/* ============ Clerk Digital · sitio web ============
   Claro por defecto (oscuro con el botón de la luna o si el sistema lo pide), títulos con serif,
   azul de Vuelto como acento. Animaciones: cambio de página con fundido, aparición al bajar,
   pantalla del programa en 3D y avisos flotantes. */
:root {
  --fondo: #fbfaf8; --fondo-2: #ffffff; --tinte: #f3f1ed; --borde: #e7e3dc; --tinta: #16130f; --suave: #6b655d;
  --acento: #0b5cad; --acento-2: #1d74d1; --acento-tenue: rgba(11, 92, 173, .08); --acento-borde: rgba(11, 92, 173, .28);
  --verde: #14883e; --amarillo: #c77700; --wa: #1fa855;
  --sombra: 0 1px 2px rgba(22, 19, 15, .04), 0 12px 32px rgba(22, 19, 15, .08);
  --sombra-grande: 0 40px 80px -20px rgba(11, 45, 90, .35), 0 0 0 1px rgba(22, 19, 15, .04);
  --radio: 16px;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root:not([data-tema="claro"]) { --fondo: #12100e; --fondo-2: #1a1714; --tinte: #17151a; --borde: #2b2622; --tinta: #f4f1ec; --suave: #a8a29a; --acento: #5aa6f2; --acento-2: #7db8f5; --acento-tenue: rgba(90, 166, 242, .1); --acento-borde: rgba(90, 166, 242, .35); --sombra: 0 1px 2px rgba(0,0,0,.3), 0 12px 32px rgba(0,0,0,.35); --sombra-grande: 0 40px 80px -20px rgba(0,0,0,.7); color-scheme: dark; } }
:root[data-tema="oscuro"] { --fondo: #12100e; --fondo-2: #1a1714; --tinte: #17151a; --borde: #2b2622; --tinta: #f4f1ec; --suave: #a8a29a; --acento: #5aa6f2; --acento-2: #7db8f5; --acento-tenue: rgba(90, 166, 242, .1); --acento-borde: rgba(90, 166, 242, .35); --sombra: 0 1px 2px rgba(0,0,0,.3), 0 12px 32px rgba(0,0,0,.35); --sombra-grande: 0 40px 80px -20px rgba(0,0,0,.7); color-scheme: dark; }

/* cambio de página con fundido (navegadores que lo soportan) */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: 260ms ease both salir; }
::view-transition-new(root) { animation: 360ms ease both entrar; }
@keyframes salir { to { opacity: 0; transform: translateY(-6px); } }
@keyframes entrar { from { opacity: 0; transform: translateY(8px); } }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; }
body { overflow-x: clip; }
body { margin: 0; background: var(--fondo); color: var(--tinta); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; transition: background .3s, color .3s; }
img, video { max-width: 100%; display: block; }
a { color: var(--acento); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.12; letter-spacing: -.02em; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 1em; }
.contenedor { width: min(1180px, 100% - 32px); margin-inline: auto; }
.angosto { width: min(820px, 100% - 32px); margin-inline: auto; }
.centro { text-align: center; }
.suave { color: var(--suave); }
.saltar { position: absolute; left: -999px; top: 8px; background: var(--acento); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.saltar:focus { left: 8px; }
:focus-visible { outline: 3px solid #f2b84b; outline-offset: 3px; border-radius: 4px; }

/* barra de progreso al bajar */
.progreso { position: fixed; top: 0; left: 0; height: 3px; width: 100%; transform-origin: 0 50%; transform: scaleX(0); background: linear-gradient(90deg, var(--acento), var(--verde)); z-index: 60; }

/* ---------- barra de arriba ---------- */
.barra { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--fondo) 82%, transparent); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color .3s, box-shadow .3s; }
.barra.con-sombra { border-bottom-color: var(--borde); box-shadow: 0 6px 24px -18px rgba(0, 0, 0, .35); }
.barra-in { display: flex; align-items: center; gap: 20px; height: 68px; }
.marca { display: flex; align-items: center; gap: 9px; font-weight: 750; font-size: 1.2rem; color: var(--tinta); }
.marca:hover { text-decoration: none; }
.marca img { display: block; width: 32px; height: 32px; transition: transform .4s cubic-bezier(.3, 1.6, .5, 1); }
.marca:hover img { transform: rotate(-8deg) scale(1.06); }
.menu { display: flex; gap: 4px; margin-left: auto; }
.menu a { position: relative; color: var(--suave); font-weight: 500; font-size: .95rem; padding: 8px 12px; border-radius: 8px; }
.menu a:hover { color: var(--tinta); text-decoration: none; background: var(--tinte); }
.menu a[aria-current="page"] { color: var(--tinta); background: var(--tinte); }
.acciones-barra { display: flex; align-items: center; gap: 8px; }
.icono-boton { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--borde); background: var(--fondo-2); color: var(--tinta); cursor: pointer; }
.icono-boton:hover { background: var(--tinte); }
.icono-boton svg { width: 18px; height: 18px; }
.solo-celular { display: none; }

