/* ==========================================================
   CABECERA — barra fija, navegacion, menu offcanvas y barra de progreso
   ========================================================== */

/* ---------- HEADER ---------- */
header{
  position:sticky; top:0; z-index:60;
}
header::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:rgba(246,243,236,0.90);
  -webkit-backdrop-filter:blur(8px);
          backdrop-filter:blur(8px);
  border-bottom:1px solid var(--rule);
  transition:box-shadow .35s ease, background-color .35s ease;
}
header.is-stuck::before{
  background:rgba(246,243,236,0.97);
  box-shadow:0 1px 18px rgba(10,24,48,0.09);
}
.scroll-progress{
  position:absolute; left:0; bottom:-1px; height:2px; width:100%;
  transform:scaleX(var(--p, 0)); transform-origin:left;
  background:var(--brass); z-index:2;
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  padding:18px 32px;
  max-width:1120px; margin:0 auto;
  transition:padding .35s var(--ease-out);
}
header.is-stuck .header-inner{padding:11px 32px;}
.mark{
  display:flex; align-items:center; gap:12px;
  text-decoration:none;
}
.mark-glyph{
  width:52px; height:52px;
  border:1.5px solid var(--navy);
  display:flex; align-items:center; justify-content:center;
  font-family:'Libre Baskerville', serif;
  font-weight:700; font-size:15px; color:var(--navy);
  flex-shrink:0;
  transition:width .35s var(--ease-out), height .35s var(--ease-out),
             font-size .35s var(--ease-out),
             background-color var(--t-hover) ease, color var(--t-hover) ease;
}
header.is-stuck .mark-glyph{width:42px; height:42px; font-size:13px;}
.mark:hover .mark-glyph{background:var(--navy); color:var(--paper);}
.mark-name{
  font-family:'Libre Baskerville', serif;
  font-weight:700; font-size:15px; color:var(--navy);
  letter-spacing:0.01em; white-space:nowrap;
  transition:font-size .35s var(--ease-out);
}
header.is-stuck .mark-name{font-size:14px;}
.mark-name span{display:block; font-family:'Montserrat',sans-serif; font-weight:400; font-size:12px; color:var(--slate); letter-spacing:0.06em; margin-top:3px;}

nav.primary{display:flex; align-items:center; gap:20px;}
.nav-link{
  font-size:13.5px; text-decoration:none; color:var(--ink);
  position:relative; padding-bottom:3px; white-space:nowrap;
  transition:color var(--t-hover) ease;
}
.nav-link::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:1px;
  background:var(--brass); transform:scaleX(0); transform-origin:left;
  transition:transform .3s var(--ease-out);
}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--navy);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-cta{
  border:1px solid var(--navy); padding:9px 18px; font-size:13px;
  text-decoration:none; color:var(--navy); white-space:nowrap;
  position:relative; overflow:hidden; z-index:0;
  transition:color var(--t-hover) ease;
}
.nav-cta::before{
  content:""; position:absolute; inset:0; z-index:-1; background:var(--navy);
  transform:scaleX(0); transform-origin:left;
  transition:transform var(--t-hover) var(--ease-flip);
}
.nav-cta:hover{color:var(--paper);}
.nav-cta:hover::before{transform:scaleX(1);}

.menu-toggle{display:none; background:none; border:none; cursor:pointer; padding:8px; z-index:62; position:relative;}
.menu-toggle span{display:block; width:22px; height:1.5px; background:var(--navy); margin:5px 0; transition:transform .3s var(--ease-out), opacity .2s ease;}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* Offcanvas: panel deslizante anclado a la derecha + fondo oscurecido */
.nav-backdrop{
  position:fixed; inset:0; background:rgba(10,24,48,0.55);
  opacity:0; visibility:hidden; transition:opacity .3s ease, visibility .3s ease;
  z-index:56;
}
.nav-backdrop.open{opacity:1; visibility:visible;}

@media (max-width:980px){
  nav.primary{
    position:fixed; top:0; right:0; bottom:0; width:min(340px, 86vw);
    background:var(--paper); z-index:61;
    flex-direction:column; align-items:flex-start; gap:0;
    padding:96px 30px 32px; transform:translateX(100%);
    transition:transform .38s var(--ease-flip); overflow-y:auto;
    box-shadow:-14px 0 40px rgba(10,24,48,0.14);
  }
  nav.primary.open{transform:translateX(0);}
  nav.primary .nav-link{
    width:100%; padding:16px 0; border-bottom:1px solid var(--rule); font-size:16px;
    opacity:0; transform:translateX(24px);
    transition:opacity .4s var(--ease-out), transform .4s var(--ease-out);
  }
  nav.primary.open .nav-link{opacity:1; transform:none;}
  nav.primary.open .nav-link:nth-child(1){transition-delay:.08s;}
  nav.primary.open .nav-link:nth-child(2){transition-delay:.13s;}
  nav.primary.open .nav-link:nth-child(3){transition-delay:.18s;}
  nav.primary.open .nav-link:nth-child(4){transition-delay:.23s;}
  nav.primary.open .nav-link:nth-child(5){transition-delay:.28s;}
  nav.primary .nav-cta{
    margin-top:24px; width:100%; text-align:center;
    opacity:0; transform:translateX(24px);
    transition:opacity .4s var(--ease-out) .3s, transform .4s var(--ease-out) .3s, color var(--t-hover) ease;
  }
  nav.primary.open .nav-cta{opacity:1; transform:none;}
  .menu-toggle{display:block;}
  .mark-name{font-size:17px; white-space:normal;}
  .mark-name span{font-size:12px;}
}
/* ---------- AJUSTES DE CABECERA EN ANCHOS INTERMEDIOS ---------- */
@media (max-width:1160px){
  nav.primary{gap:15px;}
  .nav-link{font-size:12px;}
  .mark-name{font-size:13.5px;}
  .mark-name span{font-size:11px;}
  .mark-glyph{width:46px; height:46px;}
}