/* 5 · Cómo funciona · v4 (05-10-2026): fondo negro, línea de tiempo vertical de checks que avanza con el scroll y el cerebro en contorno gris
   muy suave encima de la red de neuronas (sin bordes, con puntos y degradado, como detrás de la cabeza del robot). Copia de la v3.3 en web3-archivo/como-v3.3-cerebro.css. */
.s-como{ --e:cubic-bezier(.16,1,.3,1); position:relative; background:#000; color:#fff; overflow-x:clip; isolation:isolate; padding-bottom:144px; }
.s-como p, .s-como h3, .s-como h4{ margin:0; }
.s-como ul, .s-como ol{ list-style:none; margin:0; padding:0; }

/* Cabecera */
.cf-cab{ padding-top:128px; text-align:center; }
.cf-h2{ margin:0; font-size:clamp(40px, 5vw, 72px); font-weight:500; line-height:1.02; letter-spacing:-.045em; text-wrap:balance; }
.cf-h2 > span{ display:inline-block; }
.cf-h2-a{ color:rgba(255,255,255,.45); }
.cf-h2-b{ color:#fff; }
.cf-sub{ max-width:660px; margin:24px auto 0 !important; font-size:clamp(17px, 1.5vw, 20px); line-height:1.45; letter-spacing:-.012em; color:rgba(255,255,255,.56); text-wrap:balance; }

/* ---------- La línea de tiempo ---------- */
.cf-linea-w{ position:relative; margin-top:104px; }
.cf-rail{ position:absolute; z-index:0; left:60px; width:2px; margin-left:-1px; background:rgba(255,255,255,.1); border-radius:2px; }
.cf-rail-luz{ position:absolute; inset:0; border-radius:2px; background:linear-gradient(180deg, var(--verde), #d6fff2); box-shadow:0 0 12px rgba(60,193,160,.6); transform-origin:50% 0; transform:scaleY(0); }
.cf-linea{ display:flex; flex-direction:column; gap:128px; padding-left:104px !important; }
.cf-paso{ position:relative; display:grid; grid-template-columns:minmax(0, 400px) minmax(0, 1fr); gap:56px; align-items:start; }
.cf-nodo{ position:absolute; z-index:2; left:-104px; top:-6px; width:56px; height:56px; border-radius:50%; background:#000; border:1px solid rgba(255,255,255,.16); display:grid; place-items:center;
  transition:background .4s, border-color .4s, box-shadow .4s; }
.cf-n{ font-style:normal; font-size:14px; font-weight:600; letter-spacing:.04em; color:rgba(255,255,255,.55); font-variant-numeric:tabular-nums; transition:color .3s; }
.cf-ok{ display:none; place-items:center; color:var(--tinta); }
.cf-ok .ico{ width:22px; height:22px; stroke-width:2.6; }
.cf-paso.hecho .cf-nodo{ background:var(--verde); border-color:var(--verde); box-shadow:0 0 0 6px rgba(60,193,160,.14), 0 0 28px rgba(60,193,160,.45); }
.cf-paso.hecho .cf-n{ display:none; }
.cf-paso.hecho .cf-ok{ display:grid; animation:cfOk .45s var(--e); }
@keyframes cfOk{ from{ transform:scale(.4); opacity:0; } to{ transform:none; opacity:1; } }
.cf-num{ display:block; margin-bottom:10px; font-size:13px; font-weight:600; letter-spacing:.12em; color:var(--verde); }
.cf-txt h3{ font-size:clamp(26px, 2.6vw, 38px); font-weight:500; line-height:1.1; letter-spacing:-.03em; text-wrap:balance; }
.cf-txt p{ max-width:420px; margin-top:14px; font-size:17px; line-height:1.5; color:rgba(255,255,255,.56); text-wrap:pretty; }