/* ---------- botones ---------- */
.boton { position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--acento); color: #fff; font-weight: 600; border-radius: 10px; padding: 11px 20px; border: 1px solid var(--acento); cursor: pointer; font: 600 .97rem var(--sans); overflow: hidden; transition: transform .2s, box-shadow .2s, background .2s; }
.boton:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 10px 24px -10px var(--acento); }
.boton::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, .25) 50%, transparent 70%); transform: translateX(-120%); transition: transform .7s; }
.boton:hover::after { transform: translateX(120%); }
.boton .flecha { transition: transform .2s; }
.boton:hover .flecha { transform: translateX(3px); }
.boton-chico { padding: 8px 14px; font-size: .9rem; }
.boton-grande { padding: 15px 28px; font-size: 1.05rem; }
.boton-claro { background: var(--fondo-2); color: var(--tinta); border-color: var(--borde); }
.boton-claro:hover { background: var(--tinte); box-shadow: var(--sombra); }
.acciones { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.acciones.centro { justify-content: center; }

/* ---------- portada ---------- */
.portada { position: relative; overflow: hidden; padding: 84px 0 40px; }
.portada::before { content: ""; position: absolute; inset: -30% -20% auto; height: 760px; background: radial-gradient(ellipse 60% 55% at 70% 25%, rgba(29, 116, 209, .18), transparent 70%), radial-gradient(ellipse 40% 40% at 15% 10%, rgba(20, 136, 62, .08), transparent 70%); pointer-events: none; z-index: -1; }
.pastilla { display: inline-flex; align-items: center; gap: 10px; border: 1px solid var(--borde); background: var(--fondo-2); border-radius: 999px; padding: 6px 16px; color: var(--acento); font-weight: 650; font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; box-shadow: var(--sombra); }
.pastilla i { width: 7px; height: 7px; border-radius: 50%; background: var(--acento); animation: latido 2s infinite; }
@keyframes latido { 0%, 100% { box-shadow: 0 0 0 0 rgba(29, 116, 209, .5); } 50% { box-shadow: 0 0 0 6px rgba(29, 116, 209, 0); } }
h1 { font-family: var(--serif); font-weight: 500; font-size: clamp(3rem, 8.5vw, 6.6rem); letter-spacing: -.035em; line-height: .98; margin: 26px 0 22px; }
h1 em, .grande em, .titulo-serif em { font-style: italic; color: var(--acento); }
.bajada { color: var(--suave); font-size: clamp(1.05rem, 2vw, 1.25rem); max-width: 38em; margin-inline: auto; }
.letras span { display: inline-block; opacity: 0; transform: translateY(.4em); animation: subir .7s cubic-bezier(.2, .7, .2, 1) forwards; }
@keyframes subir { to { opacity: 1; transform: none; } }

.escena { perspective: 1600px; margin-top: 34px; }
.pantalla-3d { position: relative; width: min(1040px, 100%); margin-inline: auto; transform: rotateX(14deg) scale(.96); transform-origin: 50% 0; transition: transform .2s linear; will-change: transform; }
.pantalla-3d .marco { border-radius: 16px; overflow: hidden; border: 1px solid var(--borde); box-shadow: var(--sombra-grande); background: #fff; }
.pantalla-3d video, .pantalla-3d img { width: 100%; aspect-ratio: 1280 / 800; object-fit: cover; }
.aviso { position: absolute; display: flex; gap: 12px; align-items: center; text-align: left; background: color-mix(in srgb, var(--fondo-2) 94%, transparent); border: 1px solid var(--borde); border-radius: 14px; padding: 12px 16px; box-shadow: var(--sombra); backdrop-filter: blur(8px); font-size: .9rem; min-width: 230px; opacity: 0; transform: translateY(12px) scale(.96); transition: opacity .5s, transform .5s cubic-bezier(.2, .9, .3, 1.2); }
.aviso.visible { opacity: 1; transform: none; }
.aviso .ico { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: var(--acento-tenue); color: var(--acento); font-size: 1rem; flex: none; }
.aviso b { display: block; } .aviso small { color: var(--suave); }
.aviso-1 { left: -36px; bottom: 16%; } .aviso-2 { right: -30px; top: 12%; } .aviso-3 { right: 6%; bottom: -22px; }
.chips { list-style: none; padding: 0; margin: 40px 0 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.chips li { border: 1px solid var(--borde); background: var(--fondo-2); border-radius: 999px; padding: 6px 14px; color: var(--suave); font-size: .9rem; }
.chips li::before { content: "✓ "; color: var(--verde); font-weight: 700; }

