/* El blog con el lenguaje de la landing v5 (15-10-2026) — plantilla en scripts/blog-v5.mjs.
   Los valores son los de src/v4.css y src/v5.css (papel, tinta, lima, la tarjeta de vidrio, Anton);
   sin parallax: la vida es la entrada de las tarjetas. Hoja propia, sin el CSS de la SPA. */

@font-face{font-family:"Anton";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/Anton-latin.woff2) format("woff2")}
@font-face{font-family:"Space Grotesk";font-style:normal;font-weight:300 700;font-display:swap;src:url(/fonts/SpaceGrotesk.woff2) format("woff2")}

:root{
  --papel:#f4f7f6; --tinta:#0b0b0a; --tinta2:#111110; --neon:#c6ff33;
  --gris:#43433e; --gris2:#6b6b64; --gris3:#8a8a84;
  --ancho:1140px; --lectura:680px;
  --gutter:max(clamp(20px,4.2vw,72px),calc((100% - var(--ancho)) / 2));
  --cond:"Anton","Impact","Arial Narrow",sans-serif;
  --sombra:0 1px 0 rgba(255,255,255,.8) inset,0 30px 60px -24px rgba(17,24,39,.28),0 8px 18px -10px rgba(17,24,39,.12);
}
*{box-sizing:border-box}
html{scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body.b5{margin:0;background:var(--papel);color:var(--tinta);font-family:"Space Grotesk",Inter,system-ui,sans-serif;
  font-synthesis:none;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.b5 a{color:inherit;text-decoration:none}
:where(.b5) :where(h1,h2,h3,p,figure){margin:0}
.b5 img{display:block;max-width:100%}
.b5-oculto{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.b5-ancho{width:100%;max-width:var(--ancho);margin:0 auto}

/* ── iPhone/iPad o no: sin JS, por CSS (sólo el WebKit de iOS tiene -webkit-touch-callout) ── */
.b5-ios{display:none!important}
@supports (-webkit-touch-callout:none){.b5-ios{display:inline-flex!important}.b5-web{display:none!important}}

/* ── piezas de la v5 ── */
.b5-tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--gris2)}
.b5-h1,.b5-h2{display:flex;flex-direction:column;font-family:var(--cond);font-weight:400;text-transform:uppercase;line-height:.9;color:var(--tinta)}
.b5-h1{margin-top:14px;font-size:clamp(56px,7.4vw,104px)}
.b5-h2{font-size:clamp(40px,4.4vw,66px)}
.b5-h2.b5-claro{color:#fff}
.b5-h3{font-size:clamp(24px,2.4vw,30px);font-weight:700;letter-spacing:-.025em;line-height:1.12}
.b5-sub{margin-top:18px;max-width:46ch;font-size:clamp(15.5px,1.45vw,18px);line-height:1.6;font-weight:500;color:rgba(11,11,10,.74)}
.b5-card{background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4);
  border:1px solid rgba(255,255,255,.9);border-radius:28px;color:var(--tinta2);box-shadow:var(--sombra)}
.b5 .b5-pill{display:inline-flex;align-items:center;gap:16px;min-height:56px;padding:6px 6px 6px 26px;border-radius:999px;
  background:var(--neon);color:var(--tinta);font-size:17px;font-weight:800;border:2px solid var(--tinta);
  box-shadow:0 14px 30px -14px rgba(11,11,10,.5);transition:transform .15s}
.b5 .b5-pill:hover{transform:translateY(-2px)}
.b5 .b5-pill:active{transform:scale(.98)}
.b5-pill span{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--tinta);color:var(--neon)}

/* ── menú: de vidrio y fijo (aquí no hay escena detrás que dejar ver) ── */
.b5-nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:20px;padding:12px var(--gutter);
  background:rgba(244,247,246,.8);-webkit-backdrop-filter:blur(16px) saturate(1.4);backdrop-filter:blur(16px) saturate(1.4);
  box-shadow:0 1px 0 rgba(17,24,39,.06),0 10px 30px -18px rgba(17,24,39,.35)}
.b5-logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:.05em}
.b5-marca{width:36px;height:36px;flex:none;filter:drop-shadow(0 6px 12px rgba(11,11,10,.28))}
.b5-nav-l{display:flex;gap:28px;margin-left:auto;font-size:14px;font-weight:600;color:var(--gris)}
.b5-nav-l a:hover,.b5-nav-l a[aria-current]{color:var(--tinta)}
.b5 .b5-nav-cta{display:inline-flex;align-items:center;min-height:44px;padding:0 20px;border-radius:999px;
  background:var(--tinta);color:#fff;font-size:14px;font-weight:800;margin-left:8px}
@media(max-width:900px){.b5-nav-l{display:none}.b5 .b5-nav-cta{margin-left:auto}}
@media(max-width:560px){.b5-logo{font-size:16px;gap:8px}.b5-marca{width:30px;height:30px}.b5 .b5-nav-cta{min-height:40px;padding:0 16px;font-size:13.5px}}

/* ── el menú de hamburguesa del móvil, dinámico (20-10-2026, Daniel: «convirtámoslo a dinámico con efecto moderno»):
   el icono pasa de ≡ a ×, el fondo se difumina, la hoja baja con un leve rebote y los enlaces entran escalonados ── */
.b5-burger{display:none;align-items:center;justify-content:center;width:44px;height:44px;margin-left:10px;padding:0;border:0;border-radius:999px;
  background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:0 1px 0 rgba(17,24,39,.05),0 8px 18px -10px rgba(17,24,39,.35);
  color:#111110;cursor:pointer;transition:background .3s,color .3s,transform .2s}
.b5-burger:active{transform:scale(.92)}
.b5-burger.on{background:#111110;color:#fff}
.b5-burger-ico{position:relative;display:block;width:18px;height:14px}
.b5-burger-ico i{position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:currentColor;
  transition:top .42s cubic-bezier(.65,0,.25,1),transform .42s cubic-bezier(.65,0,.25,1),opacity .2s}
.b5-burger-ico i:nth-child(1){top:0} .b5-burger-ico i:nth-child(2){top:6px} .b5-burger-ico i:nth-child(3){top:12px}
.b5-burger.on .b5-burger-ico i:nth-child(1){top:6px;transform:rotate(45deg)}
.b5-burger.on .b5-burger-ico i:nth-child(2){opacity:0;transform:scaleX(.2)}
.b5-burger.on .b5-burger-ico i:nth-child(3){top:6px;transform:rotate(-45deg)}
.b5-menu{position:fixed;inset:0;z-index:19;visibility:hidden;pointer-events:none;opacity:0;background:rgba(244,247,246,.55);
  -webkit-backdrop-filter:blur(0);backdrop-filter:blur(0);transition:opacity .35s ease,-webkit-backdrop-filter .35s,backdrop-filter .35s,visibility 0s linear .45s}
.b5-menu.on{visibility:visible;pointer-events:auto;opacity:1;-webkit-backdrop-filter:blur(14px) saturate(1.2);backdrop-filter:blur(14px) saturate(1.2);
  transition:opacity .3s ease,-webkit-backdrop-filter .35s,backdrop-filter .35s,visibility 0s}
.b5-menu-hoja{position:absolute;left:12px;right:12px;top:var(--b5-menu-top,76px);max-height:calc(100dvh - var(--b5-menu-top,76px) - 16px);overflow:auto;
  padding:10px 10px 12px;border-radius:28px;background:#fff;box-shadow:0 40px 80px -30px rgba(17,24,39,.45),0 0 0 1px rgba(17,24,39,.06);
  transform-origin:top right;transform:translateY(-14px) scale(.96);opacity:0;transition:transform .45s cubic-bezier(.2,.9,.25,1.15),opacity .3s ease}
.b5-menu.on .b5-menu-hoja{transform:none;opacity:1}
.b5-menu-link{display:flex;align-items:center;gap:14px;min-height:60px;padding:0 10px;border-radius:18px;font-size:22px;font-weight:800;letter-spacing:-.01em;
  color:#111110;text-decoration:none;opacity:0;transform:translateY(10px);transition:opacity .3s ease,transform .45s cubic-bezier(.2,.9,.25,1),background .2s}
.b5-menu.on .b5-menu-link{opacity:1;transform:none;transition-delay:calc(70ms + var(--i) * 45ms),calc(70ms + var(--i) * 45ms),0s}
.b5-menu-t{flex:1}
.b5-menu-ico{display:grid;place-items:center;flex:none;width:38px;height:38px;border-radius:12px;background:#f1f2f0;color:#111110;transition:background .25s,color .25s}
.b5-menu-ico svg{display:block}
.b5-menu-link:hover .b5-menu-ico,.b5-menu-link:active .b5-menu-ico{background:#111110;color:#fff}
.b5-menu-link small{font-size:12.5px;font-weight:700;letter-spacing:0;color:#6b6b64}
.b5-menu-link > svg{flex:none;color:#8a8a84;transition:transform .25s,color .25s}
.b5-menu-link:hover,.b5-menu-link:active{background:#f1f2f0}
.b5-menu-link:hover > svg{transform:translate(2px,-2px);color:#111110}
.b5-menu-cta{display:flex;align-items:center;justify-content:center;gap:8px;min-height:54px;margin:10px 4px 2px;border-radius:999px;background:#c6ff33;
  color:#0b0b0a;font-size:16px;font-weight:800;text-decoration:none;opacity:0;transform:translateY(10px);transition:opacity .3s ease,transform .45s cubic-bezier(.2,.9,.25,1)}
.b5-menu.on .b5-menu-cta{opacity:1;transform:none;transition-delay:340ms}
html.b5-menu-abierto{overflow:hidden}
@media(max-width:900px){.b5-burger{display:inline-flex}}
@media(prefers-reduced-motion:reduce){.b5-menu,.b5-menu-hoja,.b5-menu-link,.b5-menu-cta,.b5-burger-ico i{transition:none!important}}
.b5-menu-cta{width:calc(100% - 8px)}
/* 20-10-2026 · entrar por la web: «Log in» en la barra (escritorio) y en el menú del móvil, bajo el botón principal */
.b5 .b5-nav-login{display:inline-flex;align-items:center;min-height:44px;padding:0 6px;font-size:14.5px;font-weight:700;color:var(--tinta);
  text-decoration:underline;text-decoration-color:rgba(11,11,10,.25);text-underline-offset:4px}
.b5 .b5-nav-login:hover{text-decoration-color:var(--tinta)}
@media(min-width:901px){.b5 .b5-nav-login{margin-left:4px}}
@media(max-width:900px){.b5 .b5-nav-login{display:none}}
.b5 .b5-menu-login{display:flex;align-items:center;justify-content:center;gap:8px;width:calc(100% - 8px);min-height:48px;margin:8px 4px 2px;
  border-radius:999px;border:1.5px solid rgba(11,11,10,.16);font-size:15px;font-weight:700;color:var(--tinta);
  opacity:0;transform:translateY(8px);transition:opacity .3s,transform .3s cubic-bezier(.2,.9,.25,1.15)}
.b5-menu.on .b5-menu-login{opacity:1;transform:none;transition-delay:380ms}
/* ── el índice: la biblioteca a sangre, con el velo de la sección de blog de la portada ── */
.b5-cab-hub{position:relative;overflow:hidden;padding:clamp(56px,8vw,112px) var(--gutter) clamp(120px,14vw,190px);background:#e8eef3}
.b5-cab-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:70% 8%;
  animation:b5-asienta 1.6s cubic-bezier(.2,.8,.2,1) both}
.b5-cab-hub::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(244,247,246,.82) 0%,rgba(244,247,246,.45) 50%,var(--papel) 86%)}
.b5-cab-hub .b5-ancho{position:relative;z-index:1}
.b5-hub{position:relative;z-index:2;display:flex;flex-direction:column;gap:24px;margin-top:clamp(-120px,-10vw,-84px);padding:0 var(--gutter) clamp(64px,8vw,104px);max-width:none}
.b5-hub>*{width:100%;max-width:var(--ancho);margin-left:auto;margin-right:auto}

