/* Imagen de portada: assets/img/red.jpg
   Foto de Jordan Harrison (@jouwdan) en Unsplash, Licencia Unsplash
   https://unsplash.com/es/fotos/cordon-utp-azul-40XgDxBfYXM */
:root{--tinta:#14212e;--azul:#0d3b5e;--azul-o:#082a44;--cable:#2b7bbf;--led:#f0a500;--fondo:#f2f5f7;--gris:#5a6b7a;--linea:#dde5ec;--claro:#e6f0f8;--sombra:0 12px 32px -14px rgba(13,59,94,.3);--titulos:Bahnschrift,"DIN Alternate","Arial Narrow",system-ui,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5rem}
body{margin:0;font:1.0625rem/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--tinta);background:var(--fondo)}
h1,h2,h3,.marca,.cifra,.correo{font-family:var(--titulos);font-weight:600;line-height:1.15}
h1{font-size:clamp(2.3rem,5.5vw,4.2rem);margin:0 0 1.25rem}
h2{font-size:clamp(1.8rem,3.4vw,2.6rem);margin:0 0 1rem}
h3{font-size:1.2rem;margin:0 0 .5rem}
p{margin:0 0 1rem;max-width:65ch}
a{color:var(--cable)}
:focus-visible{outline:3px solid var(--led);outline-offset:3px}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.contenedor{max-width:74rem;margin:0 auto;padding:0 1.25rem}

/* Cabecera */
.cabecera{position:sticky;top:0;z-index:10;background:var(--azul);transition:background .3s,box-shadow .3s}
.cabecera.fija{background:rgba(8,42,68,.93);backdrop-filter:blur(8px);box-shadow:0 4px 20px rgba(0,0,0,.25)}
.cabecera .contenedor{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1rem;min-height:4.25rem}
.marca{display:flex;align-items:center;gap:.55rem;font-size:1.4rem;color:#fff;text-decoration:none}
.marca::before{content:"";width:.6rem;height:.6rem;border-radius:50%;background:var(--led);box-shadow:0 0 .6rem var(--led);animation:parpadeo 2.4s infinite}
@keyframes parpadeo{50%{opacity:.35}}
#menu ul{list-style:none;display:flex;flex-wrap:wrap;gap:.25rem 1.75rem;margin:0;padding:0}
#menu a{position:relative;display:block;padding-block:.35rem;color:#dbe7f1;text-decoration:none}
#menu a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--led);transform:scaleX(0);transition:transform .25s}
#menu a:hover{color:#fff}
#menu a:hover::after{transform:scaleX(1)}
.menu-btn{display:none;width:2.75rem;height:2.75rem;padding:.65rem;background:none;border:0;cursor:pointer}
.menu-btn span{display:block;height:2px;margin:6px 0;background:#fff;transition:transform .25s,opacity .25s}
.menu-btn[aria-expanded=true] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.menu-btn[aria-expanded=true] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded=true] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* Portada */
.portada{position:relative;overflow:hidden;color:#fff;background:linear-gradient(100deg,rgba(8,42,68,.97) 30%,rgba(13,59,94,.72)),url(../img/red.jpg) center/cover,var(--azul)}
.portada.simple{background:linear-gradient(135deg,var(--azul-o),var(--azul))}
#red{position:absolute;inset:0;width:100%;height:100%}
.portada .contenedor{position:relative;padding-block:clamp(5rem,12vw,9rem)}
.portada.simple .contenedor{padding-block:clamp(3.5rem,8vw,6rem)}
.portada p{font-size:1.2rem;color:#dbe7f1}
.entrada>*{animation:subir .8s both}
.entrada>:nth-child(2){animation-delay:.12s}
.entrada>:nth-child(3){animation-delay:.24s}
.entrada>:nth-child(4){animation-delay:.36s}
@keyframes subir{from{opacity:0;transform:translateY(24px)}}

/* Botones */
.botones{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.75rem}
.boton{display:inline-block;padding:.85rem 1.5rem;border-radius:.4rem;font-weight:600;text-decoration:none;background:var(--led);color:var(--tinta);transition:transform .2s,box-shadow .2s,background .2s}
.boton:hover{background:#ffbc1f;transform:translateY(-2px);box-shadow:0 8px 20px -6px rgba(240,165,0,.6)}
.boton.secundario{background:none;color:inherit;box-shadow:inset 0 0 0 2px currentColor}
.boton.secundario:hover{background:rgba(255,255,255,.1)}

/* Cifras */
.cifras{position:relative;z-index:1;display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));margin-top:-3.5rem;background:#fff;border-radius:.75rem;box-shadow:var(--sombra)}
.cifras div{padding:1.5rem 1.75rem;border-left:1px solid var(--linea)}
.cifras div:first-child{border-left:0}
.cifra{display:block;font-size:2.1rem;color:var(--azul)}
.cifras p{margin:0;color:var(--gris);font-size:.95rem}

/* Secciones */
.seccion{padding-block:clamp(4rem,9vw,6.5rem)}
.blanca{background:#fff}
.cabeza{max-width:44rem;margin-bottom:3rem}
.intro{color:var(--gris);font-size:1.15rem}
.dos{display:grid;gap:3rem;align-items:center}
.foto{display:block;width:100%;height:auto;border-radius:.75rem;box-shadow:var(--sombra)}

