/* Default blog theme — neutral, RTL-first, no external requests. */
:root{
  --bg:#ffffff;
  --surface:#f7f8fa;
  --border:#e4e7ec;
  --text:#16191f;
  --muted:#5b6472;
  --accent:#1f6feb;
  --accent-ink:#ffffff;
  --radius:14px;
  --maxw:1120px;
  --font:"Vazirmatn","IRANSans","Segoe UI",system-ui,-apple-system,"Noto Sans Arabic",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:17px;line-height:1.85;
}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:20px}

/* header / footer ---------------------------------------------------- */
.blog-header{border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:20}
.blog-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;flex-wrap:wrap}
.brand{font-weight:800;font-size:19px;color:var(--text);display:flex;align-items:center;gap:10px}
.brand:hover{text-decoration:none}
.blog-nav{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}
.blog-nav a{color:var(--muted)}
.blog-nav a:hover{color:var(--accent)}

.blog-footer{margin-top:64px;border-top:1px solid var(--border);background:var(--surface);padding-block:28px;color:var(--muted);font-size:14px}
.blog-footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-links{display:flex;gap:16px;margin:0}
.blog-footer p{margin:0}

/* breadcrumbs -------------------------------------------------------- */
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:14px;color:var(--muted);margin:22px 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb .current{color:var(--text);font-weight:600}

/* article ------------------------------------------------------------ */
.post{max-width:820px;margin-inline:auto}
.post-head h1{font-size:clamp(28px,4.2vw,42px);line-height:1.35;margin:10px 0 14px;letter-spacing:-.01em}
.post-cat{display:inline-block;background:var(--surface);border:1px solid var(--border);color:var(--muted);
  border-radius:999px;padding:4px 14px;font-size:13px}
.post-lede{font-size:19px;color:var(--muted);margin:0 0 18px}
.post-meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:14px;
  padding-bottom:20px;border-bottom:1px solid var(--border)}
.post-meta .author a{color:var(--muted);font-weight:600}

.post-hero{margin:26px 0;text-align:center}
.post-hero img{border-radius:var(--radius);width:100%}
.post-hero figcaption{font-size:14px;color:var(--muted);margin-top:10px}

.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin:28px 0}
.toc-title{font-size:16px;margin:0 0 10px}
.toc ol{margin:0;padding-inline-start:20px}
.toc li{margin:5px 0}
.toc .toc-l3{padding-inline-start:16px;font-size:15px;color:var(--muted)}
.toc .toc-l4{padding-inline-start:32px;font-size:14px;color:var(--muted)}

.post-body{font-size:17.5px}
.post-body h2{font-size:27px;line-height:1.45;margin:38px 0 12px;scroll-margin-top:80px}
.post-body h3{font-size:22px;line-height:1.5;margin:28px 0 10px;scroll-margin-top:80px}
.post-body h4{font-size:19px;margin:22px 0 8px;scroll-margin-top:80px}
.post-body p{margin:0 0 18px}
.post-body ul,.post-body ol{margin:0 0 20px;padding-inline-start:26px}
.post-body li{margin:7px 0}
.post-body img{border-radius:10px;margin:8px 0}
.post-body figure{margin:26px 0;text-align:center}
.post-body figcaption{font-size:14px;color:var(--muted);margin-top:8px}
.post-body blockquote{margin:24px 0;padding:14px 22px;border-inline-start:4px solid var(--accent);
  background:var(--surface);border-radius:0 var(--radius) var(--radius) 0;color:var(--muted)}
.post-body blockquote p:last-child{margin-bottom:0}
.post-body hr{border:0;border-top:1px solid var(--border);margin:34px 0}
.post-body pre{background:#12151b;color:#e6edf3;padding:16px 18px;border-radius:10px;overflow-x:auto;direction:ltr;text-align:left}
.post-body code{background:var(--surface);padding:2px 6px;border-radius:5px;font-size:.9em}
.post-body pre code{background:none;padding:0}

/* tables must scroll rather than break the page */
.post-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:16px;display:block;overflow-x:auto}
.post-body th,.post-body td{border:1px solid var(--border);padding:10px 14px;text-align:start}
.post-body thead th{background:var(--surface);font-weight:700}
.post-body tbody tr:nth-child(even){background:#fbfcfd}

.post-tags{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:34px 0;font-size:14px;color:var(--muted)}
.post-tags a{background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:4px 13px;color:var(--muted)}
.post-tags a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}

.author-box{display:flex;gap:16px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;margin:34px 0}
.author-box img{border-radius:50%;flex:0 0 auto}
.author-box p{margin:6px 0 0;color:var(--muted);font-size:15px}
.author-role{display:block;font-size:13px;color:var(--muted)}

/* cards -------------------------------------------------------------- */
.page-head{margin:26px 0 30px}
.page-head h1{font-size:clamp(26px,3.6vw,36px);margin:0 0 8px}
.page-lede{color:var(--muted);margin:0;font-size:17px}

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:24px}
.card{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg);
  display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s;min-width:0}
.card:hover{box-shadow:0 8px 28px rgba(16,24,40,.09);transform:translateY(-2px)}
.card-media{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--surface)}
.card-media img{width:100%;height:100%;object-fit:cover;display:block}
.card-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1;min-width:0}
.card-cat{font-size:12.5px;color:var(--accent)}
.card-title{font-size:19px;line-height:1.55;margin:0}
.card-title a{color:var(--text)}
.card-title a:hover{color:var(--accent);text-decoration:none}
.card-excerpt{margin:0;color:var(--muted);font-size:15px;line-height:1.75}
.card-meta{margin-top:auto;padding-top:8px;display:flex;gap:14px;color:var(--muted);font-size:13px}

.related{margin-top:56px}
.related h2{font-size:24px;margin:0 0 18px}

.pagination{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;margin:44px 0 0}
.pagination .page,.pagination .page-prev,.pagination .page-next{
  border:1px solid var(--border);border-radius:9px;padding:8px 14px;color:var(--muted);font-size:15px;min-width:42px;text-align:center}
.pagination .current{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:700}
.pagination a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}

.empty{text-align:center;color:var(--muted);padding:60px 0}

@media (max-width:640px){
  body{font-size:16px}
  .post-body{font-size:16.5px}
  .card-grid{grid-template-columns:1fr}
  .blog-header .wrap{min-height:56px}
}

@media print{
  .blog-header,.blog-footer,.toc,.related,.pagination{display:none}
  body{font-size:12pt}
}