/* ── tarjeta de artículo (la .v5-post de la portada) ── */
.b5 .b5-post{display:flex;flex-direction:column;overflow:hidden;border-radius:24px;transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.b5 .b5-post:hover{transform:translateY(-3px)}
.b5-post-img{position:relative;display:block;aspect-ratio:4/3;overflow:hidden;background:#dfe8ef}
.b5-post-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.b5 .b5-post:hover .b5-post-img img{transform:scale(1.04)}
.b5-post-img em{position:absolute;left:12px;top:12px;padding:5px 11px;border-radius:999px;background:rgba(255,255,255,.9);
  font-style:normal;font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--tinta2)}
.b5-post-cuerpo{display:flex;flex-direction:column;gap:8px;padding:18px 20px 20px;flex:1}
.b5-post-cuerpo b{font-size:18px;line-height:1.25;letter-spacing:-.015em;color:var(--tinta2)}
.b5-post-cuerpo small{font-size:14px;line-height:1.5;color:var(--gris2);flex:1}
.b5-post-a{display:inline-flex;align-items:center;gap:6px;margin-top:4px;font-size:13.5px;font-weight:700;color:var(--tinta2)}
.b5 .b5-post-grande{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);border-radius:28px}
.b5-post-grande .b5-post-img{aspect-ratio:auto;min-height:340px}
.b5-post-grande .b5-post-cuerpo{justify-content:center;gap:12px;padding:clamp(24px,3.4vw,44px)}
.b5-post-grande .b5-post-cuerpo b{font-size:clamp(24px,2.6vw,34px);line-height:1.12;letter-spacing:-.025em}
.b5-post-grande .b5-post-cuerpo small{flex:none;font-size:16px}
@media(max-width:760px){.b5 .b5-post-grande{display:flex}.b5-post-grande .b5-post-img{aspect-ratio:4/3;min-height:0}}
.b5-rejilla{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media(max-width:1000px){.b5-rejilla{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.b5-rejilla{grid-template-columns:1fr}}
.b5-vacio{padding:40px;text-align:center;color:var(--gris2)}

/* ── el índice que se adapta (fase 1 del rediseño del blog, 20-10-2026): destacado, «Start here», temas que filtran,
   buscador, y una sección por tema — rejilla de 3 en escritorio (6 y «See all»), carril que se desliza en el móvil ── */
.b5-hub2{gap:clamp(28px,3.4vw,44px)}
.b5-nuevo{position:absolute;right:12px;top:12px;padding:5px 10px;border-radius:999px;background:var(--neon);color:var(--tinta);
  font-style:normal;font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.b5-arranque{display:flex;flex-direction:column;gap:12px}
.b5-arranque ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none}
.b5 .b5-paso{display:flex;align-items:center;gap:14px;height:100%;padding:16px 18px;border-radius:22px;transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.b5 .b5-paso:hover{transform:translateY(-2px)}
.b5-paso i{display:grid;place-items:center;flex:none;width:42px;height:42px;border-radius:50%;background:var(--tinta);color:var(--neon);
  font-family:var(--cond);font-style:normal;font-size:22px}
.b5-paso span{display:flex;flex-direction:column;gap:4px;flex:1;min-width:0}
.b5-paso b{font-size:15.5px;line-height:1.25;letter-spacing:-.01em;color:var(--tinta2)}
.b5-paso small{font-size:12.5px;color:var(--gris2)}
.b5-paso>svg{flex:none;color:var(--gris3)}
@media(max-width:900px){.b5-arranque ol{grid-template-columns:1fr;gap:8px}}

.b5-filtros{position:sticky;top:var(--b5-nav-alto,64px);z-index:6;display:flex;align-items:center;gap:12px;margin-top:-8px;padding:10px 0}
/* el fondo de la barra, de borde a borde (la barra mide el ancho del contenido; el fondo, el de la pantalla) */
.b5-filtros::before{content:"";position:absolute;z-index:-1;top:0;bottom:-10px;left:calc(50% - 50vw);right:calc(50% - 50vw);
  background:linear-gradient(180deg,var(--papel) 80%,rgba(244,247,246,0));pointer-events:none}
.b5-chips{display:flex;gap:6px;flex:1;min-width:0;overflow-x:auto;scrollbar-width:none;padding:2px 0}
.b5-chips::-webkit-scrollbar{display:none}
.b5 .b5-chip{flex:none;display:inline-flex;align-items:center;gap:6px;min-height:42px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid rgba(11,11,10,.1);font-size:14px;font-weight:700;color:var(--tinta2);white-space:nowrap;
  transition:background .2s,color .2s,border-color .2s,transform .2s}
.b5 .b5-chip:hover{border-color:rgba(11,11,10,.3)}
.b5-chip span{font-size:12px;font-weight:700;color:var(--gris3);transition:color .2s}
.b5 .b5-chip.on{background:var(--tinta);border-color:var(--tinta);color:#fff}
.b5-chip.on span{color:var(--neon)}
.b5-busca{flex:none;display:flex;align-items:center;gap:8px;width:220px;min-height:42px;padding:0 8px 0 14px;border-radius:999px;
  background:#fff;border:1px solid rgba(11,11,10,.1);color:var(--gris2);transition:border-color .2s,box-shadow .2s}
.b5-busca:focus-within{border-color:var(--tinta);box-shadow:0 0 0 3px rgba(198,255,51,.55)}
.b5-busca input{flex:1;min-width:0;border:0;outline:0;background:transparent;font:inherit;font-size:16px;color:var(--tinta)}
.b5-busca input::-webkit-search-cancel-button{display:none}
.b5-busca-x{display:grid;place-items:center;width:30px;height:30px;border:0;border-radius:50%;background:#eef0ee;color:var(--tinta2);cursor:pointer}
.b5-busca-x[hidden]{display:none}
/* hasta tablet los temas no caben: se deslizan y el borde derecho se difumina para que se note que hay más */
@media(max-width:1000px){.b5-chips{-webkit-mask-image:linear-gradient(90deg,#000 86%,transparent);mask-image:linear-gradient(90deg,#000 86%,transparent)}}
/* el móvil: una sola fila fija; el buscador es la lupa al final y, al tocarla (o con texto), se abre sobre los temas */
@media(max-width:760px){
  .b5-filtros{gap:8px}
  .b5-busca{width:42px;padding:0;justify-content:center;transition:width .25s}
  .b5-busca input{flex:0 0 0;width:0;opacity:0}
  .b5-busca:focus-within,.b5-busca.lleno{position:absolute;left:0;right:0;top:10px;width:auto;padding:0 8px 0 14px;justify-content:flex-start;z-index:1}
  .b5-busca:focus-within input,.b5-busca.lleno input{flex:1;width:auto;opacity:1}
}

.b5-tema{display:flex;flex-direction:column;gap:14px;scroll-margin-top:calc(var(--b5-nav-alto,64px) + 70px)}
.b5-tema[hidden],.b5-post[hidden],.b5-sin[hidden]{display:none!important}
.b5-tema-cab{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.b5-tema .b5-h2{font-size:clamp(30px,3.6vw,46px)}
.b5-tema-n{font-size:13px;font-weight:700;color:var(--gris2);white-space:nowrap}
.b5-carril{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.b5-carril>.b5-post:nth-child(n+7){display:none}
.b5-tema.abierto .b5-carril>.b5-post,.b5-hub2.filtrando .b5-carril>.b5-post{display:flex}
.b5 .b5-ver-todo{align-self:center;display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 20px;border-radius:999px;
  background:#fff;border:1px solid rgba(11,11,10,.14);font:inherit;font-size:14px;font-weight:700;color:var(--tinta2);cursor:pointer}
.b5 .b5-ver-todo:hover{border-color:var(--tinta)}
.b5-tema.abierto .b5-ver-todo svg{transform:rotate(-90deg)}
.b5-hub2.filtrando .b5-ver-todo,.b5-hub2.filtrando .b5-destacado,.b5-hub2.filtrando .b5-arranque{display:none}
@media(max-width:1000px) and (min-width:761px){.b5-carril{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* el móvil: cada tema es un carril que se desliza con el dedo; al filtrar, una columna */
@media(max-width:760px){
  .b5-carril{grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:min(82%,330px);overflow-x:auto;
    scroll-snap-type:x mandatory;scroll-padding-inline:var(--gutter);margin:0 calc(-1 * var(--gutter));padding:4px var(--gutter) 14px;scrollbar-width:none}
  .b5-carril::-webkit-scrollbar{display:none}
  .b5-carril>.b5-post{scroll-snap-align:start}
  .b5-carril>.b5-post:nth-child(n+7){display:flex}
  .b5-ver-todo{display:none!important}
  .b5-hub2.filtrando .b5-carril{grid-auto-flow:row;grid-template-columns:1fr;grid-auto-columns:auto;overflow:visible;margin:0;padding:0}
}
.b5-sin{padding:28px;text-align:center;color:var(--gris2);font-size:15px}
.b5-sin a{color:var(--tinta2);font-weight:700;text-decoration:underline}

/* ── boletín ── */
.b5-boletin{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);align-items:center;gap:24px;padding:clamp(24px,3vw,36px)}
.b5-boletin .b5-tag{margin-bottom:8px}
.b5-boletin p{margin-top:6px;font-size:15px;line-height:1.55;color:var(--gris2)}
.b5-boletin-form{display:flex;gap:8px}
.b5-boletin-form input{flex:1;min-width:0;min-height:52px;padding:0 20px;border-radius:999px;border:1px solid rgba(17,24,39,.14);
  background:#fff;font:inherit;font-size:16px;color:var(--tinta)}
.b5-boletin-form input:focus{outline:2px solid var(--tinta);outline-offset:2px}
.b5-boletin-form button{min-height:52px;padding:0 22px;border:0;border-radius:999px;background:var(--tinta);color:#fff;
  font:inherit;font-size:15px;font-weight:800;cursor:pointer;transition:transform .15s}
.b5-boletin-form button:active{transform:scale(.98)}
.b5-boletin-form button:disabled{opacity:.5}
.b5-boletin .b5-boletin-error{grid-column:1/-1;margin-top:-8px;color:#b23a2e}
.b5-boletin .b5-boletin-ok{grid-column:1/-1;font-size:17px;font-weight:700;color:var(--tinta)}
@media(max-width:760px){.b5-boletin{grid-template-columns:1fr}}
@media(max-width:420px){.b5-boletin-form{flex-direction:column}}