/* cinta que se mueve sola */
.cinta { overflow: hidden; border-block: 1px solid var(--borde); background: var(--fondo-2); padding: 18px 0; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.cinta-in { display: flex; gap: 48px; width: max-content; animation: correr 38s linear infinite; }
.cinta-in span { color: var(--suave); font-weight: 600; white-space: nowrap; }
.cinta-in span::before { content: "◆"; color: var(--acento); margin-right: 14px; font-size: .7rem; vertical-align: middle; }
@keyframes correr { to { transform: translateX(-50%); } }

/* ---------- secciones ---------- */
.seccion { padding: 100px 0; }
.seccion.tinte { background: var(--tinte); }
.seccion.borde { border-top: 1px solid var(--borde); }
.ceja { color: var(--acento); font-weight: 650; font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; }
.intro { color: var(--suave); max-width: 46em; font-size: 1.07rem; }
.titulo-serif { font-family: var(--serif); font-weight: 500; font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -.03em; }

/* aparecer al bajar */
.aparece { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .8s cubic-bezier(.2, .7, .2, 1); transition-delay: var(--retraso, 0s); }
.aparece.visible { opacity: 1; transform: none; }
.aparece.izq { transform: translateX(-30px); } .aparece.der { transform: translateX(30px); }
.aparece.izq.visible, .aparece.der.visible { transform: none; }

.tarjeta { background: var(--fondo-2); border: 1px solid var(--borde); border-radius: var(--radio); padding: 26px; transition: transform .3s, box-shadow .3s, border-color .3s; }
.tarjeta:hover { transform: translateY(-3px); box-shadow: var(--sombra); border-color: var(--acento-borde); }
.tarjeta p { color: var(--suave); margin: 0; }
.rejilla { display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
.rejilla.dos { grid-template-columns: repeat(2, 1fr); } .rejilla.cuatro { grid-template-columns: repeat(4, 1fr); }
.icono { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--acento-tenue); color: var(--acento); font-size: 1.3rem; margin-bottom: 16px; }

/* comparación */
.tabla-vs { margin-top: 40px; border: 1px solid var(--borde); border-radius: var(--radio); overflow: hidden; background: var(--fondo-2); box-shadow: var(--sombra); }
.fila { display: grid; grid-template-columns: 1.1fr 1fr 1fr 1.35fr; border-top: 1px solid var(--borde); }
.fila:first-child { border-top: 0; }
.fila > * { padding: 18px 20px; }
.fila span { color: var(--suave); }
.cabeza span { font-weight: 650; color: var(--tinta); font-size: .9rem; }
.fila .nuestra { background: var(--acento-tenue); color: var(--tinta); position: relative; }
.fila .nuestra::before { content: "✓"; color: var(--acento); font-weight: 700; margin-right: 8px; }
.cabeza .nuestra { background: var(--acento); color: #fff; } .cabeza .nuestra::before { content: none; }

/* pasos */
.pasos { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: paso; }
.pasos li { counter-increment: paso; position: relative; }
.pasos li::before { content: counter(paso); display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: var(--acento); color: #fff; font-weight: 750; margin-bottom: 18px; box-shadow: 0 8px 20px -8px var(--acento); }
.pasos li:not(:last-child)::after { content: ""; position: absolute; top: 21px; left: 58px; right: -10px; height: 2px; background: repeating-linear-gradient(90deg, var(--borde) 0 8px, transparent 8px 14px); }
.pasos p { color: var(--suave); }

