:root{--bg:#0f1115;--card:#171a21;--ink:#e8eaed;--muted:#9aa0aa;--brand:#4f8cff;--line:#262a33}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}
.wrap{max-width:980px;margin:0 auto;padding:0 20px}
.site-header{border-bottom:1px solid var(--line);background:#11131a;position:sticky;top:0;z-index:10}
.topbar{display:flex;align-items:center;height:60px}
.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}
.catnav{border-top:1px solid var(--line);overflow-x:auto}
.catnav .wrap{display:flex;gap:18px;white-space:nowrap;padding-top:10px;padding-bottom:10px}
.catnav a{color:var(--muted);text-decoration:none;font-size:14px;font-weight:600}
.catnav a:hover{color:var(--ink)}
.hero{padding:40px 0 18px}
.hero h1{font-size:32px;margin:0 0 8px}
.hero p{color:var(--muted);font-size:18px;margin:0}
.catblock{margin:30px 0}
.cathead{display:flex;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:16px}
.cathead h2{font-size:22px;margin:0}
.seeall{color:var(--brand);text-decoration:none;font-size:14px;font-weight:600}
.grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;padding:6px 0 18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column}
.card h2{font-size:16px;margin:8px 0 6px;line-height:1.3}
.card h2 a{color:var(--ink);text-decoration:none}
.card p{color:var(--muted);font-size:13px;margin:0 0 12px;flex:1}
.tag{display:inline-block;width:fit-content;font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--brand);background:rgba(79,140,255,.12);padding:3px 9px;border-radius:999px;text-decoration:none}
.more{color:var(--brand);text-decoration:none;font-size:14px;font-weight:600}
.post{padding:30px 0 50px;max-width:760px}
.post h1{font-size:30px;line-height:1.25;margin:6px 0 8px}
.post h2{font-size:22px;margin:28px 0 10px}
.post p{margin:14px 0}
.post ul{margin:14px 0;padding-left:22px}
.post li{margin:6px 0}
.crumb,.meta{color:var(--muted);font-size:13px;margin:0}
.meta-review{margin-top:4px;margin-bottom:18px;font-style:italic}
.crumb a{color:var(--muted)}
a{color:var(--brand)}
.ad-placeholder{border:1px dashed #3a3f4b;color:#6b7280;text-align:center;padding:22px;border-radius:10px;margin:24px 0;font-size:13px;background:#13161d}
.site-footer{border-top:1px solid var(--line);margin-top:30px;padding:26px 0;color:var(--muted);font-size:14px}
.site-footer a{color:var(--muted)}
@media(max-width:820px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.grid{grid-template-columns:1fr}.hero h1{font-size:26px}}

/* --- Cabecera visual y anuncios laterales (v3) --- */
.wrap-wide{max-width:1200px;margin:0 auto;padding:0 20px}
.article-layout{display:grid;grid-template-columns:160px minmax(0,720px) 160px;justify-content:center;gap:24px;align-items:start;padding-top:18px}
.article-layout .post{max-width:none;padding-top:0}
.rail{width:160px}
.rail-sticky{position:sticky;top:84px}
.ad-rail-ph{width:160px;height:600px;border:1px dashed #3a3f4b;border-radius:10px;background:#13161d;color:#6b7280;font-size:12px;display:flex;align-items:center;justify-content:center;writing-mode:vertical-rl;letter-spacing:2px}
.hero-img{width:100%;height:auto;display:block;border-radius:14px;margin:0 0 20px}
@media(max-width:1100px){.article-layout{grid-template-columns:1fr;max-width:760px;margin:0 auto}.rail{display:none}}

/* --- Articulos relacionados (SEO interno) --- */
.related{margin:36px 0 0;border-top:1px solid var(--line);padding-top:18px}
.related h2{font-size:18px;margin:0 0 12px}
.related ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.related a{color:var(--ink);text-decoration:none;font-weight:600}
.related a:hover{color:var(--brand)}