/* ── el artículo ── */
.b5-articulo{padding:clamp(28px,4vw,56px) var(--gutter) 0}
.b5-cab-post{max-width:860px}
.b5-volver{display:inline-flex;align-items:center;gap:6px;min-height:44px;margin-bottom:12px;font-size:14px;font-weight:700;color:var(--gris)}
.b5-volver:hover{color:var(--tinta)}
.b5-cab-post .b5-tag{display:block}
.b5-titulo{margin-top:14px;max-width:22ch;font-size:clamp(34px,4.8vw,60px);font-weight:700;line-height:1.04;letter-spacing:-.035em;color:var(--tinta)}
.b5-entradilla{margin-top:18px;max-width:56ch;font-size:clamp(17px,1.6vw,20px);line-height:1.55;font-weight:500;color:rgba(11,11,10,.7)}
.b5-autor{display:inline-flex;align-items:center;gap:12px;margin-top:24px}
.b5-autor img{width:40px;height:40px;border-radius:50%;object-fit:cover;box-shadow:0 6px 14px -6px rgba(11,11,10,.35)}
.b5-autor span{display:flex;flex-direction:column;line-height:1.3}
.b5-autor b{font-size:14.5px}
.b5-autor small{font-size:13px;color:var(--gris2)}
.b5-portada{max-width:860px;margin-top:clamp(28px,3.4vw,44px)}
.b5-portada img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:28px;box-shadow:var(--sombra);
  animation:b5-asienta 1.6s cubic-bezier(.2,.8,.2,1) both}

/* El texto: una columna de lectura, alineada con el título */
.b5-cuerpo{max-width:860px;margin:clamp(36px,4.4vw,56px) auto 0;padding-right:calc(860px - var(--lectura))}
@media(max-width:900px){.b5-cuerpo{padding-right:0;max-width:var(--lectura);margin-left:0}}
.b5-cuerpo{font-size:18px;line-height:1.72;color:#22221f}
.b5-cuerpo>*+*{margin-top:1.1em}
.b5-cuerpo h2{margin-top:2.2em;font-size:clamp(25px,2.4vw,30px);font-weight:700;line-height:1.18;letter-spacing:-.025em;color:var(--tinta)}
.b5-cuerpo h3{margin-top:1.8em;font-size:21px;font-weight:700;line-height:1.25;letter-spacing:-.015em;color:var(--tinta)}
.b5-cuerpo h2+*,.b5-cuerpo h3+*{margin-top:.6em}
.b5-cuerpo strong{font-weight:700;color:var(--tinta)}
.b5-cuerpo a{text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:3px;text-decoration-color:rgba(11,11,10,.35)}
.b5-cuerpo a:hover{text-decoration-color:var(--tinta)}
.b5-cuerpo ul,.b5-cuerpo ol{padding-left:1.3em}
.b5-cuerpo li+li{margin-top:.5em}
.b5-cuerpo li::marker{color:var(--gris3);font-weight:700}
.b5-cuerpo blockquote{margin:1.6em 0;padding:20px 24px;border-radius:20px;background:#fff;box-shadow:var(--sombra);
  font-size:18px;font-weight:500;color:var(--tinta2)}
.b5-cuerpo blockquote p{margin:0}
.b5-cuerpo table{width:100%;border-collapse:separate;border-spacing:0;font-size:15.5px;line-height:1.45;background:#fff;
  border-radius:20px;overflow:hidden;box-shadow:var(--sombra)}
.b5-cuerpo th,.b5-cuerpo td{padding:12px 16px;text-align:left;vertical-align:top}
.b5-cuerpo th{font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--gris2);background:#f1f2f0}
.b5-cuerpo tr+tr td{border-top:1px solid rgba(17,24,39,.07)}
.b5-cuerpo code{padding:3px 9px;border-radius:9px;background:#fff;box-shadow:0 1px 0 rgba(17,24,39,.06),0 6px 14px -8px rgba(17,24,39,.25);
  font-family:inherit;font-size:.94em;font-weight:700;letter-spacing:.01em;color:var(--tinta);white-space:nowrap}
.b5-cuerpo hr{border:0;height:1px;background:rgba(17,24,39,.12);margin:2.4em 0}
@media(max-width:560px){.b5-cuerpo{font-size:17px}.b5-cuerpo table{display:block;overflow-x:auto;white-space:nowrap}
  /* 18-10-2026: las tablas con frases (line scores, plazos) se parten en líneas en vez de medir 1.400 px de ancho */
  .b5-cuerpo table{white-space:normal;font-size:14.5px}.b5-cuerpo th,.b5-cuerpo td{min-width:4em;padding:10px 10px;vertical-align:top}.b5-cuerpo th{font-size:11px;letter-spacing:.04em}.b5-cuerpo td{-webkit-hyphens:auto;hyphens:auto}}

/* ── el artículo, fase 2 (20-10-2026): progreso, índice, me gusta y compartir, la llamada del medio, el final ── */
.b5-progreso{position:fixed;top:0;left:0;right:0;z-index:30;height:3px;pointer-events:none}
.b5-progreso i{display:block;height:100%;background:var(--neon);box-shadow:0 0 0 .5px rgba(11,11,10,.25);transform:scaleX(0);transform-origin:0 50%}
.b5-cab-fila{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px 20px;margin-top:24px}
.b5-cab-fila .b5-autor{margin-top:0}
.b5-acciones{display:flex;gap:8px}
.b5 .b5-megusta,.b5 .b5-compartir{display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid rgba(11,11,10,.12);font:inherit;font-size:14px;font-weight:700;color:var(--tinta2);cursor:pointer;
  transition:border-color .2s,background .2s,color .2s}
.b5 .b5-megusta:hover,.b5 .b5-compartir:hover{border-color:var(--tinta)}
.b5-megusta b{min-width:1ch;padding-left:7px;border-left:1px solid rgba(11,11,10,.14);font-weight:800;color:var(--gris2)}
.b5-megusta b[hidden]{display:none}
.b5 .b5-megusta.on{border-color:#e5484d;color:#c62a2f}
.b5-megusta.on svg{fill:#e5484d;stroke:#e5484d}
.b5-megusta.late svg{animation:b5-late .45s cubic-bezier(.2,.8,.2,1.4)}
@keyframes b5-late{0%{transform:scale(1)}40%{transform:scale(1.35)}100%{transform:scale(1)}}
.b5-copiado{position:fixed;left:50%;bottom:24px;z-index:40;transform:translateX(-50%);padding:10px 18px;border-radius:999px;
  background:var(--tinta);color:#fff;font-size:14px;font-weight:700;box-shadow:var(--sombra)}
.b5-copiado[hidden]{display:none}

/* el índice: tarjeta plegable antes del texto; desde 1180 px, columna fija a la derecha del texto */
.b5-cuerpo-marco{max-width:860px;margin:clamp(36px,4.4vw,56px) auto 0}
.b5-cuerpo-marco .b5-cuerpo{margin-top:0}
.b5-indice{max-width:var(--lectura);margin-bottom:28px}
.b5-indice details{border-radius:20px;background:#fff;border:1px solid rgba(11,11,10,.08);box-shadow:0 10px 24px -18px rgba(17,24,39,.35)}
.b5-indice summary{display:flex;align-items:center;gap:10px;min-height:52px;padding:0 18px;cursor:pointer;list-style:none;font-size:15px;font-weight:700;color:var(--tinta2)}
.b5-indice summary::-webkit-details-marker{display:none}
.b5-indice summary small{margin-left:auto;font-size:12.5px;font-weight:600;color:var(--gris2)}
.b5-indice summary::after{content:"";width:8px;height:8px;margin-left:4px;border-right:2px solid var(--gris2);border-bottom:2px solid var(--gris2);transform:rotate(45deg) translateY(-2px);transition:transform .2s}
.b5-indice details[open] summary::after{transform:rotate(-135deg) translateY(-2px)}
.b5-indice ol{margin:0;padding:0 10px 12px;list-style:none;counter-reset:ind}
.b5-indice li{counter-increment:ind}
.b5-indice a{display:flex;gap:10px;padding:8px 10px;border-radius:12px;font-size:14.5px;line-height:1.35;color:var(--gris);transition:background .2s,color .2s}
.b5-indice a::before{content:counter(ind);flex:none;width:1.4em;font-weight:800;color:var(--gris3)}
.b5 .b5-indice a:hover{background:#f1f2f0;color:var(--tinta)}
.b5 .b5-indice a.on{background:var(--tinta);color:#fff}
.b5-indice a.on::before{color:var(--neon)}
@media(max-width:900px){.b5-cuerpo-marco{max-width:var(--lectura);margin-left:0}}
@media(min-width:1180px){
  .b5-cuerpo-marco{display:grid;grid-template-columns:var(--lectura) 248px;column-gap:36px;align-items:start}
  .b5-cuerpo-marco .b5-cuerpo{grid-column:1;grid-row:1;max-width:none;padding-right:0;margin:0}
  .b5-indice{grid-column:2;grid-row:1;position:sticky;top:calc(var(--b5-nav-alto,64px) + 24px);margin:0;max-height:calc(100vh - 120px);overflow:auto}
  .b5-indice details{background:transparent;border:0;box-shadow:none}
  .b5-indice summary{min-height:40px;padding:0 10px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--gris2);pointer-events:none}
  .b5-indice summary svg,.b5-indice summary small,.b5-indice summary::after{display:none}
  .b5-indice ol{padding:0}
  .b5-indice a{font-size:13.5px;padding:7px 10px}
}
.b5-cuerpo h2[id]{scroll-margin-top:calc(var(--b5-nav-alto,64px) + 20px)}

/* la llamada del medio: la única tarjeta oscura del texto, con el botón lima */
.b5-cuerpo .b5-llamada{display:flex;flex-direction:column;gap:8px;margin:2.2em 0;padding:24px 24px 22px;border-radius:24px;background:var(--tinta);color:#fff}
.b5-llamada .b5-tag{color:var(--neon)}
.b5-llamada b{font-size:22px;line-height:1.2;letter-spacing:-.02em;color:#fff}
.b5-llamada small{font-size:15px;line-height:1.5;color:rgba(255,255,255,.72)}
.b5-cuerpo .b5-llamada a{align-self:flex-start;margin-top:10px;text-decoration:none}
.b5 .b5-pill-peq{min-height:50px;gap:12px;padding:5px 5px 5px 20px;font-size:15.5px}
.b5-pill-peq span{width:40px;height:40px}