/* funciones alternadas */
.funcion { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; padding: 70px 0; }
.funcion:nth-child(even) .medio { order: 2; }
.funcion .medio { position: relative; }
.funcion .medio .marco { border-radius: 14px; overflow: hidden; border: 1px solid var(--borde); box-shadow: var(--sombra-grande); background: #fff; transform: perspective(1400px) rotateY(var(--giro, -6deg)); transition: transform .6s; }
.funcion:nth-child(even) .medio .marco { --giro: 6deg; }
.funcion .medio:hover .marco { transform: perspective(1400px) rotateY(0); }
.funcion .numero { font-family: var(--serif); font-style: italic; color: var(--acento); font-size: 1.4rem; }
.checks { list-style: none; padding: 0; margin: 18px 0 0; }
.checks li { position: relative; padding: 6px 0 6px 28px; color: var(--suave); }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 6px; color: var(--verde); font-weight: 800; }
.checks b { color: var(--tinta); font-weight: 600; }
.puntitos { display: flex; gap: 6px; justify-content: center; margin-top: 14px; }
.puntitos button { width: 8px; height: 8px; border-radius: 99px; border: 0; background: var(--borde); padding: 0; cursor: pointer; transition: width .3s, background .3s; }
.puntitos button[aria-current="true"] { width: 22px; background: var(--acento); }
.carrusel { position: relative; aspect-ratio: 1280 / 800; }
.carrusel img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .7s; }
.carrusel img.activa { opacity: 1; }

/* números grandes */
.numeros { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.numeros b { display: block; font-family: var(--serif); font-weight: 500; font-size: clamp(2.2rem, 4vw, 3.2rem); color: var(--tinta); letter-spacing: -.03em; }
.numeros span { color: var(--suave); font-size: .95rem; }

/* precios */
.selector { display: inline-flex; padding: 4px; border-radius: 12px; background: var(--fondo-2); border: 1px solid var(--borde); margin: 10px 0 30px; }
.selector button { border: 0; background: none; padding: 9px 18px; border-radius: 9px; font: 600 .95rem var(--sans); color: var(--suave); cursor: pointer; transition: background .25s, color .25s; }
.selector button[aria-pressed="true"] { background: var(--acento); color: #fff; }
.selector small { color: var(--verde); font-weight: 700; margin-left: 6px; }
.selector button[aria-pressed="true"] small { color: #d9ffe6; }
.planes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.plan { position: relative; display: flex; flex-direction: column; text-align: left; }
.plan.destacada { border: 2px solid var(--acento); box-shadow: 0 30px 60px -30px var(--acento); }
.plan .sello { position: absolute; top: -13px; left: 26px; background: var(--acento); color: #fff; font-size: .75rem; font-weight: 700; border-radius: 999px; padding: 3px 12px; }
.precio { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 8px; margin: 6px 0 4px; }
.precio b { font-family: var(--serif); font-weight: 500; font-size: clamp(2.3rem, 4vw, 3rem); white-space: nowrap; letter-spacing: -.03em; transition: opacity .25s; }
.precio span { color: var(--suave); }
.plan .checks { flex: 1; margin-bottom: 20px; }
.tabla { width: 100%; border-collapse: collapse; background: var(--fondo-2); border: 1px solid var(--borde); border-radius: var(--radio); overflow: hidden; }
.tabla th, .tabla td { padding: 14px 18px; border-top: 1px solid var(--borde); text-align: center; }
.tabla th:first-child, .tabla td:first-child { text-align: left; }
.tabla thead th { border-top: 0; background: var(--tinte); font-size: .9rem; }
.tabla .grupo td { background: var(--tinte); font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--acento); font-weight: 700; text-align: left; }
.tabla .si { color: var(--verde); font-weight: 800; } .tabla .no { color: var(--suave); }
.envoltura-tabla { overflow-x: auto; border-radius: var(--radio); }

/* preguntas */
.pregunta { border-bottom: 1px solid var(--borde); }
.pregunta summary { cursor: pointer; list-style: none; padding: 20px 40px 20px 0; position: relative; font-weight: 600; font-size: 1.05rem; }
.pregunta summary::-webkit-details-marker { display: none; }
.pregunta summary::after { content: ""; position: absolute; right: 8px; top: 26px; width: 10px; height: 10px; border-right: 2px solid var(--acento); border-bottom: 2px solid var(--acento); transform: rotate(45deg); transition: transform .3s; }
.pregunta[open] summary::after { transform: rotate(-135deg); top: 30px; }
.pregunta .respuesta { overflow: hidden; color: var(--suave); }
.pregunta .respuesta p { margin: 0 0 20px; }