/* iconos */
.cf-ico{ width:30px; height:30px; border-radius:8px; flex:none; display:grid; place-items:center; background:#26262a; color:#ececef; }
.cf-ico .ico, .cf-ico svg{ width:16px; height:16px; }
.cf-ico.wa{ background:#25d366; color:#fff; }
.cf-ico.ig{ background:radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285aeb 90%); }
.cf-ico.tuapp{ background:#fff; color:var(--tinta); font-size:10px; font-weight:700; letter-spacing:.02em; }

/* 01 · etiquetas */
.cf-tags{ display:flex; flex-wrap:wrap; gap:10px; padding-top:30px !important; }
.cf-tags li{ display:inline-flex; align-items:center; gap:10px; padding:7px 16px 7px 7px; border-radius:999px; background:#0f0f11; border:1px solid rgba(255,255,255,.1); font-size:14.5px; color:#ececef; }

/* 02 · el cerebro y lo que repasa */
.cf-p2{ grid-template-columns:1fr; gap:0; }
.cf-saber{ display:grid; grid-template-columns:minmax(0, 1fr) 520px minmax(0, 1fr); gap:28px; align-items:center; margin-top:8px; }
.cf-col h4{ margin:6px 0 14px !important; font-size:21px; font-weight:500; line-height:1.2; letter-spacing:-.02em; }
.cf-sub-n{ font-size:11.5px; font-weight:600; letter-spacing:.12em; text-transform:uppercase; color:var(--verde); }
.cf-col-a{ text-align:right; }
.cf-checks li{ display:flex; align-items:center; gap:11px; padding:10px 0; border-top:1px solid rgba(255,255,255,.08); font-size:15.5px; line-height:1.4; color:#ececef; }
.cf-col-a .cf-checks li{ flex-direction:row-reverse; }
.cf-ck{ width:22px; height:22px; border-radius:50%; flex:none; display:grid; place-items:center; background:rgba(60,193,160,.16); color:var(--verde); }
.cf-ck .ico{ width:12px; height:12px; stroke-width:2.8; }
.cf-cerebro{ position:relative; width:520px; aspect-ratio:520 / 420; }
.cf-fondo{ position:absolute; z-index:0; inset:-28% -24%; pointer-events:none;
  background:radial-gradient(circle, rgba(255,255,255,.075) 1.5px, transparent 1.6px) 0 0 / 18px 18px;
  -webkit-mask-image:radial-gradient(closest-side, #000 25%, transparent 100%); mask-image:radial-gradient(closest-side, #000 25%, transparent 100%); }
.cf-fondo::after{ content:''; position:absolute; inset:0; background:radial-gradient(closest-side, rgba(60,193,160,.22), rgba(60,193,160,.06) 55%, transparent 80%); }
.cf-red{ position:absolute; z-index:1; left:-30%; top:-30%; width:160%; height:160%; pointer-events:none; }
.cf-contorno{ position:relative; z-index:2; display:block; width:100%; height:100%; overflow:visible; }
.cf-contorno path{ fill:none; stroke:rgba(255,255,255,.15); stroke-width:1.3; stroke-linecap:round; stroke-linejoin:round; vector-effect:non-scaling-stroke; }
.cf-contorno .cf-c-sil{ stroke:rgba(255,255,255,.22); }

/* 03 · su razonamiento */
.cf-razona{ padding:18px; border-radius:18px; background:#0d0d0f; border:1px solid rgba(255,255,255,.09); box-shadow:0 30px 80px -40px rgba(60,193,160,.25); }
.cf-tarea{ display:flex; gap:12px; padding:12px 14px; border-radius:12px; background:#17171a; font-size:14.5px; line-height:1.45; color:#ececef; }
.cf-tarea b{ display:block; margin-bottom:2px; font-size:12px; font-weight:500; color:rgba(255,255,255,.5); }
.cf-razona-cab{ display:flex; align-items:center; gap:8px; margin:18px 0 6px !important; font-size:11px; font-weight:600; letter-spacing:.1em; text-transform:uppercase; color:var(--verde); }
.cf-luz{ width:7px; height:7px; border-radius:50%; background:var(--verde); box-shadow:0 0 10px var(--verde); animation:cfLate 1.2s ease-in-out infinite; }
@keyframes cfLate{ 50%{ opacity:.35; } }
.cf-pasos-r li{ display:flex; align-items:center; justify-content:space-between; gap:16px; padding:11px 0; border-top:1px dashed rgba(255,255,255,.09); font-size:14.5px; line-height:1.45; color:#d9d9de; }
.cf-pasos-r em{ flex:none; padding:3px 9px; border-radius:999px; border:1px solid rgba(255,255,255,.12); font-style:normal; font-size:11px; font-weight:500; color:rgba(255,255,255,.55); white-space:nowrap; }
.cf-pasos-r .cf-plan{ color:#fff; font-weight:500; }
.cf-pasos-r .cf-plan em{ border-color:transparent; background:var(--verde); color:var(--tinta); }

