:root{
  --fg:#16181d; --muted:#6a7080; --bg:#fff; --card:#fff;
  --line:#e6e8ec; --accent:#1a56db; --radius:10px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--fg:#e6e8ec; --muted:#98a0b0; --bg:#111318; --card:#171a20; --line:#262a33; --accent:#7aa2f7}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.7 var(--font);
  text-rendering:optimizeLegibility}
.shell{max-width:760px;margin:0 auto;padding:0 20px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-head{border-bottom:1px solid var(--line);padding:22px 0;margin-bottom:36px}
.brand{font-size:1.3rem;font-weight:700;color:var(--fg)}
.brand-sub{margin:4px 0 0;color:var(--muted);font-size:.9rem}
.site-nav{margin-top:10px;display:flex;gap:18px;font-size:.9rem}
.site-foot{border-top:1px solid var(--line);margin-top:64px;padding:28px 0;
  color:var(--muted);font-size:.85rem}

.meta{color:var(--muted);font-size:.85rem;margin:6px 0}
.meta a{color:var(--muted)}
.dek{color:var(--muted);font-size:1.05rem;margin:8px 0 0}
.empty{color:var(--muted);padding:40px 0;text-align:center}

.card{border-bottom:1px solid var(--line);padding:22px 0;display:grid;gap:16px}
.card:last-of-type{border-bottom:0}
@media (min-width:620px){.card:has(.card-img){grid-template-columns:200px 1fr}}
.card-img img{border-radius:var(--radius);aspect-ratio:16/10;object-fit:cover;width:100%}
.card h2{font-size:1.2rem;line-height:1.35;margin:0 0 4px}
.card h2 a{color:var(--fg)}
.excerpt{margin:8px 0 0;color:var(--muted)}

.page-head{margin-bottom:28px}
.page-head h1{font-size:1.6rem;margin:0}

.post-head h1{font-size:2rem;line-height:1.25;margin:0 0 10px;letter-spacing:-.02em}
.cover{margin:28px 0}
.cover img{border-radius:var(--radius);width:100%}
.cover figcaption{color:var(--muted);font-size:.85rem;margin-top:8px}

.prose{font-size:1.06rem}
.prose h2{font-size:1.4rem;margin:2em 0 .5em;letter-spacing:-.01em}
.prose h3{font-size:1.15rem;margin:1.6em 0 .4em}
.prose p{margin:1.1em 0}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.4em 0}
.prose img{border-radius:var(--radius);margin:1.6em 0}
.prose blockquote{margin:1.6em 0;padding:2px 0 2px 18px;border-left:3px solid var(--accent);
  color:var(--muted);font-style:italic}
.prose pre{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;overflow:auto;font-size:.9rem}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.95rem}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}

/* Khối do core sinh ra từ directive — style bằng data-* để không phụ thuộc tên class */
[data-note]{margin:1.6em 0;padding:14px 18px;border-radius:var(--radius);
  border-left:3px solid var(--accent);background:var(--card)}
[data-note] p{margin:.4em 0}
[data-note="warning"]{border-left-color:#d97706}
[data-note="danger"]{border-left-color:#dc2626}
[data-embed]{margin:1.8em 0}
[data-embed] iframe{width:100%;aspect-ratio:16/9;height:auto;border:0;border-radius:var(--radius)}
[data-gallery]{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;margin:1.8em 0}
[data-gallery] img{margin:0;height:100%;object-fit:cover}
[data-toc]{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 18px;margin:1.8em 0;font-size:.95rem}
[data-toc] ol{margin:0;padding-left:1.2em}
[data-faq] details{border-bottom:1px solid var(--line);padding:12px 0}
[data-faq] summary{cursor:pointer;font-weight:600}

.post-foot{margin-top:40px;padding-top:20px;border-top:1px solid var(--line)}
.tags{display:flex;flex-wrap:wrap;gap:10px;font-size:.9rem;margin:0}
.source{color:var(--muted);font-size:.85rem}

.pager{display:flex;justify-content:space-between;align-items:center;gap:16px;
  margin:44px 0;font-size:.92rem}
.pager-count{color:var(--muted)}

.search{display:flex;gap:8px;margin-bottom:28px}
.search input{flex:1;padding:10px 14px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--card);color:var(--fg);font:inherit}
.search button{padding:10px 20px;border:0;border-radius:var(--radius);
  background:var(--accent);color:#fff;font:inherit;cursor:pointer}

@media (prefers-reduced-motion:no-preference){
  @view-transition{navigation:auto}
}