/* ============================================================
   ALTUM ESPACIOS — Manual de identidad:
   Negro Espacio #101010 | Plata Altum #E0E0E0
   Gris Estructural #808080 | Blanco Puro #FFFFFF
   Titulares: Montserrat | Cuerpo: Open Sans
   ============================================================ */

:root{
  --negro:#101010;
  --negro-suave:#161616;
  --plata:#E0E0E0;
  --gris:#808080;
  --blanco:#FFFFFF;
  --whatsapp:#25D366;
  --transicion:.35s cubic-bezier(.4,0,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Open Sans',sans-serif;
  font-weight:400;
  color:var(--negro);
  background:var(--negro);
  line-height:1.7;
}
h1,h2,h3,h4{font-family:'Montserrat',sans-serif;font-weight:700;line-height:1.2}
h2{font-size:clamp(1.7rem,3.5vw,2.6rem);letter-spacing:-.01em}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}

.eyebrow{
  display:inline-block;
  font-family:'Montserrat',sans-serif;
  font-weight:600;
  font-size:.78rem;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--gris);
  margin-bottom:1rem;
}
.eyebrow-claro{color:var(--gris)}

/* ---------- Botones ---------- */
.btn{
  display:inline-block;
  font-family:'Montserrat',sans-serif;
  font-weight:600;
  font-size:.85rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  padding:.95rem 2.2rem;
  border:1px solid transparent;
  transition:var(--transicion);
  cursor:pointer;
  text-align:center;
}
.btn-outline{border-color:var(--plata);color:var(--plata)}
.btn-outline:hover{background:var(--plata);color:var(--negro)}
.btn-plata{background:var(--plata);color:var(--negro)}
.btn-plata:hover{background:var(--blanco)}
.btn-outline-oscuro{border-color:var(--negro);color:var(--negro)}
.btn-outline-oscuro:hover{background:var(--negro);color:var(--blanco)}
.btn-whatsapp{background:var(--whatsapp);color:var(--blanco)}
.btn-whatsapp:hover{filter:brightness(1.08)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:1.1rem 5vw;
  transition:background .4s ease,padding .4s ease;
}
.site-header.solido{background:rgba(16,16,16,.96);padding:.7rem 5vw;box-shadow:0 1px 0 rgba(224,224,224,.08)}
.header-logo img{height:44px;width:auto}
.site-nav{display:flex;gap:2.4rem}
.site-nav a{
  font-family:'Montserrat',sans-serif;font-weight:600;
  font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--plata);position:relative;padding:.3rem 0;
}
.site-nav a::after{
  content:'';position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--plata);transition:width .3s ease;
}
.site-nav a:hover::after{width:100%}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:.4rem}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--plata);margin:6px 0;transition:var(--transicion)}

/* ---------- Hero con persianas ---------- */
.hero{height:300vh;position:relative;background:var(--negro)}
.hero-sticky{
  position:sticky;top:0;height:100vh;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.hero-content{
  text-align:center;padding:0 6vw;z-index:1;
  opacity:0;transform:scale(.96);
}
.hero-logo{width:min(420px,70vw);margin:0 auto 2rem}
.hero-claim{
  font-family:'Montserrat',sans-serif;font-weight:400;
  color:var(--gris);font-size:clamp(1rem,2vw,1.25rem);
  letter-spacing:.06em;margin-bottom:2.4rem;
}
.blinds{
  position:absolute;inset:0;z-index:2;
  display:flex;flex-direction:column;
  perspective:900px;
}
.slat{
  flex:1;
  background:linear-gradient(180deg,#1d1d1d 0%,#141414 45%,#0b0b0b 100%);
  border-top:1px solid rgba(224,224,224,.10);
  border-bottom:1px solid rgba(0,0,0,.7);
  transform-origin:center top;
  will-change:transform;
  box-shadow:0 3px 8px rgba(0,0,0,.55);
}
.scroll-hint{
  position:absolute;bottom:2.2rem;left:50%;transform:translateX(-50%);
  z-index:3;text-align:center;color:var(--gris);
  font-family:'Montserrat',sans-serif;font-size:.72rem;
  letter-spacing:.3em;text-transform:uppercase;
  transition:opacity .4s ease;
}
.scroll-line{
  width:1px;height:44px;background:linear-gradient(var(--gris),transparent);
  margin:.8rem auto 0;animation:linea 1.8s ease-in-out infinite;
}
@keyframes linea{0%,100%{transform:scaleY(1)}50%{transform:scaleY(.55)}}

/* ---------- Strip ---------- */
.strip{
  background:var(--negro);color:var(--plata);
  padding:5rem 8vw;text-align:center;
  border-top:1px solid rgba(224,224,224,.08);
}
.strip p{
  font-family:'Montserrat',sans-serif;font-weight:400;
  font-size:clamp(1.05rem,2.2vw,1.5rem);letter-spacing:.02em;
  max-width:820px;margin:0 auto;
}

/* ---------- Catálogo ---------- */
.catalogo{background:var(--blanco);padding:6rem 5vw 7rem}
.section-head{max-width:760px;margin:0 auto 3rem;text-align:center}
.section-intro{color:var(--gris);margin-top:1rem}
.filtros{
  display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;
  margin-bottom:3rem;
}
.filtro{
  font-family:'Montserrat',sans-serif;font-weight:600;
  font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;
  padding:.6rem 1.3rem;border:1px solid #d5d5d5;background:var(--blanco);
  color:var(--gris);cursor:pointer;transition:var(--transicion);
}
.filtro:hover{border-color:var(--negro);color:var(--negro)}
.filtro.activo{background:var(--negro);border-color:var(--negro);color:var(--blanco)}