/* 04 · lo hace, y te avisa */
.cf-hace{ display:flex; flex-direction:column; gap:18px; }
.cf-acciones{ display:grid; grid-template-columns:repeat(auto-fill, minmax(210px, 1fr)); gap:10px; }
.cf-acciones li{ display:grid; grid-template-columns:30px minmax(0, 1fr); column-gap:12px; row-gap:1px; align-items:center; padding:14px; border-radius:14px; background:#0f0f11; border:1px solid rgba(255,255,255,.09); }
.cf-acciones .cf-ico{ grid-row:1 / span 2; }
.cf-acciones b{ font-size:15px; font-weight:500; }
.cf-acciones em{ font-style:normal; font-size:13px; color:rgba(255,255,255,.5); }
.cf-acciones .cf-en-app{ border-color:rgba(60,193,160,.35); }
.cf-aviso{ align-self:flex-start; max-width:440px; padding:14px 16px 15px; border-radius:14px; background:#fff; color:var(--tinta); box-shadow:0 24px 60px -24px rgba(0,0,0,.9); }
.cf-aviso-cab{ display:flex; align-items:center; gap:9px; font-size:12.5px; font-weight:600; }
.cf-aviso-cab time{ margin-left:auto; font-size:11px; font-weight:400; color:var(--tinta-45); }
.cf-aviso-ico{ width:26px; height:26px; border-radius:50%; display:grid; place-items:center; background:var(--verde-agua); color:var(--verde-osc); }
.cf-aviso-ico .ico{ width:14px; height:14px; }
.cf-aviso p{ margin-top:8px !important; font-size:14px; line-height:1.45; color:var(--tinta-80); }
.cf-aviso p b{ font-weight:600; color:var(--tinta); }
.cf-aviso-btns{ display:flex; gap:8px; margin-top:12px; }
.cf-aviso-btns i{ font-style:normal; font-size:12.5px; font-weight:500; padding:6px 13px; border-radius:999px; background:var(--nieve-2); color:var(--tinta-80); }
.cf-aviso-btns i:first-child{ background:var(--tinta); color:#fff; }

