:root{--bg:#f6f8fb;--card:#fff;--soft:#eef2f8;--ink:#14213d;--ink-2:#34425e;--muted:#5f6b80;--line:#dde3ec;--line-strong:#14213d;
--accent:#2f6fed;--accent-ink:#2456c9;--link:#2456c9;--head:'IBM Plex Sans',system-ui,sans-serif;--body:'IBM Plex Sans',system-ui,sans-serif;--mono:'IBM Plex Mono',ui-monospace,monospace;--head-w:600;
--radius:12px;--radius-btn:8px;--btn-bg:#14213d;--btn-ink:#fff;--foot-bg:#0e1830;--code-bg:#0e1830}
.brand{font-family:var(--mono);font-weight:500;font-size:1.08rem}
.hero{padding:clamp(56px,8vw,104px) 0 clamp(40px,6vw,72px)}
.hero .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);letter-spacing:-.025em}
.hero h1 span{color:var(--accent)}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}}
.term{background:#0e1830;color:#dbe4f5;border-radius:14px;padding:22px 24px;font-family:var(--mono);font-size:.9rem;line-height:1.7;box-shadow:0 20px 50px -24px rgba(20,33,61,.45)}
.term .dots{display:flex;gap:6px;margin-bottom:14px}.term .dots i{width:10px;height:10px;border-radius:50%;background:#2a3a5c;display:block}
.term .c{color:#7f93b8}.term .k{color:#7fb0ff}.term .y{color:#ffd479}
.term .cur{display:inline-block;width:8px;height:1.1em;background:#2f6fed;vertical-align:-.15em;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.feature{display:grid;grid-template-columns:1.1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;text-decoration:none;color:inherit}
.feature .img{background:#fff;border-right:1px solid var(--line);display:grid;place-items:center;padding:18px}
.feature .txt{padding:clamp(22px,3vw,36px);display:flex;flex-direction:column;gap:.6rem}
.feature .cat{font-size:.82rem;font-weight:600;color:var(--accent-ink)}
.feature h2{font-size:clamp(1.5rem,2.6vw,2rem);margin:0}
.feature:hover{border-color:var(--accent)}
@media (max-width:820px){.feature{grid-template-columns:1fr}.feature .img{border-right:0;border-bottom:1px solid var(--line)}}
.cta-box{background:var(--ink);color:#dbe4f5;border-radius:var(--radius);padding:clamp(26px,4vw,44px);display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:center}
.cta-box h2{color:#fff;margin-bottom:.3em}
.cta-box p{margin:0;max-width:40em}
.cta-box .btn{background:#2f6fed;border-color:#2f6fed}
.author{display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.author img{width:48px;height:48px;flex:none}
/* base común: cada sitio define sus variables en :root */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.65;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--link);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3,h4{font-family:var(--head);line-height:1.15;margin:0 0 .6em;color:var(--ink);font-weight:var(--head-w,650);letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5.2vw,3.6rem)}
h2{font-size:clamp(1.55rem,3.2vw,2.25rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.25em 0}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:.6em 1em;z-index:99}
.skip:focus{left:10px;top:10px}
.muted{color:var(--muted)}
.eyebrow{font-family:var(--body);font-size:.9rem;font-weight:600;color:var(--accent-ink,var(--accent));margin:0 0 .9em;letter-spacing:.01em}
.lead{font-size:clamp(1.1rem,1.7vw,1.3rem);color:var(--ink-2,var(--ink));max-width:42em}
section{padding:clamp(56px,8vw,104px) 0}
.sec-head{max-width:46em;margin-bottom:2.4rem}

/* encabezado */
.site-header{position:sticky;top:0;z-index:20;background:var(--header-bg,var(--bg));border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:.65rem;text-decoration:none;color:var(--header-ink,var(--ink));font-family:var(--brand-font,var(--head));font-weight:650;font-size:1.12rem;letter-spacing:-.01em}
.brand img{width:36px;height:36px}
.brand small{display:block;font-family:var(--body);font-weight:400;font-size:.78rem;color:var(--header-muted,var(--muted));letter-spacing:0}
.nav{display:flex;align-items:center;gap:1.4rem}
.nav a{color:var(--header-ink,var(--ink));text-decoration:none;font-size:.95rem}
.nav a:hover{text-decoration:underline}
.nav .btn{padding:.55em 1em;font-size:.92rem}
.menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--header-ink,var(--ink));border-radius:8px;padding:.45em .7em;font:inherit;font-size:.9rem;cursor:pointer}
@media (max-width:860px){
 .menu-toggle{display:block}
 .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:flex-start;gap:0;background:var(--header-bg,var(--bg));border-bottom:1px solid var(--line);padding:8px 20px 18px}
 .nav.open{display:flex}
 .nav a{padding:.65em 0;width:100%;border-bottom:1px solid var(--line)}
 .nav .btn{margin-top:12px;width:auto;border-bottom:0}
}

/* botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.85em 1.4em;border-radius:var(--radius-btn,6px);background:var(--btn-bg,var(--ink));color:var(--btn-ink,var(--bg))!important;text-decoration:none!important;font-weight:600;font-family:var(--body);border:1px solid var(--btn-bg,var(--ink));cursor:pointer;font-size:1rem;line-height:1.2;transition:transform .15s ease,background .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--btn-ghost-ink,var(--ink))!important;border-color:var(--btn-ghost-line,var(--line-strong,var(--ink)))}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.6rem}

/* grillas */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:980px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card,#fff);border:1px solid var(--line);border-radius:var(--radius,10px);padding:26px}
.card h3{margin-bottom:.45em}
.card p:last-child{margin-bottom:0}

/* tabla */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius,10px);background:var(--card,#fff)}
table{width:100%;border-collapse:collapse;font-size:.98rem}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--body);font-weight:600;font-size:.88rem;color:var(--muted);background:var(--soft)}
tr:last-child td{border-bottom:0}

/* preguntas frecuentes */
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-weight:600;font-family:var(--head);font-size:1.12rem;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--body);font-weight:400;color:var(--accent);font-size:1.4rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:.8em 0 0;color:var(--ink-2,var(--ink))}

/* pie */
.site-footer{background:var(--foot-bg,var(--ink));color:var(--foot-ink,#d9dde4);padding:56px 0 34px;font-size:.95rem}
.site-footer a{color:inherit}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.site-footer h4{color:var(--foot-head,#fff);font-family:var(--body);font-size:.95rem;font-weight:600;margin-bottom:.8em}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer .legal{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);font-size:.85rem;opacity:.8}
.site-footer .brand{color:var(--foot-head,#fff)}
.site-footer .brand small{color:inherit;opacity:.7}
@media (max-width:760px){.site-footer .cols{grid-template-columns:1fr}}

/* artículos de blog */
.post-hero{padding:clamp(48px,7vw,88px) 0 28px}
.post-meta{display:flex;flex-wrap:wrap;gap:.4em 1.2em;color:var(--muted);font-size:.92rem;margin-top:1rem}
.crumbs{font-size:.9rem;color:var(--muted);margin-bottom:1.2rem}
.crumbs a{color:var(--muted)}
.prose{font-size:1.09rem;line-height:1.75;padding-bottom:72px}
.prose h2{margin-top:2em;font-size:clamp(1.4rem,2.6vw,1.85rem)}
.prose h3{margin-top:1.6em}
.prose blockquote{margin:1.6em 0;padding:.4em 0 .4em 1.3em;border-left:3px solid var(--accent);font-family:var(--quote,var(--head));font-size:1.15rem;color:var(--ink-2,var(--ink))}
.prose blockquote cite{display:block;font-size:.9rem;font-style:normal;color:var(--muted);margin-top:.5em;font-family:var(--body)}
.prose figure{margin:2em 0}
.prose figure img{width:100%;border:1px solid var(--line);border-radius:var(--radius,10px);background:#fff}
.prose figcaption{font-size:.9rem;color:var(--muted);margin-top:.6em}
.prose pre{background:var(--code-bg,#11161f);color:var(--code-ink,#e8ecf3);padding:18px 20px;border-radius:var(--radius,10px);overflow-x:auto;font-size:.88rem;line-height:1.6;margin:1.4em 0}
.prose code{font-family:var(--mono,ui-monospace,SFMono-Regular,Menlo,Consolas,monospace);font-size:.92em}
.prose :not(pre)>code{background:var(--soft);padding:.1em .35em;border-radius:4px}
.prose .note{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--radius,10px);padding:18px 22px;margin:1.6em 0;font-size:1rem}
.prose .note p:last-child{margin-bottom:0}
.prose .compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:1.6em 0}
.prose .compare>div{border:1px solid var(--line);border-radius:var(--radius,10px);padding:18px 20px;background:var(--card,#fff);min-width:0}
.prose .compare h3{margin-top:0;font-size:1.05rem}
@media (max-width:720px){.prose .compare{grid-template-columns:1fr}}
.prose .transcript{font-family:var(--mono,ui-monospace,monospace);font-size:.95rem;background:var(--card,#fff);border:1px solid var(--line);border-radius:var(--radius,10px);padding:18px 22px;margin:1.6em 0;line-height:1.6}
.prose .transcript p{margin:.35em 0}
.prose .transcript b{color:var(--accent);display:inline-block;min-width:1.8em}
.prose table{margin:1.4em 0;display:block;overflow-x:auto}
.post-foot{border-top:1px solid var(--line);padding:32px 0 80px}

/* tarjetas de entradas */
.post-card{display:flex;flex-direction:column;gap:.5rem;text-decoration:none;color:inherit;background:var(--card,#fff);border:1px solid var(--line);border-radius:var(--radius,10px);padding:24px;transition:border-color .15s ease,transform .15s ease}
.post-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.post-card .cat{font-size:.82rem;font-weight:600;color:var(--accent-ink,var(--accent))}
.post-card h3{margin:0;font-size:1.18rem}
.post-card p{margin:0;color:var(--ink-2,var(--muted));font-size:.97rem}
.post-card .meta{margin-top:auto;padding-top:.6rem;font-size:.85rem;color:var(--muted)}