/* info: menú de la izquierda */
.info { display: grid; grid-template-columns: 230px 1fr; gap: 48px; padding: 56px 0 100px; align-items: start; }
.info nav { position: sticky; top: 92px; }
.info nav .ceja { margin-bottom: 10px; }
.info nav a { display: block; padding: 7px 12px; border-radius: 8px; color: var(--suave); font-size: .95rem; }
.info nav a:hover { background: var(--tinte); color: var(--tinta); text-decoration: none; }
.info nav a[aria-current="page"] { background: var(--tinte); color: var(--tinta); font-weight: 600; }
.info h1 { font-family: var(--sans); font-weight: 750; font-size: clamp(2rem, 4vw, 2.8rem); letter-spacing: -.025em; margin: 0 0 14px; line-height: 1.1; }
.enlace-tarjeta { display: block; color: inherit; }
.enlace-tarjeta:hover { text-decoration: none; }
.enlace-tarjeta h3::after { content: " →"; color: var(--acento); transition: margin .2s; }
.enlace-tarjeta:hover h3::after { margin-left: 4px; }
.lista-tarjetas { display: grid; gap: 14px; }
.doc h2 { font-size: 1.6rem; margin-top: 2em; } .doc h3 { margin-top: 1.6em; }
.doc ul, .doc ol { padding-left: 1.3em; color: var(--suave); } .doc li { margin: .3em 0; } .doc b, .doc strong { color: var(--tinta); }
.doc table { width: 100%; border-collapse: collapse; margin: 1em 0 1.6em; font-size: .95rem; } .doc th, .doc td { border: 1px solid var(--borde); padding: 8px 12px; text-align: left; } .doc th { background: var(--tinte); }
.doc code { background: var(--tinte); padding: 2px 6px; border-radius: 6px; font-size: .9em; }
.doc hr { border: 0; border-top: 1px solid var(--borde); margin: 2em 0; }

/* videos */
.videos { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.video { padding: 0; overflow: hidden; }
.video .cubierta { position: relative; aspect-ratio: 1280 / 800; background: #0e1116 center / cover; cursor: pointer; }
.video .cubierta video { width: 100%; height: 100%; object-fit: cover; }
.video .play { position: absolute; inset: 0; margin: auto; width: 64px; height: 64px; border-radius: 50%; background: var(--acento); color: #fff; display: grid; place-items: center; border: 0; font-size: 1.4rem; box-shadow: 0 10px 30px rgba(0, 0, 0, .35); transition: transform .25s; cursor: pointer; }
.video .cubierta:hover .play { transform: scale(1.08); }
.video .texto { padding: 18px 20px; }
.video .texto p { margin: 0; color: var(--suave); font-size: .95rem; }
.duracion { position: absolute; right: 10px; bottom: 10px; background: rgba(0, 0, 0, .7); color: #fff; font-size: .78rem; padding: 2px 8px; border-radius: 6px; }

/* formulario */
.campo { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.campo label { font-weight: 600; font-size: .92rem; }
.campo input, .campo textarea, .campo select { font: inherit; color: inherit; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--borde); background: var(--fondo-2); transition: border-color .2s, box-shadow .2s; }
.campo input:focus, .campo textarea:focus, .campo select:focus { outline: none; border-color: var(--acento); box-shadow: 0 0 0 4px var(--acento-tenue); }
.campo textarea { min-height: 130px; resize: vertical; }
.dos-campos { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.franja { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; border: 1px solid var(--borde); border-radius: var(--radio); background: var(--fondo-2); }
.franja p { margin: 0; color: var(--suave); }

/* cierre */
.final { position: relative; overflow: hidden; text-align: center; padding: 120px 0; border-top: 1px solid var(--borde); }
.final::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse 50% 60% at 50% 100%, rgba(29, 116, 209, .16), transparent 70%); z-index: -1; }
.grande { font-family: var(--serif); font-weight: 500; font-size: clamp(2.4rem, 6vw, 4.6rem); letter-spacing: -.035em; max-width: 13em; margin-inline: auto; }

