/* Estilos del blog de Visibla — mismos tokens que index.html */
:root{
  --ink:#0c0e11;--ink-2:#2a2f36;--muted:#6b7480;--line:#e6e9ed;--paper:#ffffff;--mist:#f5f6f8;
  --steel:#7d93ab;--steel-soft:#c4d1de;--steel-deep:#3d5266;--r:22px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Geist',system-ui,sans-serif;background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.mono{font-family:'Geist Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.grain{position:relative}
.grain::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.progress{position:fixed;top:0;left:0;height:2px;width:100%;transform-origin:0 50%;transform:scaleX(0);background:var(--steel-deep);z-index:60}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:50;border-bottom:1px solid var(--line);background:rgba(255,255,255,.75);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:500;font-size:18px;letter-spacing:-.02em}
.logo i{width:22px;height:22px;border-radius:50%;border:1.5px solid currentColor;position:relative;display:block}
.logo i::after{content:"";position:absolute;inset:5px;border-radius:50%;background:currentColor}
.links{display:flex;gap:30px;font-size:14px;color:var(--ink-2)}
.links a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;background:var(--ink);color:#fff;font-size:14px;font-weight:500;border:0;cursor:pointer;transition:transform .2s,background .2s;font-family:inherit}
.btn:hover{transform:translateY(-1px);background:#000}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
nav .btn{height:38px;font-size:13px}
.ar{transition:transform .2s}.btn:hover .ar{transform:translateX(3px)}

/* CABECERA */
.art-head{overflow:hidden;background:linear-gradient(180deg,#e9edf1 0%,#dfe5eb 60%,#f5f6f8 100%);padding:150px 24px 80px}
.blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.85;animation:drift 18s ease-in-out infinite alternate}
.b1{width:520px;height:520px;background:var(--steel);left:-180px;top:10%}
.b2{width:440px;height:440px;background:#9fb4c9;right:-160px;top:-10%;animation-delay:-6s}
@keyframes drift{to{transform:translate(60px,-40px) scale(1.08)}}
.frost{position:absolute;inset:0;backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);background:rgba(255,255,255,.22)}
.art-head-in{position:relative;z-index:2;max-width:780px;margin:0 auto}
.crumbs{color:var(--steel-deep)}
.crumbs a:hover{color:var(--ink)}
.art-head h1{font-size:clamp(34px,5vw,58px);font-weight:400;letter-spacing:-.04em;line-height:1.04;margin-top:18px}
.lead{font-size:19px;line-height:1.55;color:var(--ink-2);margin-top:20px;max-width:640px}
.art-head .meta{margin-top:28px;color:var(--muted);font-size:10.5px}

/* ARTÍCULO */
.art{max-width:780px;margin:0 auto;padding:56px 24px 40px}
.toc{border:1px solid var(--line);border-radius:var(--r);padding:22px 26px;margin-bottom:44px;background:var(--mist)}
.toc .mono{color:var(--steel-deep);margin-bottom:10px}
.toc ol{padding-left:20px;font-size:15px;line-height:1.9;color:var(--ink-2)}
.toc a:hover{color:var(--ink);text-decoration:underline}
.prosa{font-size:18px;line-height:1.75;color:var(--ink-2)}
.prosa>*+*{margin-top:1.1em}
.prosa h2{font-size:30px;font-weight:500;letter-spacing:-.03em;line-height:1.15;color:var(--ink);margin-top:2.1em;scroll-margin-top:90px}
.prosa h3{font-size:21px;font-weight:500;letter-spacing:-.02em;color:var(--ink);margin-top:1.6em}
.prosa strong{color:var(--ink);font-weight:500}
.prosa a{color:var(--steel-deep);text-decoration:underline;text-underline-offset:3px}
.prosa ul,.prosa ol{padding-left:22px}
.prosa li+li{margin-top:.45em}
.prosa blockquote{border-left:2px solid var(--steel);padding:4px 0 4px 20px;color:var(--ink);font-size:19px}
.prosa table{width:100%;border-collapse:collapse;font-size:15px;display:block;overflow-x:auto}
.prosa th,.prosa td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.prosa th{font-weight:500;color:var(--ink);background:var(--mist)}
.prosa .nota{background:var(--mist);border:1px solid var(--line);border-radius:16px;padding:18px 22px;font-size:16px}

