:root{
  --bg:#070b14; --ink:#eef3f7; --muted:#93a1b0; --muted-2:#6b7a8a;
  --glass:rgba(255,255,255,.045); --glass-2:rgba(255,255,255,.07);
  --hair:rgba(255,255,255,.09); --hair-strong:rgba(255,255,255,.16);
  --cyan:#46d6e6; --green:#33d98a;
  --display:'Bricolage Grotesque',sans-serif; --body:'Hanken Grotesk',sans-serif;
  --r:16px; --pill:999px; --shadow:0 12px 30px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
body{margin:0;background:
  radial-gradient(120% 80% at 80% -10%,rgba(70,214,230,.10),transparent 55%),
  radial-gradient(120% 90% at 100% 100%,rgba(51,217,138,.08),transparent 55%),var(--bg);
  color:var(--ink);font-family:var(--body);line-height:1.65;font-size:17px}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
.shell{width:min(820px,92vw);margin:40px auto 70px}
.topbar{width:min(1100px,94vw);margin:18px auto 0;display:flex;align-items:center;gap:16px;
  background:var(--glass);border:1px solid var(--hair);border-radius:var(--pill);padding:10px 20px}
.brand{font-family:var(--display);font-weight:800;color:var(--ink);font-size:18px;display:flex;gap:9px;align-items:center;white-space:nowrap}
.brand .logo{color:var(--cyan)}
.nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.nav a{color:var(--muted);padding:8px 12px;border-radius:var(--pill);font-size:14px;font-weight:500}
.nav a:hover{color:var(--ink);background:var(--glass-2);text-decoration:none}
.nav .btn,.btn{background:linear-gradient(135deg,#36e29a,#22b877);color:#04150d!important;font-weight:700;border-radius:var(--pill);padding:10px 16px}
.eyebrow{color:var(--cyan);font-weight:600;font-size:13px;letter-spacing:.05em;text-transform:uppercase}
h1{font-family:var(--display);font-weight:800;letter-spacing:-.03em;line-height:1.05;font-size:clamp(30px,5vw,46px);margin:.3em 0}
h2{font-family:var(--display);font-weight:700;letter-spacing:-.02em;margin-top:1.8em;font-size:1.55rem}
h3{font-family:var(--display);font-weight:600;margin-top:1.4em;font-size:1.2rem}
.hero{padding:30px 0 10px;border-bottom:1px solid var(--hair);margin-bottom:24px}
.hero p{color:var(--muted);font-size:1.15rem;max-width:60ch}
.postlist{display:grid;gap:16px}
.post-card{display:block;background:var(--glass);border:1px solid var(--hair);border-radius:var(--r);padding:22px;transition:.2s}
.post-card:hover{border-color:rgba(70,214,230,.4);background:var(--glass-2);text-decoration:none;transform:translateY(-2px)}
.post-card h2{margin:.3em 0;font-size:1.35rem;color:var(--ink)}
.post-card p{color:var(--muted);margin:.3em 0}
.tag,.meta{font-size:12.5px;color:var(--cyan);text-transform:uppercase;letter-spacing:.04em}
.meta{color:var(--muted-2)}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:8px}
.byline{color:var(--muted);font-size:14px;margin:6px 0 22px}
.tldr{background:linear-gradient(180deg,rgba(70,214,230,.08),transparent);border:1px solid rgba(70,214,230,.3);
  border-left:3px solid var(--cyan);border-radius:12px;padding:16px 18px;margin:22px 0;font-size:1.05rem}
.toc{background:var(--glass);border:1px solid var(--hair);border-radius:12px;padding:6px 18px;margin:22px 0}
.toc summary{cursor:pointer;font-family:var(--display);font-weight:600;padding:8px 0}
.toc ul{list-style:none;padding-left:0;margin:6px 0 12px}
.toc li.d3{padding-left:18px;font-size:.92em}
.toc a{color:var(--muted)}
.prose p{margin:1em 0}
.prose img{max-width:100%;height:auto;border-radius:12px}
.prose table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.95rem}
.prose th,.prose td{border:1px solid var(--hair);padding:9px 12px;text-align:left}
