:root{
  --bg:#ffffff;--fg:#0d1117;--muted:#5b6672;--line:#e6e9ee;
  --accent:#0b6bcb;--accent-dark:#08529e;--card:#ffffff;
  --tint:#f6f8fb;--shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);
  --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
img{max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ── Header ─────────────────────────────────────────── */
.site-header{border-bottom:1px solid var(--line);background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(10px);position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--fg)}
.brand:hover{text-decoration:none}
.brand img{height:36px;width:auto;display:block}
.brand span{color:var(--muted);font-weight:500}
.site-header nav{display:flex;align-items:center;gap:6px;font-size:14.5px}
.site-header nav a{color:var(--muted);padding:8px 12px;border-radius:8px;transition:.15s}
.site-header nav a:hover{color:var(--fg);background:var(--tint);text-decoration:none}
.site-header nav a.cta{color:#fff;background:var(--accent);padding:9px 16px;font-weight:600}
.site-header nav a.cta:hover{background:var(--accent-dark);color:#fff}
.nav-toggle{display:none}

/* ── Hero ───────────────────────────────────────────── */
.hero{padding:56px 0 12px;max-width:720px}
.hero h1{font-size:clamp(32px,5vw,44px);line-height:1.12;letter-spacing:-.02em;margin:0 0 12px}
.hero p{color:var(--muted);margin:0;font-size:18px}

/* ── Card grid: two per row ─────────────────────────── */
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;padding:32px 0 48px}
.card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);
  display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease,border-color .18s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d6dbe4}
.card .thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--tint)}
.card .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease}
.card:hover .thumb img{transform:scale(1.04)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card time{color:var(--muted);font-size:13px;letter-spacing:.01em}
.card h2{font-size:21px;line-height:1.32;margin:8px 0 10px;letter-spacing:-.01em}
.card h2 a{color:var(--fg)}
.card h2 a:hover{color:var(--accent);text-decoration:none}
.card p{color:var(--muted);margin:0 0 16px;font-size:15px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.more{font-size:14px;font-weight:600;margin-top:auto}
.empty{color:var(--muted);padding:48px 0;text-align:center}

/* ── Post ───────────────────────────────────────────── */
.post{padding:34px 0 64px;max-width:760px;margin:0 auto}
.post h1{font-size:clamp(28px,4.4vw,38px);line-height:1.18;letter-spacing:-.02em;margin:10px 0 8px}
.post .meta{color:var(--muted);font-size:14px;margin:0 0 26px}
.post .back{font-size:14px;margin:0 0 10px}
.post .featured{width:100%;border-radius:var(--radius);margin:0 0 32px;display:block}
.content{font-size:17.5px}
.content h2{font-size:26px;margin:38px 0 12px;line-height:1.25;letter-spacing:-.01em}
.content h3{font-size:21px;margin:28px 0 8px}
.content p{margin:0 0 20px}
.content ul,.content ol{margin:0 0 20px;padding-left:26px}
.content li{margin:0 0 8px}
.content img{border-radius:10px;margin:24px 0;display:block}
.content blockquote{margin:24px 0;padding:4px 0 4px 20px;border-left:3px solid var(--accent);color:var(--muted)}
.content pre{background:#0d1117;color:#e6edf3;padding:16px 18px;border-radius:10px;overflow:auto;font-size:14px}
.content code{background:var(--tint);padding:2px 6px;border-radius:5px;font-size:.92em}
.content pre code{background:none;padding:0}
.content table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15px}
.content th,.content td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.content th{background:var(--tint);font-weight:600}
.content a{text-decoration:underline;text-underline-offset:2px}

/* ── Pager + footer ─────────────────────────────────── */
.pager{display:flex;gap:8px;justify-content:center;padding:0 0 48px}
.pager a,.pager span{padding:8px 14px;border:1px solid var(--line);border-radius:8px;font-size:14px;color:var(--muted)}
.pager .active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
.site-footer{border-top:1px solid var(--line);background:var(--tint);margin-top:24px}
.footer-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:28px 0}
.site-footer p{color:var(--muted);font-size:14px;margin:0}
.site-footer nav{display:flex;flex-wrap:wrap;gap:18px;font-size:14px}
.site-footer nav a{color:var(--muted)}

/* ── Responsive ─────────────────────────────────────── */
@media(max-width:820px){
  .grid{grid-template-columns:1fr;gap:20px}
  .header-inner{height:62px}
  .brand img{height:28px}
  .site-header nav a:not(.cta){display:none}
  .hero{padding:40px 0 4px}
}

/* Placeholder thumb for posts with no featured image — keeps the grid even. */
.card .thumb-empty{display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#0b6bcb 0%,#083f7d 100%)}
.card .thumb-empty span{color:rgba(255,255,255,.92);font-size:56px;font-weight:700;line-height:1}
.card .thumb-empty:hover{text-decoration:none}