/* el final: «¿te sirvió?» con el corazón y compartir */
.b5-fin{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;max-width:var(--lectura);margin:48px auto 0;
  padding:20px 0;border-top:1px solid rgba(17,24,39,.12);border-bottom:1px solid rgba(17,24,39,.12)}
@media(min-width:901px){.b5-fin{max-width:860px;padding-right:calc(860px - var(--lectura))}}
@media(max-width:900px){.b5-fin{margin-left:0}}
.b5-fin>b{font-size:17px;color:var(--tinta)}
/* fase 3 (20-10-2026): la miga del artículo («The blog / Math») y la página de un tema */
.b5-miga{display:flex;align-items:center;flex-wrap:wrap;gap:4px 10px;margin-bottom:12px}
.b5-miga .b5-volver{margin-bottom:0}
.b5-miga span{color:var(--gris3)}
.b5-miga>a:not(.b5-volver){display:inline-flex;align-items:center;min-height:44px;font-size:14px;font-weight:700;color:var(--tinta2);
  text-decoration:underline;text-decoration-color:rgba(11,11,10,.25);text-underline-offset:4px}
.b5-cab-tema .b5-h1{font-size:clamp(46px,7vw,96px)}
.b5-cab-tema .b5-sub{max-width:52ch}
.b5-chips-tema{flex-wrap:wrap;overflow:visible;padding:0}
@media(max-width:760px){.b5-chips-tema{flex-wrap:nowrap;overflow-x:auto;margin:0 calc(-1 * var(--gutter));padding:2px var(--gutter)}}
.b5-mas-sub{margin-top:-12px;font-size:14.5px;color:var(--gris2)}
.b5-mas-sub a{font-weight:700;color:var(--tinta2);text-decoration:underline;text-underline-offset:3px}

.b5-mas{display:flex;flex-direction:column;gap:24px;padding:clamp(72px,8vw,110px) var(--gutter) 0;max-width:none}
.b5-mas>*{width:100%;max-width:var(--ancho);margin-left:auto;margin-right:auto}
.b5-mas-boletin{padding:24px var(--gutter) clamp(64px,8vw,104px);max-width:none}
.b5-mas-boletin>*{max-width:var(--ancho);margin:0 auto}

/* la tarjeta del post hacia su tema de /learn */
.b5-learn-caja{max-width:860px;padding:0 var(--gutter);margin:40px auto 0}
.b5-cuerpo+.b5-learn-caja,.b5-articulo+.b5-learn-caja{margin-top:40px}
.b5 .b5-learn{display:flex;flex-direction:column;gap:8px;max-width:var(--lectura);padding:24px 26px;border-radius:24px;border:2px solid var(--tinta);transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.b5 .b5-learn:hover{transform:translateY(-3px)}
.b5-learn b{font-size:21px;line-height:1.2;letter-spacing:-.02em;color:var(--tinta)}
.b5-learn small{font-size:15px;line-height:1.5;color:var(--gris2)}
/* ── el cierre: Pitágoras cruza el arco (la última sección de la portada) ── */
.b5-cierre{position:relative;overflow:hidden;display:flex;align-items:flex-start;min-height:min(100svh,880px);
  padding:clamp(90px,10vw,140px) var(--gutter) clamp(280px,32vw,420px);background:#2a2620;text-align:center}
.b5-cierre-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:80% 0%}
@media(orientation:portrait){.b5-cierre-img{object-position:50% 55%}}
.b5-cierre::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(11,11,10,.62) 0%,rgba(11,11,10,.42) 38%,rgba(11,11,10,0) 66%)}
.b5-cierre-g{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center}
.b5-cierre .b5-h2{align-items:center;font-size:clamp(40px,5vw,78px);text-shadow:0 2px 24px rgba(0,0,0,.25)}
.b5-cierre-p{margin-top:16px;font-size:clamp(16px,1.6vw,20px);font-weight:600;color:#fff;text-shadow:0 1px 10px rgba(0,0,0,.45)}
.b5-cierre-cta{display:flex;flex-direction:column;align-items:center;gap:10px;margin-top:28px}
.b5 .b5-alt{display:inline-flex;align-items:center;gap:6px;min-height:44px;font-size:14px;font-weight:700;color:#fff;
  border-bottom:2px solid rgba(255,255,255,.5);text-shadow:0 1px 10px rgba(0,0,0,.5)}
.b5-cierre-cta small{font-size:13px;font-weight:600;color:#fff;text-shadow:0 1px 10px rgba(0,0,0,.6)}

/* ── pie ── */
.b5-pie{padding:24px var(--gutter) 28px;background:var(--tinta);color:rgba(255,255,255,.72);font-size:12.5px}
.b5-pie-fila{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.b5-pie-fila nav{display:flex;gap:16px;margin-left:auto;font-weight:600}
.b5-pie-fila nav a:hover{color:#fff}
.b5-logo-pie{font-size:14px;color:#fff}
.b5-logo-pie .b5-marca{width:28px;height:28px}
.b5-pie p{margin-top:12px;max-width:110ch;font-size:11.5px;line-height:1.6;color:rgba(255,255,255,.6)}
@media(max-width:560px){.b5-pie-fila nav{margin-left:0;flex-wrap:wrap;gap:12px}}

/* ── movimiento: las tarjetas suben y aparecen; la escena llega acercada y se asienta ── */
.b5-entra{animation:b5-sube .42s cubic-bezier(.2,.8,.2,1) both;animation-delay:calc(var(--i,0) * 60ms + 120ms)}
@keyframes b5-sube{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes b5-asienta{from{transform:scale(1.06)}to{transform:none}}
/* 20-10: la biblioteca nueva (Pitágoras a la derecha) ya no se pinta en espejo; la vieja sí, y su animación lo llevaba */
@media(prefers-reduced-motion:reduce){.b5 *,.b5 *::before,.b5 *::after{animation:none!important;transition:none!important}}

/* ── las legales y Support (16-10-2026): la cabecera del artículo y, debajo del título, una fila de píldoras para
   pasar de una a otra; la elegida en tinta ── */
.b5-legal{padding-bottom:clamp(56px,7vw,96px)}
.b5-legal-nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.b5-legal-nav a{display:inline-flex;align-items:center;min-height:40px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.82);box-shadow:inset 0 0 0 1px rgba(11,11,10,.08);font-size:14px;font-weight:700;color:var(--gris);
  transition:background .2s,color .2s}
.b5-legal-nav a:hover{color:var(--tinta)}
.b5-legal-nav a[aria-current="page"]{background:var(--tinta);box-shadow:none;color:#fff}
.b5-legal .b5-cuerpo h2{scroll-margin-top:90px}

/* ── About (16-10-2026, segunda vuelta): la escena de la portada de fondo con el titular; la tarjeta de vidrio con
   la foto se monta sobre su borde; luego el porqué, los tres pasos, las cifras, «off the clock» y lo demás que hace ── */
.b5-sobre-cab{position:relative;overflow:hidden;isolation:isolate;padding:clamp(56px,8vw,112px) var(--gutter) clamp(150px,16vw,220px)}
.b5-sobre-fondo{position:absolute;inset:0;z-index:-2;width:100%;height:100%;object-fit:cover;object-position:72% 40%;
  animation:b5-asienta 1.6s cubic-bezier(.2,.8,.2,1) both}
.b5-sobre-cab::after{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(244,247,246,.92) 0%,rgba(244,247,246,.6) 46%,rgba(244,247,246,0) 75%),
             linear-gradient(180deg,rgba(244,247,246,0) 55%,var(--papel) 100%)}
@media(max-width:700px){.b5-sobre-cab::after{background:linear-gradient(180deg,rgba(244,247,246,.78) 0%,rgba(244,247,246,.35) 45%,rgba(244,247,246,.2) 70%,var(--papel) 100%)}}
.b5-sobre-cab .b5-h1{max-width:11ch}
.b5-sobre-cab .b5-sub{max-width:34ch;margin-top:18px;font-size:clamp(17px,1.7vw,21px);line-height:1.5;font-weight:500;color:rgba(11,11,10,.75)}
.b5-sobre{position:relative;z-index:2;margin-top:clamp(-120px,-11vw,-90px);padding:0 var(--gutter) clamp(64px,8vw,104px);max-width:none}
.b5-sobre > *{max-width:var(--ancho);margin-left:auto;margin-right:auto}
/* la tarjeta: foto grande y quién es */
.b5-sobre-tarjeta{display:grid;grid-template-columns:minmax(0,220px) 1fr;gap:clamp(20px,3vw,40px);align-items:center;padding:clamp(20px,3vw,36px)}
.b5-sobre-foto{width:100%;height:auto;aspect-ratio:1;object-fit:cover;border-radius:24px;box-shadow:0 18px 36px -18px rgba(11,11,10,.5)}
.b5-sobre-nombre{margin-top:8px;font-size:clamp(30px,3.6vw,44px);font-weight:700;letter-spacing:-.04em;line-height:1.04}
.b5-sobre-yo p{margin-top:14px;max-width:52ch;font-size:clamp(16.5px,1.5vw,18.5px);line-height:1.6;color:#22221f}
.b5-sobre-firma{display:block;width:min(300px,80%);height:auto;margin-top:20px;opacity:.92}
.b5-sobre-enlaces{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.b5-sobre-enlaces a{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 18px;border-radius:999px;
  background:rgba(11,11,10,.06);font-size:15px;font-weight:700;color:var(--tinta);transition:background .2s}
.b5-sobre-enlaces a:first-child{background:var(--tinta);color:#fff}
.b5-sobre-enlaces a:hover{background:rgba(11,11,10,.12)}
.b5-sobre-enlaces a:first-child:hover{background:#2a2a28}
@media(max-width:640px){.b5-sobre-tarjeta{grid-template-columns:1fr}.b5-sobre-foto{width:132px;border-radius:28px}}
/* las secciones */
.b5-sobre-sec{margin-top:clamp(56px,7vw,88px)}
.b5-sobre-sec .b5-h2{font-size:clamp(38px,4.6vw,60px)}
.b5-sobre-texto{max-width:var(--lectura);margin-top:18px;font-size:18px;line-height:1.7;color:#22221f}
.b5-sobre-texto p+p{margin-top:1em}
.b5-sobre-tres{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:clamp(32px,4vw,48px)}
@media(max-width:860px){.b5-sobre-tres{grid-template-columns:1fr}}
.b5-sobre-paso{padding:24px 24px 26px}
.b5-sobre-n{font-family:var(--cond);font-size:34px;line-height:1;color:rgba(11,11,10,.22)}
.b5-sobre-paso h3{margin-top:14px;font-size:21px;font-weight:700;letter-spacing:-.025em}
.b5-sobre-paso p{margin-top:8px;font-size:16px;line-height:1.55;color:var(--gris)}
.b5-sobre-cifras{display:grid;grid-template-columns:repeat(3,1fr);margin-top:16px;border-radius:24px;background:var(--tinta);color:#fff;overflow:hidden}
.b5-sobre-cifras div{display:flex;flex-direction:column;gap:6px;padding:22px 24px}
.b5-sobre-cifras div+div{border-left:1px solid rgba(255,255,255,.12)}
.b5-sobre-cifras b{font-family:var(--cond);font-weight:400;font-size:clamp(26px,3vw,38px);line-height:1;text-transform:uppercase}
.b5-sobre-cifras span{font-size:14px;color:rgba(255,255,255,.65)}
@media(max-width:640px){.b5-sobre-cifras{grid-template-columns:1fr}.b5-sobre-cifras div{padding:18px 22px}.b5-sobre-cifras div+div{border-left:0;border-top:1px solid rgba(255,255,255,.12)}}
.b5-sobre-dos{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:start}
@media(max-width:860px){.b5-sobre-dos{grid-template-columns:1fr}}
.b5-sobre-otro{display:flex;flex-direction:column;gap:6px;margin-top:16px;padding:20px 22px;color:var(--tinta);transition:transform .2s}
.b5-sobre-otro:hover{transform:translateY(-2px)}
.b5-sobre-otro b{display:inline-flex;align-items:center;gap:6px;font-size:19px;font-weight:700;letter-spacing:-.02em}
.b5-sobre-otro span{font-size:15.5px;line-height:1.55;color:var(--gris)}