/* CTA dentro del artículo */
.cta-in{position:relative;overflow:hidden;border-radius:var(--r);padding:34px 32px;margin:2.4em 0;color:#fff;
  background:radial-gradient(circle at 20% 80%,var(--steel-deep),transparent 60%),radial-gradient(circle at 85% 20%,#8fa5bb,transparent 55%),#2b3846}
.cta-in .mono{color:rgba(255,255,255,.7)}
.cta-in h3{font-size:26px;font-weight:400;letter-spacing:-.03em;margin-top:10px;color:#fff}
.cta-in p{margin-top:8px;font-size:16px;line-height:1.55;color:rgba(255,255,255,.85);max-width:520px}
.cta-in .btn{margin-top:20px;background:#fff;color:var(--ink);text-decoration:none}

/* FAQ y fuentes */
.faq{margin-top:56px}
.faq h2{font-size:30px;font-weight:500;letter-spacing:-.03em;margin-bottom:18px}
.faq details{border-top:1px solid var(--line);padding:18px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-size:18px;font-weight:500;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";color:var(--steel-deep);font-weight:300;font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:10px;font-size:16.5px;line-height:1.65;color:var(--ink-2)}
.fuentes{margin-top:40px;font-size:14px;color:var(--muted)}
.fuentes .mono{margin-bottom:10px}
.fuentes ol{padding-left:20px;line-height:1.7}
.fuentes a{text-decoration:underline;text-underline-offset:3px}

/* TARJETAS */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.post{position:relative;display:flex;flex-direction:column;min-height:260px;padding:26px;border-radius:var(--r);background:var(--mist);border:1px solid var(--line);overflow:hidden;transition:transform .4s,box-shadow .4s,color .4s}
.post::before{content:"";position:absolute;inset:-20%;background:radial-gradient(circle at 30% 70%,var(--steel-deep),transparent 55%),radial-gradient(circle at 75% 30%,#9aaec2,transparent 50%),#59697a;filter:blur(30px);opacity:0;transition:opacity .5s}
.post>*{position:relative}
.post:hover{transform:translateY(-6px);box-shadow:0 30px 60px rgba(30,40,55,.18);color:#fff}
.post:hover::before{opacity:1}
.post:hover p,.post:hover .when{color:rgba(255,255,255,.85)}
.chip{align-self:flex-start;font-size:11px;padding:4px 9px;border-radius:7px;background:#fff;color:var(--steel-deep);border:1px solid var(--line);margin-bottom:18px}
.post h3{font-weight:500;font-size:20px;letter-spacing:-.02em;line-height:1.25}
.post p{margin-top:10px;font-size:14.5px;line-height:1.5;color:var(--muted)}
.post .when{margin-top:auto;padding-top:22px;color:#97a0aa;font-size:10.5px}
.rel{padding:30px 24px 90px}
.rel>.mono{color:var(--steel-deep);margin-bottom:18px}
.listado{padding-top:40px;padding-bottom:100px}
.tabs{display:flex;gap:4px;padding:5px;border:1px solid var(--line);border-radius:14px;margin-bottom:28px;flex-wrap:wrap;width:max-content;max-width:100%}
.tab{padding:9px 16px;border-radius:10px;font-size:14px;color:var(--ink-2);background:none;border:0;cursor:pointer;font-family:inherit;transition:.2s}
.tab.on{background:var(--ink);color:#fff}

footer{padding:40px 0 50px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer a{text-decoration:underline;text-underline-offset:3px}

@media (max-width:900px){.links{display:none}.grid{grid-template-columns:1fr 1fr}}
@media (max-width:600px){
  .wrap{padding:0 20px}
  .grid{grid-template-columns:1fr}
  .art-head{padding:120px 20px 56px}
  .art{padding:40px 20px 30px}
  .prosa{font-size:17px}
  .prosa h2,.faq h2{font-size:25px}
  .cta-in{padding:28px 22px}
  .tabs{width:auto;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .tab{white-space:nowrap}
  nav .btn{padding:0 14px}
}
@media (max-width:380px){nav .btn{font-size:12px;height:34px;padding:0 12px}.lead{font-size:17px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}