/* ---------- Entradas (con JS y sin movimiento reducido) ---------- */
.s-como.anima .ent{ opacity:0; transform:translateY(16px); transition:opacity .6s var(--e), transform .6s var(--e); transition-delay:var(--d, 0ms); }
.s-como.anima .ent.dentro{ opacity:1; transform:none; }
/* el cerebro se dibuja trazo a trazo */
.s-como.anima .cf-contorno path{ stroke-dasharray:1; stroke-dashoffset:1; transition:stroke-dashoffset 2.4s cubic-bezier(.45,0,.2,1); }
.s-como.anima .cf-saber.dentro .cf-contorno path{ stroke-dashoffset:0; }
.s-como.anima .cf-saber.dentro .cf-contorno path:nth-child(n+2){ transition-delay:.5s; }
.s-como.anima .cf-saber.dentro .cf-contorno path:nth-child(n+7){ transition-delay:.9s; }
.s-como.anima .cf-saber.dentro .cf-contorno path:nth-child(n+12){ transition-delay:1.3s; }
.s-como.anima .cf-cerebro .cf-fondo, .s-como.anima .cf-cerebro .cf-red{ opacity:0; transition:opacity 1.6s ease; }
.s-como.anima .cf-saber.dentro .cf-fondo, .s-como.anima .cf-saber.dentro .cf-red{ opacity:1; }
/* lo que repasa: cada punto se marca uno detrás de otro */
.s-como.anima .cf-checks li{ opacity:.22; transition:opacity .5s; transition-delay:calc(700ms + var(--i) * 260ms); }
.s-como.anima .cf-saber.dentro .cf-checks li{ opacity:1; }
.s-como.anima .cf-checks .cf-ck{ transform:scale(.4); opacity:0; transition:transform .4s var(--e), opacity .3s; transition-delay:calc(700ms + var(--i) * 260ms); }
.s-como.anima .cf-saber.dentro .cf-checks .cf-ck{ transform:none; opacity:1; }
/* el razonamiento, línea a línea */
.s-como.anima .cf-pasos-r li{ opacity:0; transform:translateY(6px); transition:opacity .45s var(--e), transform .45s var(--e); transition-delay:calc(500ms + var(--i) * 480ms); }
.s-como.anima .cf-razona.dentro .cf-pasos-r li{ opacity:1; transform:none; }

/* ---------- Móvil ---------- */
@media (max-width:1180px){
  .cf-saber{ grid-template-columns:minmax(0, 1fr) 420px minmax(0, 1fr); }
  .cf-cerebro{ width:420px; }
}
@media (max-width:899.98px){
  .s-como{ padding-bottom:104px; }
  .cf-cab{ padding-top:88px; }
  .cf-linea-w{ margin-top:64px; }
  .cf-linea{ gap:88px; padding-left:56px !important; }
  .cf-paso{ grid-template-columns:1fr; gap:22px; }
  .cf-nodo{ left:-56px; top:-4px; width:40px; height:40px; }
  .cf-n{ font-size:12px; }
  .cf-ok .ico{ width:18px; height:18px; }
  .cf-txt p{ font-size:16px; }
  .cf-tags{ padding-top:0 !important; gap:8px; }
  .cf-tags li{ font-size:13.5px; padding:6px 13px 6px 6px; }
  .cf-saber{ grid-template-columns:1fr; gap:22px; margin-top:18px; }
  .cf-cerebro{ order:-1; width:100%; max-width:360px; margin-inline:auto; }
  .cf-col-a{ text-align:left; }
  .cf-col-a .cf-checks li{ flex-direction:row; }
  .cf-pasos-r li{ flex-direction:column; align-items:flex-start; gap:6px; }
  .cf-acciones{ grid-template-columns:1fr; }
}

/* 05-10 (dueño): sin contornos; solo las neuronas y, en el centro, «Revisa – Piensa – Hace» (cada palabra se enciende por turnos) */
.cf-centro{ position:relative; z-index:2; width:100%; height:100%; display:grid; place-items:center; }
.cf-rph{ display:inline-flex; align-items:center; gap:12px; padding:12px 22px; border-radius:999px; background:rgba(0,0,0,.74); border:1px solid rgba(60,193,160,.38);
  box-shadow:0 0 34px rgba(60,193,160,.28); font-size:15px; font-weight:600; letter-spacing:.14em; text-transform:uppercase; color:rgba(214,255,242,.55); white-space:nowrap; }
.cf-rph i{ font-style:normal; color:rgba(60,193,160,.6); }
.cf-rph b{ font-weight:600; animation:cfPalabra 3.6s ease-in-out infinite; }
.cf-rph b:nth-of-type(2){ animation-delay:1.2s; } .cf-rph b:nth-of-type(3){ animation-delay:2.4s; }
@keyframes cfPalabra{ 0%, 40%, 100%{ color:rgba(214,255,242,.55); text-shadow:none; } 12%, 28%{ color:#fff; text-shadow:0 0 14px rgba(60,193,160,.9); } }
@media (max-width:899.98px){ .cf-rph{ font-size:12.5px; gap:9px; padding:10px 16px; } }