/* ── la calculadora del AFQT (16-10-2026): la cabecera con la balanza de la portada a la derecha; el formulario en la
   tarjeta de vidrio, tres campos con su código en una píldora, el botón en tinta (el lima es del cierre); al calcular,
   el número en Anton y la cuenta con sus números debajo ── */
.b5-calc-cab{position:relative;overflow:hidden;padding:clamp(36px,6vw,88px) var(--gutter) clamp(28px,4vw,48px)}
.b5-calc-cab .b5-ancho{position:relative;z-index:1}
.b5-calc-cab .b5-titulo,.b5-calc-cab .b5-entradilla{max-width:min(22ch,60%)}
.b5-calc-cab .b5-entradilla{max-width:min(48ch,60%)}
.b5-calc-obj{position:absolute;z-index:0;right:max(var(--gutter),calc((100% - var(--ancho)) / 2));top:50%;width:min(400px,34vw);height:auto;
  transform:translateY(-50%);filter:drop-shadow(0 30px 40px rgba(17,24,39,.22));animation:b5-flota 7s ease-in-out infinite}
@keyframes b5-flota{0%,100%{transform:translateY(-50%)}50%{transform:translateY(calc(-50% - 10px))}}
@media(max-width:760px){
  .b5-calc-cab{padding-top:28px}
  .b5-calc-obj{position:relative;right:auto;top:auto;display:block;width:min(220px,56vw);margin:0 auto 4px;transform:none;animation:none}
  .b5-calc-cab .b5-titulo,.b5-calc-cab .b5-entradilla{max-width:none}
}
.b5-calc{display:flex;flex-direction:column;gap:16px;padding:0 var(--gutter) clamp(64px,8vw,104px);max-width:none}
.b5-calc>*{width:100%;max-width:var(--ancho);margin-left:auto;margin-right:auto}
.b5 .b5-calc>.b5-cuerpo{max-width:var(--ancho);margin-top:clamp(24px,3vw,40px);padding-right:max(0px,calc(100% - var(--lectura)))}
.b5-calc-form{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:clamp(18px,2.6vw,28px)}
.b5-calc-campo{display:flex;flex-direction:column;gap:10px;padding:16px;border-radius:20px;background:#fff;box-shadow:inset 0 0 0 1px rgba(11,11,10,.07)}
.b5-calc-campo span{display:flex;flex-direction:column;gap:8px;font-size:14px;line-height:1.35;font-weight:600;color:var(--gris)}
.b5-calc-campo span b{align-self:flex-start;padding:4px 10px;border-radius:999px;background:var(--tinta);color:#fff;font-size:12px;font-weight:800;letter-spacing:.12em}
.b5-calc-campo input{width:100%;min-height:56px;margin-top:auto;padding:0 16px;border:1px solid rgba(17,24,39,.14);border-radius:16px;background:var(--papel);
  font:inherit;font-size:24px;font-weight:700;color:var(--tinta);-moz-appearance:textfield}
.b5-calc-campo input::-webkit-outer-spin-button,.b5-calc-campo input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.b5-calc-campo input::placeholder{color:#b9b9b2;font-weight:500;font-size:18px}
.b5-calc-campo input:focus{outline:2px solid var(--tinta);outline-offset:2px;background:#fff}
.b5-calc-btn{grid-column:1/-1;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:56px;border:0;border-radius:999px;
  background:var(--tinta);color:#fff;font:inherit;font-size:16px;font-weight:800;cursor:pointer;transition:transform .15s}
.b5-calc-btn:hover{transform:translateY(-1px)}
.b5-calc-btn:active{transform:scale(.99)}
.b5-calc-res{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:22px 16px 18px;border-radius:20px;background:var(--tinta);color:#fff;text-align:center;
  animation:b5-sube .42s cubic-bezier(.2,.8,.2,1) both}
.b5-calc-res[hidden]{display:none}
.b5-calc-res span{font-size:14px;font-weight:600;color:rgba(255,255,255,.72)}
.b5-calc-res b{font-family:var(--cond);font-weight:400;font-size:clamp(64px,9vw,96px);line-height:1;color:var(--neon)}
.b5-calc-res small{font-size:15px;font-weight:700;letter-spacing:.02em;color:rgba(255,255,255,.85)}
@media(max-width:700px){.b5-calc-form{grid-template-columns:1fr}.b5-calc-campo{flex-direction:row;align-items:center;gap:12px}
  .b5-calc-campo span{flex:1}.b5-calc-campo input{width:112px;flex:none;margin-top:0;text-align:center}}
.b5-calc-nota{padding:clamp(20px,2.6vw,28px)}
.b5-calc-nota p{max-width:72ch;margin-top:10px;font-size:16px;line-height:1.65;color:var(--gris)}
.b5-calc-tablas h2:first-child{margin-top:0}
.b5 .b5-calc-mas{display:inline-flex;align-items:center;gap:6px;text-decoration:none;font-weight:700}

/* ── la baja del boletín (16-10-2026): la cabecera de las legales y el estado en una tarjeta ── */
.b5-baja{min-height:52vh}
.b5-baja-card{max-width:860px;margin-top:clamp(24px,3vw,36px);padding:clamp(22px,3vw,32px)}
.b5-baja-card p{max-width:56ch;font-size:18px;line-height:1.6;font-weight:600;color:var(--tinta2)}
/* dos columnas cortas: caben a 375 px, sin el desplazamiento lateral de las tablas de los artículos */
@media(max-width:560px){.b5 .b5-calc-tablas table{display:table;white-space:normal}}

/* ── las rutas React (/simulacro y /start, Marco5.jsx) cargan además src/portada-base.css, cuyas reglas sueltas de
   elemento (`h1`, `footer`) ganan a las de aquí que van con :where(); se deshacen para que se vean igual que el blog ── */
.b5 .b5-h1,.b5 .b5-h2{letter-spacing:normal;margin-bottom:0}
.b5 .b5-pie{display:block;max-width:none;margin:0;border-top:0}
/* el percentil (16-10-2026): número en Anton, la categoría en una píldora lima, y la fila de su categoría marcada */
.b5-calc-res em{display:inline-flex;align-items:center;gap:8px;margin:4px 0 6px;font-style:normal;font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.7)}
.b5-calc-res em strong{padding:4px 12px;border-radius:999px;background:var(--neon);color:var(--tinta);letter-spacing:.06em}
.b5-calc-res small strong{color:#fff}
.b5 .b5-calc-fuente{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:14.5px;font-weight:700;color:var(--tinta);
  border-bottom:2px solid rgba(11,11,10,.25)}
.b5-calc-tablas tr.b5-calc-tuya td{background:var(--tinta);color:#fff}
.b5-calc-tablas tr.b5-calc-tuya td strong{color:var(--neon)}
.b5-calc-res .b5-calc-cuenta{font-weight:600;color:rgba(255,255,255,.6)}

/* ── Bloques del panel (Content · Blog, 18-10-2026): reel, calculadora, Instagram, foto ── */
.b5-cuerpo .md-reel{margin:32px auto;display:grid;gap:10px;justify-items:center}
.b5-cuerpo .md-reel-marco{position:relative;width:min(340px,82vw);aspect-ratio:9/16;border-radius:22px;overflow:hidden;background:#000;box-shadow:0 30px 60px -30px rgba(0,0,0,.45)}
.b5-cuerpo .md-reel video{width:100%;height:100%;object-fit:cover;display:block}
.b5-cuerpo .md-reel-sonido{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);padding:9px 16px;border:0;border-radius:99px;background:rgba(0,0,0,.66);color:#fff;font:700 14px var(--sans,inherit);cursor:pointer;white-space:nowrap}
.b5-cuerpo .md-reel figcaption,.b5-cuerpo .md-img figcaption{font-size:14px;color:#5b625f;text-align:center}
.b5-cuerpo .md-calc{margin:28px 0;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;padding:18px 20px;border-radius:18px;background:#111110;color:#f4f4f0;text-decoration:none}
.b5-cuerpo .md-calc b{color:#d4ff3a;font-weight:700}
.b5-cuerpo .md-ig{margin:24px 0;display:grid;grid-template-columns:56px 1fr;gap:14px;align-items:center;padding:12px;border-radius:16px;background:#fff;border:1px solid #d9dedb;color:inherit;text-decoration:none}
.b5-cuerpo .md-ig-logo{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,#f58529,#dd2a7b 50%,#8134af)}
.b5-cuerpo .md-ig small{display:block;font-size:13px;color:#5b625f}
.b5-cuerpo .md-img{margin:28px 0;display:grid;gap:8px}.b5-cuerpo .md-img img{width:100%;height:auto;border-radius:16px}