.grid-productos{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));
  gap:1.6rem;max-width:1280px;margin:0 auto;
}
.tarjeta{
  background:var(--blanco);border:1px solid #ececec;cursor:pointer;
  transition:var(--transicion);overflow:hidden;
  display:flex;flex-direction:column;
}
.tarjeta:hover{border-color:var(--negro);transform:translateY(-4px);box-shadow:0 14px 34px rgba(16,16,16,.10)}
.tarjeta-media{aspect-ratio:4/3;overflow:hidden;background:#f2f2f2}
.tarjeta-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.tarjeta:hover .tarjeta-media img{transform:scale(1.05)}
.tarjeta-info{padding:1.3rem 1.3rem 1.5rem;display:flex;flex-direction:column;gap:.35rem;flex:1}
.tarjeta-marca{
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:.68rem;
  letter-spacing:.24em;text-transform:uppercase;color:var(--gris);
}
.tarjeta-nombre{font-family:'Montserrat',sans-serif;font-weight:600;font-size:1.05rem}
.tarjeta-cta{
  margin-top:auto;padding-top:.8rem;
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:.74rem;
  letter-spacing:.16em;text-transform:uppercase;color:var(--negro);
}
.tarjeta-cta::after{content:' →'}

/* ---------- Showroom ---------- */
.showroom{
  background:var(--negro);color:var(--plata);
  display:grid;grid-template-columns:1fr 1fr;min-height:70vh;
}
.showroom-media{overflow:hidden}
.showroom-media img{width:100%;height:100%;object-fit:cover;min-height:340px}
.showroom-texto{
  display:flex;flex-direction:column;justify-content:center;
  padding:5rem 7vw;gap:1.4rem;
}
.showroom-texto p{color:var(--gris);max-width:46ch}
.showroom-texto .btn{align-self:flex-start}

/* ---------- Nosotros ---------- */
.nosotros{background:var(--blanco);padding:6rem 5vw}
.nosotros-cols{
  display:grid;grid-template-columns:1fr 1fr;gap:3rem;
  max-width:1000px;margin:0 auto;color:#3a3a3a;
}

/* ---------- Contacto ---------- */
.contacto{background:var(--negro);color:var(--plata);padding:6rem 5vw 7rem}
.contacto .section-head h2{color:var(--plata)}
.contacto-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:1.4rem;max-width:1000px;margin:0 auto;
}
.contacto-card{
  border:1px solid rgba(224,224,224,.16);padding:2.2rem 1.8rem;
  display:flex;flex-direction:column;gap:.5rem;
  transition:var(--transicion);
}
a.contacto-card:hover{border-color:var(--plata);transform:translateY(-3px)}
.contacto-label{
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:.72rem;
  letter-spacing:.26em;text-transform:uppercase;color:var(--gris);
}
.contacto-dato{font-family:'Montserrat',sans-serif;font-weight:600;font-size:1.15rem;color:var(--blanco)}
.contacto-accion{font-size:.85rem;color:var(--gris)}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--negro);border-top:1px solid rgba(224,224,224,.08);
  padding:3rem 5vw;text-align:center;color:var(--gris);font-size:.85rem;
}
.footer-logo{height:38px;width:auto;margin:0 auto 1.2rem}

/* ---------- Modal ---------- */
.modal{position:fixed;inset:0;z-index:100;display:none}
.modal.abierto{display:block}
.modal-fondo{position:absolute;inset:0;background:rgba(16,16,16,.82)}
.modal-caja{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--blanco);width:min(920px,92vw);max-height:90vh;
  display:grid;grid-template-columns:1fr 1fr;overflow:auto;
}
.modal-media{background:#f2f2f2}
.modal-media img{width:100%;height:100%;object-fit:cover;min-height:300px}
.modal-info{padding:2.6rem 2.4rem;display:flex;flex-direction:column;gap:1rem}
.modal-info h3{font-size:1.5rem}
.modal-especificaciones{font-size:.88rem;color:var(--gris)}
.modal-ctas{display:flex;flex-direction:column;gap:.7rem;margin-top:auto;padding-top:1rem}
.modal-cerrar{
  position:absolute;top:.6rem;right:.9rem;z-index:2;
  background:none;border:0;font-size:2rem;line-height:1;cursor:pointer;color:var(--negro);
}

/* ---------- WhatsApp flotante ---------- */
.whatsapp-flotante{
  position:fixed;bottom:1.6rem;right:1.6rem;z-index:70;
  width:56px;height:56px;border-radius:50%;
  background:var(--whatsapp);color:var(--blanco);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.35);
  transition:var(--transicion);
}
.whatsapp-flotante:hover{transform:scale(1.08)}

/* ---------- Responsive ---------- */
@media(max-width:860px){
  .hero{height:220vh}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,80vw);
    background:var(--negro);flex-direction:column;gap:0;
    padding:6rem 2.4rem 2rem;transform:translateX(100%);
    transition:transform .4s ease;box-shadow:-10px 0 40px rgba(0,0,0,.5);
  }
  .site-nav.abierto{transform:translateX(0)}
  .site-nav a{padding:1rem 0;border-bottom:1px solid rgba(224,224,224,.08)}
  .nav-toggle{display:block;z-index:65}
  .nav-toggle.abierto span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav-toggle.abierto span:nth-child(2){opacity:0}
  .nav-toggle.abierto span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .showroom{grid-template-columns:1fr}
  .nosotros-cols{grid-template-columns:1fr}
  .modal-caja{grid-template-columns:1fr}
  .modal-media img{max-height:40vh}
}

/* ---------- Accesibilidad: movimiento reducido ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero{height:100vh}
  .blinds{display:none}
  .hero-content{opacity:1 !important;transform:none !important}
  .scroll-hint{display:none}
  *{animation:none !important;transition:none !important}
}