/* Tarjetas de servicios */
.tarjetas{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fill,minmax(19rem,1fr))}
.tarjeta{background:#fff;border:1px solid var(--linea);border-radius:.75rem;padding:1.75rem;transition:transform .3s,box-shadow .3s,border-color .3s}
.tarjeta:hover{transform:translateY(-4px);box-shadow:var(--sombra);border-color:transparent}
.tarjeta p,.tarjeta ul{color:var(--gris)}
.tarjeta ul{margin:0;padding-left:1.1rem;font-size:.95rem}
.tarjeta li::marker{color:var(--led)}
.icono{width:2.75rem;height:2.75rem;margin-bottom:1rem;padding:.6rem;border-radius:.6rem;background:var(--claro);color:var(--cable);fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:background .3s,color .3s}
.tarjeta:hover .icono{background:var(--cable);color:#fff}

/* Modalidades */
.modalidades{display:grid;gap:1.5rem}
.modalidad{background:#fff;border-top:4px solid var(--cable);border-radius:.75rem;padding:2rem;box-shadow:var(--sombra)}
.modalidad.destacada{background:var(--azul);color:#fff;border-top-color:var(--led)}
.modalidad.destacada p{color:#dbe7f1}
.lista{list-style:none;margin:1rem 0 0;padding:0}
.lista li{position:relative;margin-bottom:.5rem;padding-left:1.75rem}
.lista li::before{content:"";position:absolute;left:.1rem;top:.45em;width:.8rem;height:.4rem;border-left:2px solid var(--led);border-bottom:2px solid var(--led);transform:rotate(-45deg)}

/* Pasos */
.pasos{display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));margin:0;padding:0;list-style:none;counter-reset:paso}
.pasos li{position:relative;padding-top:3.75rem}
.pasos li::before{counter-increment:paso;content:counter(paso);position:absolute;top:0;left:0;display:grid;place-items:center;width:2.75rem;height:2.75rem;border-radius:50%;background:var(--azul);color:#fff;font-family:var(--titulos);font-size:1.2rem;box-shadow:0 0 0 6px var(--claro)}
.pasos li::after{content:"";position:absolute;top:1.35rem;left:3.75rem;right:-1rem;height:2px;background:linear-gradient(90deg,var(--cable),transparent)}
.pasos li:last-child::after{display:none}
.pasos p{color:var(--gris)}

/* Rejilla de ventajas */
.rejilla{display:grid;gap:2rem 3rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.rejilla article{border-top:3px solid var(--cable);padding-top:1rem}
.rejilla p{margin:0;color:var(--gris)}

/* Preguntas frecuentes */
.faq{max-width:50rem}
.faq details{margin-bottom:.75rem;background:#fff;border:1px solid var(--linea);border-radius:.6rem;transition:box-shadow .3s}
.faq details[open]{box-shadow:var(--sombra)}
.faq summary{display:flex;justify-content:space-between;gap:1rem;padding:1.1rem 1.5rem;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--cable);transition:transform .3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0;padding:0 1.5rem 1.25rem;color:var(--gris)}

/* Proyectos (discreto) */
.proyectos-mini{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem 2rem;padding-block:2.25rem}
.proyectos-mini p{margin:0;color:var(--gris)}
.chips{display:flex;flex-wrap:wrap;gap:.75rem}
.chip{padding:.5rem 1.1rem;border:1px solid var(--linea);border-radius:2rem;background:#fff;color:var(--tinta);font-weight:600;text-decoration:none;transition:border-color .2s,color .2s}
.chip:hover{border-color:var(--cable);color:var(--cable)}

/* Aviso (páginas de proyecto) */
.aviso{margin-top:2.5rem;padding:1.5rem 1.75rem;background:#fff;border-left:4px solid var(--led);border-radius:0 .6rem .6rem 0;box-shadow:var(--sombra)}
.aviso p:last-child{margin:0}

/* Contacto */
.contacto{background:linear-gradient(135deg,var(--azul-o),var(--azul));color:#fff;text-align:center}
.contacto p{margin-inline:auto;color:#dbe7f1}
.correo{display:inline-block;margin-top:.5rem;font-size:clamp(1.4rem,4vw,2.3rem);color:#fff;text-decoration:none;border-bottom:2px solid var(--led);word-break:break-all;transition:color .2s}
.correo:hover{color:var(--led)}

/* Pie */
.pie{padding-block:2rem;background:var(--tinta);color:#9fb1c1;font-size:.9rem}
.pie .contenedor{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem 2rem}
.pie p{margin:0}
.pie a{color:#dbe7f1}

/* Animación de aparición (solo con JavaScript activo) */
.js .revelar{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.js .revelar.visible{opacity:1;transform:none}

@media (min-width:48rem){.modalidades{grid-template-columns:1fr 1fr}}
@media (min-width:52rem){.dos{grid-template-columns:1fr 1fr}}
@media (max-width:64rem){.pasos li::after{display:none}}
@media (max-width:52rem){
  .js .menu-btn{display:block}
  .js #menu{position:absolute;top:100%;left:0;right:0;max-height:0;overflow:hidden;background:var(--azul-o);transition:max-height .35s}
  .js #menu.abierto{max-height:24rem}
  .js #menu ul{flex-direction:column;gap:0;padding:.5rem 1.25rem 1rem}
  .js #menu a{padding:.7rem 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .revelar{opacity:1;transform:none}
}