/* ── /learn (19-10-2026, scripts/learn-v5.mjs, plan/LEARN.md) ──
   Segunda versión: pestañas de lección (una sección a la vista), filas que usan el ancho y piezas visuales. Tarjetas
   blancas como el resto; negro para lo que se elige, el lima sólo para «correcto», el rojo sólo para trampa y error.
   Sin JS (.l5 sin .l5-js) se ve todo seguido: las respuestas en <details>, las tarjetas en lista. */
.l5 [hidden]{display:none!important}
.l5{padding:0 var(--gutter) clamp(64px,8vw,104px)}
/* cabecera: la ruta y el título | la imagen; la entradilla y los datos debajo del título */
.l5-cab{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,400px);grid-template-areas:"tit img" "mas img";column-gap:clamp(28px,5vw,72px);align-items:end;padding:clamp(28px,4vw,56px) 0 clamp(28px,3vw,40px)}
.l5-cab-tit{grid-area:tit;align-self:end}
.l5-cab-mas{grid-area:mas;align-self:start}
.l5-cab .b5-titulo{max-width:none;margin-top:14px}
.l5-meta{margin-top:18px;font-size:14px;font-weight:600;color:var(--gris2)}
.l5-cab-img{grid-area:img;align-self:center;margin:0}
.l5-cab-img img{width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;object-position:50% 62%;border-radius:28px;box-shadow:var(--sombra)}
/* la ruta «Learn › Parte › Tema ▾»: un desplegable con los temas escritos */
.l5-ruta{position:relative;display:inline-block;z-index:15}
.l5-ruta summary{display:inline-flex;align-items:center;white-space:nowrap;gap:6px;min-height:40px;padding:0 14px;border-radius:999px;background:#fff;box-shadow:0 1px 0 rgba(17,24,39,.05),0 8px 18px -12px rgba(17,24,39,.3);
  list-style:none;cursor:pointer;font-size:13.5px;font-weight:600;color:var(--gris2)}
.l5-ruta summary::-webkit-details-marker{display:none}
.l5-ruta summary b{color:var(--tinta)}
.l5-ruta-sep{color:var(--gris3)}
.l5-ruta-flecha{margin-left:2px;color:var(--tinta);transition:transform .2s}
.l5-ruta[open] .l5-ruta-flecha{transform:rotate(180deg)}
.l5-ruta-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:260px;padding:16px 18px;border-radius:20px;background:#fff;box-shadow:var(--sombra)}
.l5-ruta-menu ul{list-style:none;margin:10px 0 0;padding:0}
.l5-ruta-menu a{display:flex;align-items:center;min-height:42px;padding:0 12px;border-radius:12px;font-size:15px;font-weight:600;color:var(--tinta)}
.b5 .l5-ruta-menu a:hover{background:#f3f4f2}
.b5 .l5-ruta-menu a[aria-current]{background:var(--tinta);color:#fff}
.l5-ruta-menu p{margin-top:10px;font-size:13.5px;color:var(--gris2)}
/* la lección como camino: pasos numerados, marca de hecho y barra de avance; pegados bajo el menú al bajar */
.l5-secs{position:sticky;top:68px;z-index:10;width:max-content;max-width:100%;margin:8px 0 clamp(24px,3vw,36px)}
.l5-secs-fila{list-style:none;display:flex;gap:4px;width:max-content;max-width:100%;margin:0;overflow-x:auto;padding:5px;border-radius:999px;background:rgba(255,255,255,.88);-webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4);box-shadow:var(--sombra);scrollbar-width:none}
.l5-secs-fila::-webkit-scrollbar{display:none}
.l5-sec-tab{display:inline-flex;align-items:center;gap:8px;flex:none;min-height:42px;padding:0 16px 0 8px;border-radius:999px;font-size:14.5px;font-weight:700;white-space:nowrap;color:var(--gris)}
.b5 .l5-sec-tab:hover{color:var(--tinta)}
.l5-sec-n{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#eceeeb;color:var(--gris);font-size:12.5px;font-weight:800}
.l5-sec-n i{font-style:normal}
.l5-sec-n svg{display:none}
.b5 .l5-js .l5-sec-on{background:var(--tinta);color:#fff}
.l5-js .l5-sec-on .l5-sec-n{background:#fff;color:var(--tinta)}
.l5-js .l5-hecho .l5-sec-n{background:var(--neon);color:var(--tinta)}
.l5-js .l5-hecho .l5-sec-n i{display:none}
.l5-js .l5-hecho .l5-sec-n svg{display:block}
.l5-avance{display:none;position:absolute;left:22px;right:22px;bottom:2px;height:3px;border-radius:999px;background:rgba(17,24,39,.08);overflow:hidden;pointer-events:none}
.l5-js .l5-avance{display:block}
.l5-avance i{display:block;width:0;height:100%;background:var(--tinta);transition:width .4s ease}
.l5-corto{display:none}
.l5-sec+.l5-sec{margin-top:56px}
.l5-js .l5-sec+.l5-sec{margin-top:0}
.l5-h2{font-size:clamp(28px,3.4vw,44px);font-weight:700;line-height:1.08;letter-spacing:-.03em;color:var(--tinta)}
.l5-p{font-size:17.5px;line-height:1.68;color:#22221f}
.l5-p b{color:var(--tinta)}
.l5-p-sec{max-width:var(--lectura);margin-top:10px}
.l5-col{display:flex;flex-direction:column;gap:12px}
.l5-caja{padding:22px 24px;border-radius:22px;background:#fff;box-shadow:var(--sombra)}
.l5-caja h3{margin-top:6px;font-size:19px;font-weight:700;line-height:1.25;letter-spacing:-.015em;color:var(--tinta)}
.l5-caja p{margin-top:8px;font-size:16.5px;line-height:1.6;color:#22221f}
.l5-caja b{color:var(--tinta)}
.l5-rot{display:block;font-size:11px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--gris2)}
.b5 a.l5-sig{display:inline-flex;align-items:center;gap:10px;min-height:52px;margin-top:28px;padding:0 24px;border-radius:999px;background:var(--tinta);color:#fff;font-size:15px;font-weight:700}
.b5 .l5-sig:hover{transform:translateY(-1px)}
/* The idea */
.l5-idea{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:24px;align-items:start;margin-top:24px}
.l5-idea-una{grid-template-columns:minmax(0,820px)}
.l5-idea-una .l5-subr{margin-top:0}
.l5-cuad{margin:0}
.l5-cuad svg{display:block;width:100%;height:auto}
.l5-lleno{fill:var(--tinta)}
.l5-vacio{fill:#e9ebe8}
.l5-grupo{fill:none;stroke:rgba(17,24,39,.18);stroke-width:2;stroke-dasharray:5 5}
.l5-grupos svg{max-width:280px;margin:0 auto}
.l5-suma{fill:var(--neon);stroke:var(--tinta);stroke-width:1}
.l5-bar-v{font-size:15px;font-weight:700;text-anchor:middle;fill:var(--tinta)}
.l5-bar-e{font-size:13px;font-weight:600;text-anchor:middle;fill:var(--gris2)}
.l5-barras svg{max-width:340px;margin:0 auto}
.l5-recta-l{stroke:rgba(17,24,39,.15);stroke-width:2}
.l5-recta-m{stroke:var(--tinta);stroke-width:2.5;stroke-linecap:round}
.l5-recta svg{max-width:340px;margin:0 auto}
.l5-eje-n{font-size:12px;font-weight:600;text-anchor:middle;fill:var(--gris2)}
.l5-eje-fuerte{font-size:14px;font-weight:800;fill:var(--tinta)}
.l5-rectanum svg{max-width:400px;margin:0 auto}
.l5-geo svg{max-width:360px;margin:0 auto}
.l5-geo-area{fill:#eef6d2;stroke:var(--tinta);stroke-width:2.5;stroke-linejoin:round}
.l5-geo-area2{fill:#e2ecc0;stroke:var(--tinta);stroke-width:2.5;stroke-linejoin:round}
.l5-geo-area3{fill:#d3df9f;stroke:var(--tinta);stroke-width:2.5;stroke-linejoin:round}
.l5-geo-hueco{fill:#fff;stroke:rgba(17,24,39,.35);stroke-width:2;stroke-dasharray:6 5}
.l5-geo-l{stroke:var(--tinta);stroke-width:2.5;stroke-linecap:round}
.l5-geo-disc{stroke-dasharray:6 6;stroke:rgba(17,24,39,.45)}
.l5-geo-p{fill:var(--tinta)}
.l5-geo-t{font-size:20px;font-weight:700;text-anchor:middle;fill:var(--tinta)}
.l5-geo-gris{fill:var(--gris2)}
.l5-geo-fuerte{font-size:21px;font-weight:800}
.l5-geo-pildora{font-size:18px}
.l5-geo-cuna{fill:#e1e4df}
.l5-geo-cuna2{fill:var(--neon);stroke:var(--tinta);stroke-width:1.2}
.l5-geo-rej{stroke:rgba(17,24,39,.07);stroke-width:1}
.l5-geo-eje{stroke:rgba(17,24,39,.55);stroke-width:2}
.l5-hora svg{max-width:340px;margin:8px auto}
.l5-vacio-oscuro{fill:#b9bdb6}
.l5-media-l{stroke:var(--tinta);stroke-width:2.5;stroke-dasharray:7 6}
.l5-media-t{font-size:16px;font-weight:800;fill:var(--tinta)}
.l5-media svg{max-width:340px;margin:0 auto}
.l5-serie-c{fill:#fff;stroke:var(--tinta);stroke-width:2.5}
.l5-serie-q{fill:var(--neon);stroke:var(--tinta);stroke-width:2.5}
.l5-serie-n{font-size:20px;font-weight:700;text-anchor:middle;fill:var(--tinta)}
.l5-serie-arco{fill:none;stroke:rgba(17,24,39,.35);stroke-width:2}
.l5-serie-d{font-size:17px;font-weight:800;text-anchor:middle;fill:var(--tinta)}
.l5-serie svg{max-width:400px;margin:4px auto 0}
.l5-graf svg{max-width:380px;margin:12px auto 0}
.l5-rejilla-l{stroke:rgba(17,24,39,.08);stroke-width:1}
.l5-eje-t{font-size:12px;font-weight:600;text-anchor:end;fill:var(--gris2)}
.l5-linea-l{fill:none;stroke:var(--tinta);stroke-width:3;stroke-linejoin:round}
.l5-linea-r{stroke:var(--neon);stroke-width:9;stroke-linecap:round;opacity:.95}
.l5-linea-p{fill:var(--neon);stroke:var(--tinta);stroke-width:2}
.l5-tabla .l5-rot{text-transform:none;letter-spacing:0;font-size:14.5px;font-weight:700;line-height:1.4;color:var(--tinta)}
.l5-tabla table{width:100%;margin-top:12px;border-collapse:collapse;font-size:16px}
.l5-tabla th,.l5-tabla td{padding:10px 8px;text-align:center;border-bottom:1px solid rgba(17,24,39,.08)}
.l5-tabla thead th{font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--gris2)}
.l5-tabla tbody th{text-align:left;font-weight:700;color:var(--tinta)}
.l5-tabla td{font-weight:600;font-variant-numeric:tabular-nums}
.l5-cuad figcaption{margin-top:14px;font-size:14.5px;font-weight:600;color:var(--gris2);text-align:center}
.l5-tres{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.l5-mini{padding:18px}
.l5-mini b{display:block;margin-top:10px;font-size:clamp(26px,2.8vw,34px);font-weight:700;letter-spacing:-.03em;line-height:1}
.l5-clave{margin-top:4px}
/* el enunciado marcado y el diccionario palabra → símbolo */
.l5-subr{margin:24px 0 0}
.l5-subr .l5-rot{margin-bottom:10px}
.l5-subr p{margin:0;font-size:clamp(18px,1.9vw,21px);line-height:1.75;color:var(--tinta)}
.l5-subr mark{padding:2px 4px;border-radius:6px;color:inherit;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.l5-pide{background:var(--neon)}
.l5-dato{background:#e4e8ee;box-shadow:inset 0 -2px 0 rgba(17,24,39,.35)}
.l5-sobra{background:transparent;color:var(--gris3)!important;text-decoration:line-through;text-decoration-color:rgba(17,24,39,.35)}
.l5-subr figcaption{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:16px;padding-top:14px;border-top:1px solid rgba(17,24,39,.08);font-size:13.5px;font-weight:700;color:var(--gris2)}
.l5-subr figcaption span{display:inline-flex;align-items:center;gap:8px}
.l5-subr figcaption mark{display:inline-block;width:22px;height:12px;padding:0;border-radius:4px}
.l5-subr figcaption .l5-sobra{background:#f1f2f0;border:1px dashed rgba(17,24,39,.3)}
.l5-dicc{padding:6px 20px}
.l5-dicc-fila{display:grid;grid-template-columns:minmax(0,1.2fr) auto;column-gap:14px;align-items:baseline;padding:12px 0}
.l5-dicc-fila+.l5-dicc-fila{border-top:1px solid rgba(17,24,39,.07)}
.l5-dicc-pal{font-size:15.5px;font-weight:700;color:var(--tinta)}
.l5-dicc-fila b{justify-self:end;font-size:17px}
.l5-dicc-fila small{grid-column:1/-1;margin-top:2px;font-size:14px;color:var(--gris2)}
/* la cadena: la expresión entera, línea a línea, con la pieza que cambia resaltada */
.l5-cadena ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;align-items:center;gap:4px;counter-reset:c}
.l5-cadena li{position:relative;padding:8px 14px;font-size:clamp(20px,2.4vw,25px);font-weight:600;letter-spacing:-.01em;color:var(--tinta);font-variant-numeric:tabular-nums;white-space:nowrap}
.l5-cadena li+li::before{content:"=";position:absolute;left:-18px;top:8px;color:var(--gris3);font-weight:700}
.l5-cadena mark{padding:1px 6px;border-radius:7px;background:var(--neon);color:var(--tinta)}
.l5-cadena .l5-cadena-fin{font-weight:800}
.l5-cadena figcaption{margin-top:12px;padding-top:12px;border-top:1px solid rgba(17,24,39,.08);font-size:14.5px;font-weight:600;color:var(--gris2);text-align:center}
/* Learn: el mini índice de pasos y cada paso una fila */
.l5-saltos ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0;padding:0}
.l5-saltos a{display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:0 14px 0 6px;border-radius:999px;background:#fff;box-shadow:0 1px 0 rgba(17,24,39,.05),0 8px 18px -12px rgba(17,24,39,.3);font-size:13.5px;font-weight:700;color:var(--tinta2)}
.l5-saltos span{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#eceeeb;font-size:12px}
.b5 .l5-saltos a:hover{box-shadow:0 0 0 1px rgba(17,24,39,.2),0 8px 18px -12px rgba(17,24,39,.3)}
.l5-paso{scroll-margin-top:150px}
.l5-paso-sig{display:none}
.l5-pasos{list-style:none;margin:28px 0 0;padding:0}
.l5-paso{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:start;padding:36px 0;border-top:1px solid rgba(17,24,39,.1)}
.l5-paso:first-child{border-top:0;padding-top:4px}
.l5-paso-txt{display:flex;flex-direction:column;gap:14px}
.l5-paso-cab{display:flex;align-items:center;gap:14px}
