/* Blog (4 nov 2026): buscador y secciones en el índice; progreso de lectura,
   índice del artículo y "Siguiente" al leer. Lo enciende blog.js; sin JS el blog
   se ve igual que antes. Letra: la sans del sitio (nunca la mono). */

/* ── índice: barra de búsqueda y secciones, pegada arriba al hacer scroll ── */
.bfiltros{position:sticky;top:72px;z-index:5;margin:0 0 clamp(24px,3vw,36px);padding:12px 0;
  background:color-mix(in srgb,var(--surface-page,#fff) 92%,transparent);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-subtle)}
.bfiltros-fila{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.bbusca{position:relative;flex:1 1 260px;max-width:420px}
.bbusca svg{position:absolute;left:14px;top:50%;width:16px;height:16px;translate:0 -50%;color:var(--text-muted);pointer-events:none}
.bbusca input{width:100%;font:inherit;font-size:15px;padding:11px 14px 11px 40px;border:1px solid var(--border-default);
  border-radius:var(--radius-pill);background:var(--surface-page,#fff);color:var(--text-strong)}
.bbusca input:focus{outline:2px solid var(--ink);outline-offset:2px}
.bchips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding:2px}
.bchips::-webkit-scrollbar{display:none}
.bchip{flex:none;font:inherit;font-size:13.5px;line-height:1;padding:9px 14px;border-radius:var(--radius-pill);cursor:pointer;
  border:1px solid var(--border-default);background:var(--surface-page,#fff);color:var(--text-body);transition:background .2s,color .2s,border-color .2s}
.bchip:hover{border-color:var(--ink);color:var(--text-strong)}
.bchip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.bchip small{font-size:12px;margin-left:5px;opacity:.6}
.bconteo{margin:10px 0 0;font-size:13px;color:var(--text-muted)}
.bvacio{padding:48px 0;text-align:center;color:var(--text-body)}
.bvacio button{font:inherit;border:0;background:none;padding:0;color:var(--text-strong);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.bcard[hidden]{display:none}
.bcard.b-entra{animation:bEntra .45s var(--ease-out,cubic-bezier(.2,.7,.2,1)) both}
@keyframes bEntra{from{opacity:0;transform:translateY(10px)}}
@media(max-width:640px){.bfiltros{top:60px}.bbusca{max-width:none}}

/* ── artículo: barra de progreso ── */
.bprogreso{position:fixed;left:0;top:0;z-index:60;height:2px;width:100%;transform-origin:0 50%;transform:scaleX(0);background:var(--verde,#0FA47A);pointer-events:none}

/* ── artículo: "En este artículo" ── */
.btoc{margin:0 0 var(--space-6,32px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg,16px);padding:18px 20px}
.btoc summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:var(--fw-medium);color:var(--text-strong)}
.btoc summary::-webkit-details-marker{display:none}
.btoc summary::after{content:"+";font-weight:400;color:var(--text-muted)}
.btoc[open] summary::after{content:"–"}
.btoc ol{margin:14px 0 0;padding:0;list-style:none;counter-reset:t;display:grid;gap:8px}
.btoc li{counter-increment:t;display:grid;grid-template-columns:22px 1fr;font-size:14.5px;line-height:1.4;margin:0}
.btoc li::before{content:counter(t);color:var(--text-muted);font-size:12.5px;padding-top:1px}
.articulo .btoc a{text-decoration:none;color:var(--text-body)}
.articulo .btoc a:hover,.articulo .btoc a.activo{color:var(--text-strong);text-decoration:underline;text-underline-offset:3px}
/* en pantallas anchas, el índice se queda a un lado mientras lees */
@media(min-width:1280px){
  .btoc--lado{position:fixed;top:120px;left:max(24px,calc(50% - 36ch - 300px));width:240px;margin:0;border:0;padding:0;
    opacity:0;pointer-events:none;transition:opacity .3s}
  .btoc--lado.visible{opacity:1;pointer-events:auto}
  .btoc--lado summary{font-size:13px;color:var(--text-muted)}
  .btoc--lado summary::after{content:none}
  .btoc--lado li{font-size:13.5px}
}

/* ── artículo: "Siguiente artículo" ── */
.bsig{display:block;position:relative;margin:var(--space-8,48px) 0 0;padding:26px 28px;border:1px solid var(--border-subtle);border-radius:var(--radius-lg,16px);
  text-decoration:none;transition:transform .3s var(--ease-out,ease),box-shadow .3s}
.articulo a.bsig{text-decoration:none}
.bsig:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.bsig-k{display:block;margin:0 0 8px;font-size:12.5px;color:var(--text-muted)}
.bsig-t{display:block;font-size:clamp(20px,2.2vw,26px);line-height:1.2;letter-spacing:-.02em;font-weight:var(--fw-medium);color:var(--text-strong);text-wrap:balance}
.bsig-d{display:block;margin:10px 0 0;font-size:14.5px;color:var(--text-body)}
@media(prefers-reduced-motion:reduce){.bcard.b-entra{animation:none}.bsig{transition:none}}