/* ===== TuQRGratis · estilos (pensado primero para celular) ===== */
:root{
  --tinta:#14161a;
  --tinta-suave:#4a4f59;
  --linea:#e3e5e8;
  --fondo:#f6f6f3;
  --tarjeta:#ffffff;
  --acento:#c8f03c;      /* verde lima de marca */
  --acento-osc:#3d5200;
  --alerta:#9a3412;
  --alerta-fondo:#fff4ed;
  --radio:16px;
  --sombra:0 1px 2px rgba(0,0,0,.05),0 8px 24px rgba(0,0,0,.06);
  --fuente:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--fuente);color:var(--tinta);background:var(--fondo);line-height:1.6;font-size:16px}
img,svg,canvas{max-width:100%}
a{color:var(--tinta);text-underline-offset:3px}
a:hover{color:var(--acento-osc)}
.contenedor{max-width:1040px;margin:0 auto;padding:0 16px}

/* Encabezado */
.cabecera{background:var(--tinta);color:#fff}
.cabecera .contenedor{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-weight:800;font-size:1.2rem;letter-spacing:-.02em}
.logo:hover{color:#fff}
.logo-marca{width:28px;height:28px;border-radius:7px;background:var(--acento);display:grid;place-items:center}
.logo b{color:var(--acento)}
.menu{display:flex;gap:4px;flex-wrap:wrap}
.menu a{color:#d7dae0;text-decoration:none;font-size:.92rem;padding:6px 10px;border-radius:8px}
.menu a:hover,.menu a[aria-current="page"]{color:#fff;background:rgba(255,255,255,.1)}

/* Portada */
.portada{background:var(--tinta);color:#fff;padding:20px 0 84px}
.portada h1{font-size:clamp(1.8rem,6vw,2.8rem);line-height:1.1;margin:0 0 10px;letter-spacing:-.03em}
.portada h1 span{color:var(--acento)}
.portada p{color:#c9ccd3;margin:0;max-width:620px}
.sellos{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;padding:0;list-style:none}
.sellos li{font-size:.82rem;border:1px solid #3a3e47;border-radius:999px;padding:3px 10px;color:#e6e8ec}

/* Herramienta */
.herramienta{margin-top:-64px;background:var(--tarjeta);border-radius:var(--radio);box-shadow:var(--sombra);overflow:hidden}
.pestanas{display:flex;gap:6px;overflow-x:auto;padding:12px;border-bottom:1px solid var(--linea);scrollbar-width:none}
.pestanas::-webkit-scrollbar{display:none}
.pestana{flex:0 0 auto;border:1px solid var(--linea);background:#fff;color:var(--tinta);font:inherit;font-weight:600;font-size:.92rem;padding:8px 14px;border-radius:999px;cursor:pointer;display:flex;align-items:center;gap:6px}
.pestana[aria-selected="true"]{background:var(--tinta);color:#fff;border-color:var(--tinta)}
.pestana:focus-visible,.boton:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--acento);outline-offset:2px}

.cuerpo-herramienta{display:grid;gap:0}
.formulario{padding:16px}
.panel[hidden]{display:none}
.campo{margin-bottom:14px}
.campo label,.etiqueta{display:block;font-weight:600;font-size:.9rem;margin-bottom:5px}
.campo small{display:block;color:var(--tinta-suave);font-size:.8rem;margin-top:4px}
input[type=text],input[type=url],input[type=tel],input[type=email],input[type=password],select,textarea{width:100%;font:inherit;font-size:16px;padding:11px 12px;border:1px solid #cfd3d9;border-radius:10px;background:#fff;color:var(--tinta)}
textarea{min-height:110px;resize:vertical}
.fila{display:grid;gap:12px;grid-template-columns:1fr 1fr}
.fila-tel{display:grid;gap:8px;grid-template-columns:120px 1fr}
.casilla{display:flex;align-items:center;gap:8px;font-size:.92rem}
.casilla input{width:18px;height:18px}
.contador{text-align:right}