.l5-num{flex:none;display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--tinta);color:#fff;font-size:15px;font-weight:700}
.l5-paso-txt h3{font-size:clamp(22px,2.2vw,27px);font-weight:700;line-height:1.15;letter-spacing:-.025em;color:var(--tinta)}
.l5-formula{padding:20px 22px;border-radius:20px;background:#fff;box-shadow:var(--sombra);text-align:center;font-size:clamp(20px,2.2vw,24px);font-weight:700;letter-spacing:-.015em;color:var(--tinta)}
.l5-formula span{white-space:nowrap}
.l5-casos{display:flex;flex-direction:column;gap:10px}
.l5-caso{padding:16px 20px}
.l5-caso .l5-caso-q{margin-top:6px;font-size:16.5px;font-weight:600;color:var(--tinta)}
.l5-caso .l5-caso-a{margin-top:4px;font-size:16px;color:var(--gris)}
.l5-fichas{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.l5-ficha{padding:16px}
.l5-ficha b{display:block;font-family:var(--cond);font-weight:400;font-size:40px;line-height:1}
.l5-ficha p{margin-top:8px;font-size:14px;line-height:1.45}
.l5-ficha small{display:block;margin-top:8px;font-size:13px;font-weight:700;color:var(--gris2)}
.l5-mult{padding:8px 20px}
.l5-mult-fila{display:grid;grid-template-columns:1.1fr 1fr auto;gap:12px;align-items:center;padding:12px 0;font-size:15.5px}
.l5-mult-fila+.l5-mult-fila{border-top:1px solid rgba(17,24,39,.07)}
.l5-mult-fila span:first-child{font-weight:700;color:var(--tinta)}
.l5-mult-fila span+span{color:var(--gris2)}
.l5-mult-fila b{font-size:17px}
.l5-ejemplo ol{margin:10px 0 0;padding-left:1.3em;font-size:16.5px;line-height:1.6}
.l5-ejemplo li+li{margin-top:6px}
.l5-ejemplo li::marker{color:var(--gris3);font-weight:700}
.l5-caja .l5-resp{margin-top:14px;padding-top:12px;border-top:1px solid rgba(17,24,39,.08);font-weight:700;color:var(--tinta)}
.l5-resp span{margin-right:10px;font-size:11px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--gris2)}
.l5-atajo .l5-rot{color:var(--tinta)}
/* Watch out */
.l5-trampas{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
.l5-trampa .l5-rot{color:#b23a2e}
.l5-caja .l5-mal,.l5-caja .l5-bien{display:flex;align-items:baseline;gap:12px;margin-top:10px;padding:10px 14px;border-radius:12px;font-size:16px}
.l5-caja .l5-mal{background:#fbf1ef}
.l5-caja .l5-bien{background:#f3f7e6}
.l5-mal span,.l5-bien span{flex:none;width:44px;font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.l5-mal span{color:#b23a2e}
.l5-bien span{color:var(--tinta)}
.l5-mal s{color:#7a2a22;text-decoration-thickness:2px;text-decoration-color:#b23a2e}
/* Practice */
.l5-pregs{max-width:720px;margin-top:24px;display:flex;flex-direction:column;gap:12px}
.l5-preg-cab{display:flex;align-items:center;justify-content:space-between;gap:16px}
.l5-preg-barra{width:120px;height:6px;border-radius:999px;background:rgba(17,24,39,.1);overflow:hidden}
.l5-preg-barra i{display:block;height:100%;background:var(--tinta)}
.l5-caja .l5-preg-q{margin-top:12px;font-size:19px;font-weight:600;line-height:1.45;color:var(--tinta)}
.l5-ops{list-style:none;display:grid;gap:8px;margin:16px 0 0;padding:0}
.l5-op{display:flex;align-items:center;gap:12px;width:100%;min-height:54px;padding:8px 14px 8px 8px;border-radius:14px;border:1px solid rgba(17,24,39,.12);background:#fbfbfa;font:inherit;font-size:16.5px;text-align:left;color:var(--tinta);cursor:pointer;transition:border-color .15s,background .15s}
.l5-op b{display:grid;place-items:center;flex:none;width:36px;height:36px;border-radius:10px;background:#efefec;font-size:14px}
.l5-op:hover{border-color:rgba(17,24,39,.4)}
.l5-op:focus-visible{outline:2px solid var(--tinta);outline-offset:2px}
.l5-hecha .l5-op{cursor:default}
.l5-hecha .l5-op:not(.l5-bien):not(.l5-mal){opacity:.5}
.l5-op.l5-bien{border-color:var(--tinta);background:#fff}
.l5-op.l5-bien b{background:var(--neon);color:var(--tinta)}
.l5-op.l5-mal{border-color:#b23a2e;background:#fbf1ef}
.l5-op.l5-mal b{background:#b23a2e;color:#fff}
.l5-por{margin-top:12px}
.l5-por summary{display:inline-flex;align-items:center;min-height:44px;font-size:15px;font-weight:700;cursor:pointer;color:var(--tinta);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:3px;text-decoration-color:rgba(11,11,10,.3)}
.l5-por[open] summary{text-decoration:none;color:var(--gris2)}
.l5-sig-preg,.l5-otra-vez{display:inline-flex;align-items:center;gap:10px;min-height:50px;margin-top:14px;padding:0 22px;border:0;border-radius:999px;background:var(--tinta);color:#fff;font:inherit;font-size:15px;font-weight:700;cursor:pointer}
.l5-nota{text-align:center;padding:36px 24px}
.l5-nota .l5-nota-n{display:block;margin-top:10px;font-family:var(--cond);font-weight:400;font-size:72px;line-height:1}
/* Flashcards: sin JS, una lista; con JS (.l5-vivo), una tarjeta que gira */
.l5-mazo{max-width:640px;margin-top:24px}
.l5-mazo-cab{display:none}
.l5-tarjetas{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0;padding:0}
.l5-tarjeta-giro{display:block;width:100%;height:100%;padding:16px 18px;border:0;border-radius:18px;background:#fff;box-shadow:var(--sombra);font:inherit;text-align:left;color:var(--tinta);cursor:pointer}
.l5-cara{display:block;font-size:16px;font-weight:700;line-height:1.4}
.l5-cara small{display:block;margin-bottom:4px;font-size:11px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--gris2)}
.l5-dorso{margin-top:8px;font-weight:500;color:var(--gris)}
.l5-dorso small,.l5-girar{display:none}
.l5-vivo .l5-mazo-cab{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.l5-mazo-cuenta{font-size:14px;font-weight:700;color:var(--gris2)}
.l5-mazo-barra{width:140px;height:6px;border-radius:999px;background:rgba(17,24,39,.1);overflow:hidden}
.l5-mazo-barra i{display:block;width:0;height:100%;background:var(--tinta);transition:width .3s ease}
.l5-vivo .l5-tarjetas{display:block}
.l5-vivo .l5-tarjeta{display:none;perspective:1400px}
.l5-vivo .l5-tarjeta.l5-actual{display:block}
.l5-vivo .l5-tarjeta-giro{position:relative;min-height:260px;padding:0;background:none;box-shadow:none;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.l5-vivo .l5-girada .l5-tarjeta-giro{transform:rotateY(180deg)}
.l5-vivo .l5-cara{position:absolute;inset:0;display:grid;place-items:center;margin:0;padding:48px 28px 44px;border-radius:24px;text-align:center;font-size:clamp(20px,2.4vw,25px);line-height:1.35;-webkit-backface-visibility:hidden;backface-visibility:hidden}
.l5-vivo .l5-frente{background:#fff;box-shadow:var(--sombra);color:var(--tinta);font-weight:700}
.l5-vivo .l5-dorso{background:var(--tinta);color:#fff;font-weight:600;transform:rotateY(180deg)}
.l5-vivo .l5-cara small{position:absolute;top:18px;left:22px;margin:0}
.l5-vivo .l5-dorso small{display:block;color:rgba(255,255,255,.6)}
.l5-dorso-txt{display:block}.l5-dorso-txt b{display:block}.l5-dorso-por{display:block;margin-top:6px;font-size:15px;font-weight:500;line-height:1.45;text-wrap:balance}
.l5-vivo .l5-larga .l5-tarjeta-giro{min-height:340px}.l5-vivo .l5-larga .l5-frente{font-size:clamp(17px,2vw,21px)}
.l5-vivo .l5-frente{align-content:center}.l5-frente-pasaje{display:block;font-weight:500}.l5-frente-preg{display:block;margin-top:10px}
.l5-vivo .l5-dorso-por{margin-top:12px;font-size:16px;color:rgba(255,255,255,.78)}
.l5-vivo .l5-girar{display:block;position:absolute;bottom:18px;left:0;right:0;font-style:normal;font-size:12.5px;font-weight:600;color:var(--gris3)}
.l5-mazo-botones{display:flex;gap:10px;margin-top:12px}
.l5-otra{flex:1;min-height:52px;border-radius:999px;border:1px solid rgba(17,24,39,.14);background:#fff;font:inherit;font-size:15px;font-weight:700;color:var(--tinta);cursor:pointer}
.l5-otra:active{transform:scale(.98)}
.b5 .l5-otra-si{background:var(--tinta);border-color:var(--tinta);color:#fff}
.l5-mazo-fin{margin-top:14px;text-align:center;font-weight:600}
.l5-reiniciar{border:0;background:none;font:inherit;font-weight:700;text-decoration:underline;text-underline-offset:3px;cursor:pointer;color:var(--tinta)}
/* final de la lección */
.l5-fin{margin-top:48px;padding:28px 32px;border:2px solid var(--tinta)}
.l5-fin h3{font-size:clamp(22px,2.4vw,28px)}
.l5-caja .l5-fin-nota{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 12px;margin-top:10px;font-size:16.5px}
.b5 a.l5-fin-ir{font-size:14.5px;font-weight:700;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(11,11,10,.3)}
.b5 a.l5-fin-sig{display:inline-flex;align-items:center;gap:10px;min-height:50px;margin-top:18px;padding:0 22px;border-radius:999px;background:var(--tinta);color:#fff;font-size:15px;font-weight:700}
.l5-caja .l5-fin-pronto{margin-top:14px;font-weight:600;color:var(--gris2)}
/* la barra fija de «Next» (sólo en el móvil y con JS) */
.l5-barra{display:none}
/* los posts del blog del mismo tema */
.l5-blog{margin-top:12px}
.l5-blog ul{list-style:none;margin:10px 0 0;padding:0}
.l5-blog li+li{border-top:1px solid rgba(17,24,39,.07)}
.b5 .l5-blog a{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:48px;font-size:16px;font-weight:700;color:var(--tinta)}
.l5h-blog{margin-top:24px;max-width:720px}
/* la app */
.l5-app{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:12px;padding:28px 32px;background:var(--tinta);color:rgba(255,255,255,.78)}
.l5-app .l5-rot{color:rgba(255,255,255,.55)}
.l5-app h3,.l5-app b{color:#fff}
.l5-app p{max-width:60ch;color:rgba(255,255,255,.75)}
.b5 a.l5-app-btn{display:inline-flex;align-items:center;flex:none;gap:10px;min-height:50px;padding:0 22px;border-radius:999px;background:#fff;color:var(--tinta);font-size:15px;font-weight:700}
@media(prefers-reduced-motion:reduce){.l5-vivo .l5-tarjeta-giro,.l5-mazo-barra i{transition:none}}
@media(max-width:900px){
  .l5-cab{grid-template-columns:minmax(0,1fr) 180px;column-gap:24px}
  .l5-cab-img img{border-radius:22px}
  .l5-idea,.l5-paso{grid-template-columns:minmax(0,1fr)}
  .l5-idea .l5-cuad{max-width:360px}
  .l5-paso{gap:18px;padding:28px 0}
  .l5-app{flex-direction:column;align-items:flex-start}
}
@media(max-width:620px){
  .l5{padding-bottom:96px}
  .l5-cab{grid-template-columns:minmax(0,1fr) 104px;grid-template-areas:"tit img" "mas mas";column-gap:16px;align-items:end;padding-top:20px}
  .l5-cab-img{align-self:end}
  .l5-cab-img img{aspect-ratio:4/5;border-radius:18px}
  .l5-cab .b5-titulo{font-size:34px}
  .l5-cab-mas .b5-entradilla{margin-top:16px}
  .l5-ruta summary{font-size:12.5px;padding:0 12px}
  .l5-ruta-a:first-child,.l5-ruta-a:first-child+.l5-ruta-sep{display:none}
  .l5-sec-tab{gap:0;position:relative}.l5-sec-n{display:none}
  .l5-js .l5-hecho::after{content:"";position:absolute;top:7px;right:7px;width:8px;height:8px;border-radius:50%;background:var(--neon);box-shadow:0 0 0 1.5px var(--tinta)}
  .l5-secs{width:auto;max-width:none}
  .l5-avance{left:calc(var(--gutter) + 22px);right:calc(var(--gutter) + 22px)}
  .l5-js .l5-sig{display:none}
  .l5-paso-sig{display:inline-flex;align-items:center;gap:6px;grid-column:1/-1;margin-top:-4px;font-size:14px;font-weight:700;color:var(--gris)}
  .l5-js .l5-barra{display:block;position:fixed;left:0;right:0;bottom:0;z-index:30;padding:12px var(--gutter) calc(12px + env(safe-area-inset-bottom));
    background:rgba(244,247,246,.9);-webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4);border-top:1px solid rgba(17,24,39,.08);transition:transform .3s ease}
  .l5-js .l5-barra.l5-barra-fuera{transform:translateY(110%)}
  .b5 a.l5-barra-btn{display:flex;align-items:center;justify-content:center;gap:10px;min-height:52px;border-radius:999px;background:var(--tinta);color:#fff;font-size:15.5px;font-weight:700}
  .l5-fin{padding:22px}
  .l5-secs{top:60px;margin-left:calc(-1 * var(--gutter));margin-right:calc(-1 * var(--gutter));padding:0 var(--gutter)}
  .l5-secs-fila{width:auto}
  .l5-sec-tab{flex:1;justify-content:center;padding:0 10px;font-size:14px}
  .l5-largo{display:none}.l5-corto{display:inline}
  .l5-idea .l5-cuad{max-width:none}.l5-cuad svg{max-width:250px;margin:0 auto}
  .l5-trampas,.l5-tarjetas{grid-template-columns:minmax(0,1fr)}
  .l5-tres{gap:8px}.l5-mini{padding:14px}.l5-mini b{font-size:24px}
  .l5-fichas{grid-template-columns:minmax(0,1fr)}
  .l5-ficha{display:grid;grid-template-columns:76px minmax(0,1fr);column-gap:14px;align-items:center}
  .l5-ficha b{grid-row:span 2}.l5-ficha p{margin-top:0}
  .l5-caja{padding:18px}.l5-formula{padding:18px}
  .l5-caja .l5-preg-q{font-size:17.5px}
  .l5-app{padding:24px}
}

