:root{
  --rojo:#C0271B;
  --rojo-vivo:#E23425;
  --tinta:#1c1c1c;
  --gris:#6b6b6b;
  --linea:#e6e6e6;
  --blanco:#fff;
  --max:1180px;
  --radio:2px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  color:var(--tinta);
  background:var(--blanco);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
.env{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.cab{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--linea);
}
.cab .env{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:88px}
.logo img{width:132px;height:auto}
.nav{display:flex;gap:26px;align-items:center;flex-wrap:wrap}
.nav a{
  text-decoration:none;color:var(--rojo);font-size:.95rem;
  padding:6px 0;border-bottom:2px solid transparent;transition:border-color .18s;
  white-space:nowrap;
}
.nav a:hover,.nav a:focus-visible{border-bottom-color:var(--rojo)}
.nav .externo::after{content:"↗";font-size:.75em;margin-left:4px;opacity:.6}
.menu-btn{display:none;background:none;border:1px solid var(--linea);border-radius:var(--radio);padding:10px 12px;cursor:pointer;font-size:1.1rem;color:var(--rojo)}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:min(74vh,620px);
  display:grid;place-items:center;
  text-align:center;
  padding:96px 0;
  background:#f4f4f4 url("assets/hero.webp") center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,8,6,.62),rgba(120,20,12,.68));
}
.hero .env{position:relative;z-index:1}
.hero h1{
  font-size:clamp(2.1rem,6.2vw,4.4rem);
  line-height:1.04;margin:0 0 18px;
  color:#fff;font-weight:800;letter-spacing:-.02em;
  text-shadow:0 2px 24px rgba(0,0,0,.35);
}
.hero p{
  font-size:clamp(1rem,2.1vw,1.22rem);margin:0 auto;max-width:56ch;
  color:rgba(255,255,255,.94);text-shadow:0 1px 12px rgba(0,0,0,.3);
}

/* ---------- bandas ---------- */
.banda{background:var(--rojo-vivo);color:var(--blanco);padding:76px 0}
.banda h2,.banda h3{color:var(--blanco)}
.seccion{padding:76px 0}
h2{font-size:clamp(1.9rem,4vw,2.9rem);font-weight:400;text-align:center;margin:0 0 14px;letter-spacing:.01em}
.bajada{text-align:center;max-width:70ch;margin:0 auto 44px;opacity:.95}

/* ---------- servicios ---------- */
.rejilla{
  display:grid;gap:18px;
  grid-template-columns:repeat(auto-fit,minmax(186px,1fr));
}
.tarjeta{
  position:relative;border:0;padding:0;margin:0;cursor:pointer;
  aspect-ratio:3/4;overflow:hidden;border-radius:var(--radio);
  background:#111;color:var(--blanco);font:inherit;text-align:center;
  display:grid;place-items:center;
}
.tarjeta img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.62;transition:opacity .3s,transform .5s;
}
.tarjeta:hover img,.tarjeta:focus-visible img{opacity:.34;transform:scale(1.06)}
.tarjeta span{position:relative;z-index:1;padding:0 12px}
.tarjeta b{display:block;font-size:1.06rem;font-weight:500;letter-spacing:.05em}
.tarjeta em{
  display:block;font-style:normal;font-size:.86rem;margin-top:8px;
  opacity:0;transform:translateY(6px);transition:opacity .25s,transform .25s;
}
.tarjeta:hover em,.tarjeta:focus-visible em{opacity:1;transform:none}
.tarjeta:focus-visible{outline:3px solid #fff;outline-offset:-3px}

/* ---------- detalle de servicio ---------- */
.detalle{border:0;padding:0;max-width:min(980px,92vw);width:100%;border-radius:var(--radio);}
.detalle::backdrop{background:rgba(0,0,0,.72)}
.detalle .caja{padding:34px}
.detalle h3{margin:0 0 12px;font-size:1.7rem;color:var(--rojo);font-weight:600}
.detalle p,.detalle li{color:#333}
.detalle ul{margin:12px 0 0;padding-left:20px}
.cerrar{
  position:absolute;top:12px;right:12px;
  background:none;border:0;font-size:1.9rem;line-height:1;cursor:pointer;color:#666;padding:6px 12px;
}
.cerrar:hover{color:var(--tinta)}

/* ---------- galeria ---------- */
.galeria{
  display:grid;gap:10px;
  grid-template-columns:repeat(auto-fill,minmax(168px,1fr));
  margin-top:8px;
}
.galeria a{display:block;overflow:hidden;border-radius:var(--radio);background:#f0f0f0}
.galeria img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:transform .4s}
.galeria a:hover img{transform:scale(1.05)}

/* ---------- quienes somos ---------- */
.texto-centro{max-width:78ch;margin:0 auto;text-align:center;font-size:1.05rem}

/* ---------- contacto ---------- */
.contacto-grid{display:grid;gap:40px;grid-template-columns:1fr 1fr;align-items:start}
.campo{margin-bottom:16px}
.campo label{display:block;font-size:.86rem;margin-bottom:6px;opacity:.95}
.campo input,.campo textarea{
  width:100%;padding:12px 14px;border:1px solid rgba(255,255,255,.55);
  background:rgba(255,255,255,.1);color:var(--blanco);border-radius:var(--radio);
  font:inherit;
}
.campo input::placeholder,.campo textarea::placeholder{color:rgba(255,255,255,.7)}
.campo input:focus,.campo textarea:focus{outline:2px solid #fff;outline-offset:1px}
.boton{
  background:var(--blanco);color:var(--rojo);border:0;padding:13px 34px;
  font:inherit;font-weight:600;cursor:pointer;border-radius:var(--radio);
}
.boton:hover{opacity:.9}
.datos{font-size:1rem;line-height:2}
.datos a{color:var(--blanco)}
.datos strong{display:block;font-size:.8rem;text-transform:uppercase;letter-spacing:.09em;opacity:.8;margin-top:18px}

/* ---------- grupo ---------- */
.grupo{text-align:center}
.grupo img{width:190px;margin:0 auto 24px}
.enlace-boton{
  display:inline-block;margin-top:26px;padding:13px 34px;
  border:1px solid var(--tinta);text-decoration:none;border-radius:var(--radio);
  transition:background .2s,color .2s;
}
.enlace-boton:hover{background:var(--tinta);color:var(--blanco)}

/* ---------- pie ---------- */
.pie{background:var(--rojo);color:var(--blanco);padding:26px 0;text-align:center;font-size:.9rem}
.pie a{color:var(--blanco)}

@media (max-width:860px){
  .contacto-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .menu-btn{display:block}
  .nav{
    display:none;position:absolute;top:88px;left:0;right:0;
    background:var(--blanco);border-bottom:1px solid var(--linea);
    flex-direction:column;align-items:flex-start;gap:0;padding:8px 24px 18px;
  }
  .nav.abierto{display:flex}
  .nav a{padding:12px 0;width:100%}
  .cab .env{position:relative}
  .rejilla{grid-template-columns:repeat(2,1fr)}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}