:root{
  --blue:#0676fd; --blue-dark:#0a64ea; --blue-deep:#1050bc;
  --ink:#09090b; --ink-soft:#28272a; --muted:#51525b; --muted-2:#71717a;
  --line:#e4e4e6; --bg:#ffffff; --bg-alt:#fafafa; --bg-soft:#eef8ff;
  --radius:14px; --radius-sm:10px; --maxw:1120px;
  --shadow:0 1px 2px rgba(9,9,11,.04),0 8px 24px rgba(9,9,11,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;
  font-size:17px;-webkit-font-smoothing:antialiased;
}
a{color:var(--blue-dark);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:64px;gap:18px}
.brand{display:inline-flex;align-items:center;text-decoration:none}
.brand img{display:block;height:20px;width:auto}
.site-footer .brand img{height:22px}
.nav{display:flex;align-items:center;gap:4px}
.nav a{color:var(--ink-soft);font-weight:600;font-size:.93rem;padding:8px 12px;border-radius:8px;text-decoration:none}
.nav a:hover{background:var(--bg-soft);color:var(--blue-deep)}
.nav .cta{background:var(--blue);color:#fff}
.nav .cta:hover{background:var(--blue-deep);text-decoration:none}
@media(max-width:720px){.nav a:not(.cta){display:none}}

/* Blog index */
.page-head{padding:54px 0 8px}
.page-head h1{font-size:clamp(2rem,5vw,2.9rem);line-height:1.08;letter-spacing:-1px;margin:0 0 12px}
.page-head p{font-size:1.1rem;color:var(--muted);max-width:680px;margin:0}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:34px 0 70px}
@media(max-width:900px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.post-grid{grid-template-columns:1fr}}
.card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg);box-shadow:var(--shadow);padding:22px;transition:transform .15s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(9,9,11,.10)}
.tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.4px;text-transform:uppercase;
  color:var(--blue-deep);background:var(--bg-soft);padding:5px 10px;border-radius:999px;align-self:flex-start}
.card-thumb{display:block;margin:-22px -22px 16px;border-radius:var(--radius) var(--radius) 0 0;overflow:hidden;aspect-ratio:16/9;background:var(--bg-soft)}
.card-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.card h2{font-size:1.18rem;line-height:1.3;letter-spacing:-.3px;margin:14px 0 8px}
.card h2 a{color:var(--ink);text-decoration:none}
.card h2 a:hover{color:var(--blue-deep)}
.card p{color:var(--muted);font-size:.95rem;margin:0 0 16px}
.card .meta{margin-top:auto;font-size:.82rem;color:var(--muted-2)}

/* Article */
.article{padding:40px 0 24px}
.article .container{max-width:760px}
.crumbs{font-size:.85rem;color:var(--muted-2);margin-bottom:18px}
.crumbs a{color:var(--muted)}
.article h1{font-size:clamp(1.9rem,4.6vw,2.7rem);line-height:1.1;letter-spacing:-1px;margin:10px 0 14px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;color:var(--muted-2);font-size:.9rem;margin-bottom:8px}
.article-hero{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius);margin:18px 0 30px;background:var(--bg-soft);box-shadow:var(--shadow)}
.article-body{font-size:1.08rem}
.article-body h2{font-size:1.5rem;letter-spacing:-.4px;line-height:1.25;margin:38px 0 12px}
.article-body h3{font-size:1.2rem;margin:26px 0 10px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px}
.article-body li{margin:6px 0}
.article-body blockquote{margin:24px 0;padding:14px 20px;border-left:4px solid var(--blue);
  background:var(--bg-alt);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-soft);font-style:italic}
.article-body a{text-decoration:underline}
.post-cta{margin:46px 0 10px;padding:28px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(140deg,#eef8ff 0%,#f7fbff 100%);text-align:center}
.post-cta h3{margin:0 0 8px;font-size:1.25rem;letter-spacing:-.3px}
.post-cta p{margin:0 0 18px;color:var(--muted)}
.btn{display:inline-block;background:var(--blue);color:#fff;font-weight:700;padding:12px 24px;
  border-radius:10px;text-decoration:none}
.btn:hover{background:var(--blue-deep);text-decoration:none}
.back-link{display:inline-block;margin:30px 0 0;font-weight:600}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--bg-alt);padding:46px 0;margin-top:30px}
.site-footer .container{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between;align-items:flex-start}
.site-footer .brand{font-size:1.1rem}
.foot-links{display:flex;flex-wrap:wrap;gap:20px}
.foot-links a{color:var(--muted);font-size:.92rem;font-weight:600}
.foot-social{display:flex;gap:16px}
.foot-social a{color:var(--muted);font-size:.92rem;font-weight:600}
.copyright{width:100%;color:var(--muted-2);font-size:.82rem;border-top:1px solid var(--line);margin-top:14px;padding-top:18px}