/* ── /learn: los índices (las 4 partes; los temas de una parte) ── */
.l5h{padding-bottom:clamp(64px,8vw,104px)}
.l5h-cab{padding-top:clamp(36px,5vw,72px)}
.l5h-h2{margin:8px 0 20px}
.l5h-ruta{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--gris2)}
.b5 .l5h-ruta a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(11,11,10,.3)}
.l5h-ruta b{color:var(--tinta)}
.l5h-partes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.l5h-parte{position:relative;display:flex;flex-direction:column;gap:6px;min-height:170px;padding:26px 28px}
.b5 a.l5h-parte{transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.b5 a.l5h-parte:hover{transform:translateY(-3px)}
.l5h-parte-c{font-family:var(--cond);font-size:44px;line-height:1;color:var(--tinta)}
.l5h-parte b{font-size:21px;letter-spacing:-.02em;color:var(--tinta)}
.l5h-parte small{font-size:14.5px;font-weight:600;color:var(--gris2)}
.l5h-ir{display:inline-flex;align-items:center;gap:8px;margin-top:auto;padding-top:10px;font-size:14.5px;font-weight:700;color:var(--tinta)}
.l5h-pronto{background:rgba(255,255,255,.5);box-shadow:none;border:1px dashed rgba(17,24,39,.18)}
.l5h-pronto .l5h-parte-c,.l5h-pronto b{color:var(--gris3)}
.l5h-temas{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:8px 0 0;padding:0}
.l5h-tema{display:flex;flex-direction:column;height:100%;padding:0;overflow:hidden}
.b5 a.l5h-tema{transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.b5 a.l5h-tema:hover{transform:translateY(-3px)}
.l5h-tema-img{position:relative;display:block;aspect-ratio:4/3;overflow:hidden;background:#e9ece8}
.l5h-tema-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.b5 a.l5h-tema:hover .l5h-tema-img img{transform:scale(1.04)}
.l5h-hecho{position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;background:var(--neon);color:var(--tinta);font-style:normal;font-size:12.5px;font-weight:800}
.l5h-tema-txt{display:flex;flex-direction:column;gap:6px;padding:16px 20px 20px;flex:1}
.l5h-tema-txt small{font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--gris2)}
.l5h-tema-txt b{font-size:19px;line-height:1.2;letter-spacing:-.02em;color:var(--tinta)}
.l5h-tema-txt span{font-size:14.5px;line-height:1.5;color:var(--gris);flex:1}
.l5h-tema-txt i{margin-top:6px;font-style:normal;font-size:13px;font-weight:700;color:var(--gris2)}
.l5-ruta-todo{display:inline-flex;align-items:center;gap:8px;margin-top:10px;font-size:14px;font-weight:700;color:var(--tinta)}
@media(max-width:1000px){.l5h-temas{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.l5h-partes,.l5h-temas{grid-template-columns:minmax(0,1fr)}.l5h-parte{min-height:0;padding:22px}
  .l5h-tema{flex-direction:row}.l5h-tema-img{flex:none;width:110px;aspect-ratio:auto}.l5h-tema-txt{padding:14px 16px}.l5h-tema-txt span{display:none}.l5h-hecho{left:8px;top:8px;padding:4px 8px;font-size:11px}}