/* pie */
.pie { border-top: 1px solid var(--borde); padding: 56px 0 26px; color: var(--suave); font-size: .93rem; background: var(--fondo-2); }
.pie-in { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.pie h4 { color: var(--tinta); font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px; }
.pie a { display: block; color: var(--suave); padding: 3px 0; }
.pie a:hover { color: var(--tinta); }
.derechos { border-top: 1px solid var(--borde); margin-top: 36px; padding-top: 20px; font-size: .85rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* botón flotante */
.dudas { position: fixed; right: 18px; bottom: 18px; z-index: 40; display: inline-flex; align-items: center; gap: 8px; background: var(--acento); color: #fff; font-weight: 700; padding: 13px 20px; border-radius: 999px; box-shadow: 0 12px 30px -8px rgba(0, 0, 0, .45); transform: translateY(100px); transition: transform .5s cubic-bezier(.2, .9, .3, 1.3); }
.dudas.visible { transform: none; }
.dudas:hover { text-decoration: none; background: var(--acento-2); }

.dos-columnas { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }

/* celular */
.menu-celular { display: none; }
@media (max-width: 980px) {
  .menu { display: none; }
  .solo-celular { display: grid; }
  .menu-celular { position: fixed; inset: 68px 0 auto; z-index: 49; display: flex; flex-direction: column; gap: 4px; padding: 16px; background: var(--fondo-2); border-bottom: 1px solid var(--borde); box-shadow: var(--sombra); transform: translateY(-120%); transition: transform .35s cubic-bezier(.2, .8, .2, 1); }
  .menu-celular.abierto { transform: none; }
  .menu-celular a { padding: 12px; border-radius: 10px; color: var(--tinta); font-weight: 600; }
  .barra-in .boton { display: none; }
  .rejilla, .rejilla.dos, .rejilla.cuatro, .pasos, .planes, .numeros, .videos, .pie-in { grid-template-columns: 1fr; }
  .numeros { grid-template-columns: 1fr 1fr; }
  .pasos li::after { display: none; }
  .funcion { grid-template-columns: 1fr; gap: 28px; padding: 44px 0; }
  .funcion:nth-child(even) .medio { order: 0; }
  .info { grid-template-columns: 1fr; gap: 20px; padding-top: 24px; }
  .info nav { position: static; display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; }
  .info nav .ceja { display: none; }
  .info nav a { white-space: nowrap; border: 1px solid var(--borde); }
  .aviso { display: none; }
  .tabla-vs { border: 0; box-shadow: none; background: none; }
  .fila { grid-template-columns: 1fr; border: 1px solid var(--borde); border-radius: 12px; margin-bottom: 12px; background: var(--fondo-2); }
  .fila > * { padding: 8px 16px; }
  .cabeza { display: none; }
  .fila span::before { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--suave); }
  .fila span:nth-of-type(1)::before { content: "Cuaderno y calculadora"; }
  .fila span:nth-of-type(2)::before { content: "Programa común"; }
  .fila .nuestra::before { content: "Vuelto"; color: var(--acento); margin: 0; }
  .dos-campos, .dos-columnas { grid-template-columns: 1fr; }
  .seccion { padding: 64px 0; }
  .portada { padding-top: 48px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .aparece, .letras span { opacity: 1; transform: none; }
  .pantalla-3d { transform: none; }
}

/* ventana de video */
.ventana-video { border: 0; padding: 0; border-radius: 16px; width: min(1040px, 94vw); background: #000; overflow: hidden; box-shadow: 0 40px 120px rgba(0, 0, 0, .6); }
.ventana-video::backdrop { background: rgba(8, 10, 14, .72); backdrop-filter: blur(6px); }
.ventana-video[open] { animation: aparecerVentana .35s cubic-bezier(.2, .9, .3, 1.1); }
@keyframes aparecerVentana { from { opacity: 0; transform: scale(.94); } }
.ventana-video video { width: 100%; aspect-ratio: 1280 / 800; }
.cerrar-video { position: absolute; right: 12px; top: 12px; z-index: 2; background: rgba(255, 255, 255, .9); color: #111; }
.chips a { color: inherit; }
.pie a.con-icono { display: flex; align-items: center; gap: 8px; word-break: break-all; }
.pie a.con-icono .ico { flex: none; }
.pie a.marca { display: flex; color: var(--tinta); }
.aviso-form { margin: 14px 0 0; padding: 12px 14px; border-radius: 12px; font-weight: 600; font-size: .95rem; }
.aviso-form.ok { background: rgba(34,197,94,.12); color: #15803d; }
.aviso-form.mal { background: rgba(239,68,68,.1); color: #b91c1c; }