/* Vista previa */
.vista{background:#fafaf8;border-top:1px solid var(--linea);padding:16px;display:flex;flex-direction:column;align-items:center;gap:14px}
.marco-qr{width:100%;max-width:280px;aspect-ratio:1;border-radius:12px;background:#fff;border:1px solid var(--linea);display:grid;place-items:center;overflow:hidden;position:relative}
.marco-qr img{width:100%;height:100%;image-rendering:pixelated;display:block;-webkit-touch-callout:default}
.marco-qr img[hidden],.marco-qr canvas[hidden]{display:none}
.marco-qr .vacio[hidden]{display:none}
.marco-qr .vacio{position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:24px;color:var(--tinta-suave);font-size:.9rem;background:#fff}
.colores{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;max-width:320px}
.color{display:flex;align-items:center;gap:8px;border:1px solid var(--linea);border-radius:10px;padding:6px 8px;background:#fff;font-size:.85rem;font-weight:600}
.color input{width:36px;height:30px;border:0;padding:0;background:none;cursor:pointer}
.aviso{width:100%;max-width:320px;background:var(--alerta-fondo);color:var(--alerta);border-radius:10px;padding:8px 12px;font-size:.85rem}
.aviso[hidden]{display:none}
.opciones{width:100%;max-width:320px;font-size:.9rem}
.opciones summary{cursor:pointer;font-weight:600;padding:4px 0}
.opciones .campo{margin:10px 0 0}
.botones{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;max-width:320px}
.boton{font:inherit;font-weight:700;border:0;border-radius:12px;padding:13px 10px;cursor:pointer;background:var(--acento);color:var(--tinta)}
.boton.guardar{width:100%;max-width:320px;background:#25d366;color:#0b2a14}
.boton.guardar[hidden],.consejo-movil[hidden]{display:none}
.consejo-movil{font-size:.82rem;color:var(--tinta-suave);text-align:center;max-width:320px;margin:-4px 0 0}
.boton.secundario{background:var(--tinta);color:#fff}
.boton:disabled{opacity:.4;cursor:not-allowed}
.enlace-chico{background:none;border:0;font:inherit;font-size:.85rem;color:var(--tinta-suave);text-decoration:underline;cursor:pointer;padding:0}
.privado{font-size:.8rem;color:var(--tinta-suave);text-align:center;max-width:320px;margin:0}

/* Contenido */
.seccion{padding:36px 0 8px}
.seccion h2{font-size:clamp(1.35rem,4.5vw,1.8rem);letter-spacing:-.02em;line-height:1.2;margin:0 0 12px}
.seccion h3{font-size:1.08rem;margin:0 0 6px}
.seccion p{margin:0 0 12px;color:#2b2f36}
.pasos{list-style:none;padding:0;margin:0;display:grid;gap:12px;counter-reset:paso}
.pasos li{background:#fff;border:1px solid var(--linea);border-radius:var(--radio);padding:14px 14px 14px 56px;position:relative;counter-increment:paso}
.pasos li::before{content:counter(paso);position:absolute;left:14px;top:14px;width:30px;height:30px;border-radius:50%;background:var(--acento);font-weight:800;display:grid;place-items:center}
.rejilla{display:grid;gap:12px}
.ficha{background:#fff;border:1px solid var(--linea);border-radius:var(--radio);padding:16px}
.ficha p{margin:0;font-size:.95rem}
.lista-consejos{padding-left:20px;margin:0}
.lista-consejos li{margin-bottom:8px}
.recuadro{background:#fff;border-left:4px solid var(--acento-osc);border-radius:0 var(--radio) var(--radio) 0;padding:16px;margin:8px 0 12px}
.faq details{background:#fff;border:1px solid var(--linea);border-radius:12px;margin-bottom:8px;padding:0 14px}
.faq summary{cursor:pointer;font-weight:700;padding:13px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 14px}

/* Espacio reservado para anuncios (se activa cuando AdSense apruebe) */
.espacio-anuncio{margin:28px auto 0;max-width:728px;min-height:0}

/* Páginas de texto */
.pagina{background:#fff;border-radius:var(--radio);box-shadow:var(--sombra);padding:22px 18px;margin:24px auto 0;max-width:760px}
.pagina h1{font-size:clamp(1.6rem,5vw,2.2rem);line-height:1.15;letter-spacing:-.02em;margin:0 0 6px}
.pagina h2{font-size:1.2rem;margin:26px 0 8px}
.pagina .fecha{color:var(--tinta-suave);font-size:.88rem;margin:0 0 18px}
.pagina ul{padding-left:20px}

/* Pie */
.pie{margin-top:48px;background:var(--tinta);color:#b9bdc6;padding:28px 0;font-size:.9rem}
.pie nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:12px}
.pie a{color:#fff;text-decoration:none}
.pie a:hover{color:var(--acento)}
.pie p{margin:0 0 6px}

/* Mensaje flotante */
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%) translateY(120px);background:var(--tinta);color:#fff;padding:10px 16px;border-radius:999px;font-size:.9rem;transition:transform .25s;z-index:10}
.toast.visible{transform:translateX(-50%) translateY(0)}

@media (max-width:520px){
  .menu{gap:0}
  .menu a{font-size:.85rem;padding:6px 7px}
  .menu .solo-grande{display:none}
}
/* Pantallas grandes */
@media (min-width:760px){
  .cuerpo-herramienta{grid-template-columns:1.25fr 1fr}
  .formulario{padding:24px}
  .vista{border-top:0;border-left:1px solid var(--linea);padding:24px}
  .rejilla{grid-template-columns:repeat(2,1fr)}
  .pagina{padding:36px 40px}
}
@media (min-width:980px){.rejilla.tres{grid-template-columns:repeat(3,1fr)}}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}