, 29px); line-height: 1.3; margin: 38px 0 14px; color: var(--text); scroll-margin-top: 12px; }
.post-body h3 { font-size: 20px; line-height: 1.35; margin: 28px 0 10px; color: var(--text); scroll-margin-top: 12px; }
.post-body h4 { font-size: 17.5px; margin: 22px 0 8px; color: var(--text); }
.post-body ul, .post-body ol { margin: 0 0 18px; padding-inline-start: 26px; }
.post-body li { margin-bottom: 8px; }
.post-body li::marker { color: var(--green); }
.post-body strong { color: var(--text); }
.post-body a { color: var(--teal); text-underline-offset: 3px; }
.post-body blockquote { margin: 0 0 18px; padding: 12px 18px; border-inline-start: 4px solid var(--green); background: rgba(124,255,107,0.06); border-radius: 0 12px 12px 0; }
.post-body blockquote p { margin: 0; }
.post-body code { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: .9em; }
.post-body hr { border: 0; border-top: 1px solid var(--line); margin: 30px 0; }
.post-body .table-wrap { overflow-x: auto; margin: 0 0 20px; }
.post-body table { border-collapse: collapse; width: 100%; font-size: 15.5px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.post-body th, .post-body td { text-align: start; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.post-body th { color: var(--text); background: var(--bg-2); }
.post-body tr:last-child td { border-bottom: 0; }
.post-figure { margin: 26px 0; }
.post-figure img { width: 100%; height: auto; display: block; border-radius: 14px; border: 1px solid var(--line); }
.post-figure figcaption { color: var(--dim); font-size: 14px; text-align: center; margin-top: 8px; }

.post-faq { margin-top: 36px; }
.post-faq h2 { font-size: clamp(23px, 3vw, 29px); margin: 0 0 14px; }
.post-faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; margin-bottom: 10px; }
.post-faq summary { cursor: pointer; font-weight: 700; }
.post-faq p { color: #c6d2df; margin: 10px 0 0; }
.credit { color: var(--dim); font-size: 13px; margin-top: 24px; }
.credit a { color: var(--muted); }

.play-cta { max-width: 760px; margin: 36px auto; display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(124,255,107,0.12), rgba(34,211,238,0.10)); border: 1px solid rgba(124,255,107,0.35); border-radius: 18px; padding: 20px 24px; }
.play-cta h2 { font-size: 22px; margin: 0 0 4px; }
.play-cta p { color: #c6d2df; margin: 0; }
.btn-play { background: var(--green); color: #062014; font-weight: 900; text-decoration: none; padding: 12px 20px; border-radius: 12px; white-space: nowrap; }
.btn-play:hover { filter: brightness(1.08); }

.related { max-width: 1120px; margin: 0 auto; padding-top: 10px; }
.related h2 { font-size: 24px; margin: 0 0 12px; }

@media (max-width: 760px) {
  .blog-footer { grid-template-columns: 1fr 1fr; }
  .post-body { font-size: 16.5px; }
  .play-cta { padding: 18px; }
  .btn-play { width: 100%; text-align: center; }
}