.prose th{background:var(--glass);font-family:var(--display)}
.prose blockquote{border-left:3px solid var(--green);margin:1.2em 0;padding:4px 18px;color:var(--muted)}
.prose code{background:var(--glass-2);padding:2px 6px;border-radius:6px;font-size:.9em}
.prose pre{background:#0a1120;border:1px solid var(--hair);border-radius:12px;padding:16px;overflow:auto}
/* FAQ glow-accordion (mismo patrón AEO-safe del sitio) */
.faqs{margin-top:2.5em}
details.faq-item{border:1px solid var(--hair);border-radius:12px;background:var(--glass);margin:8px 0;padding:0 18px;transition:.25s}
details.faq-item>summary{list-style:none;cursor:pointer;position:relative;padding:15px 42px 15px 0;font-weight:600;font-family:var(--display)}
details.faq-item>summary::-webkit-details-marker{display:none}
details.faq-item>summary::after{content:"+";position:absolute;right:2px;top:50%;transform:translateY(-50%);width:26px;height:26px;display:grid;place-items:center;color:var(--cyan);border:1px solid var(--hair);border-radius:50%;transition:.3s}
details.faq-item[open]{border-color:rgba(70,214,230,.42);box-shadow:0 0 0 1px rgba(70,214,230,.14),var(--shadow);background:linear-gradient(180deg,rgba(70,214,230,.06),transparent 60%)}
details.faq-item[open]>summary::after{transform:translateY(-50%) rotate(45deg);color:var(--green);border-color:rgba(51,217,138,.5)}
.optin{margin:2.5em 0;background:linear-gradient(135deg,rgba(70,214,230,.08),rgba(51,217,138,.06));border:1px solid var(--hair-strong);border-radius:var(--r);padding:22px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.author-box{margin-top:2em;border-top:1px solid var(--hair);padding-top:18px;color:var(--muted);font-size:.95rem}
.foot{width:min(1100px,94vw);margin:40px auto;color:var(--muted-2);font-size:13px;border-top:1px solid var(--hair);padding-top:18px;text-align:center}
@media(max-width:760px){.nav{display:none}}
/* Catálogo por cluster */
.clusters{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 30px}
.cluster-chip{display:flex;flex-direction:column;gap:2px;background:var(--glass);border:1px solid var(--hair);border-radius:var(--pill);padding:10px 18px;transition:.2s}
.cluster-chip:hover{border-color:rgba(70,214,230,.4);background:var(--glass-2);text-decoration:none;transform:translateY(-1px)}
.cluster-chip b{font-family:var(--display);font-size:14px;color:var(--ink)}
.cluster-chip span{font-size:11.5px;color:var(--cyan)}
.cluster-section{margin:36px 0}
.cluster-head{border-bottom:1px solid var(--hair);margin-bottom:16px;padding-bottom:8px}
.cluster-head h2{margin:0;font-size:1.5rem}
.cluster-head p{margin:4px 0 0;color:var(--muted);font-size:.95rem}
.post-card h3{margin:.3em 0;font-size:1.2rem;color:var(--ink);font-family:var(--display)}
.related{margin-top:2.5em;border-top:1px solid var(--hair);padding-top:18px}
.related h2{margin-top:0}

/* Hero del artículo + thumbnails en tarjetas (s375) */
.post-hero{width:100%;height:auto;border-radius:14px;border:1px solid var(--hair);margin:18px 0 8px;display:block}
.post-card{display:flex;gap:18px;align-items:flex-start}
.card-thumb{flex:0 0 220px;width:220px;aspect-ratio:16/9;object-fit:cover;border-radius:10px;border:1px solid var(--hair)}
.card-body{flex:1;min-width:0}
@media(max-width:640px){.post-card{flex-direction:column}.card-thumb{flex:0 0 auto;width:100%}}

/* Logo real en topbar (unificación nav s375) */
.brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--ink)}
.brand img{height:26px;width:auto;display:inline-block}
.nav a.active{color:var(--ink);background:var(--glass-2)}