/* Encabezado compartido por el inicio y el menú: logo, links y menú móvil a pantalla completa. */
html{scroll-behavior:smooth;}
header[id],section[id]{scroll-margin-top:96px;}
body.nav-lock{overflow:hidden;}

.site-nav{position:sticky;top:0;z-index:900;font-family:var(--font-body,"Barlow",system-ui,sans-serif);display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 20px;background:transparent;border-bottom:2px solid color-mix(in oklab,var(--primary,#1fa3b3) 40%,transparent);}
.site-nav-brand{display:block;line-height:0;position:relative;z-index:2;}
.site-nav-brand img{width:64px;height:64px;border-radius:14px;border:3px solid var(--foreground,#2b241d);box-shadow:0 4px 0 oklch(0 0 0/.7);object-fit:cover;}
.site-nav-links{display:flex;align-items:center;gap:26px;font-weight:700;margin-left:auto;}
.site-nav-actions{display:flex;align-items:center;gap:4px;position:relative;z-index:2;}
.site-nav-link{position:relative;color:var(--foreground,#2b241d);text-decoration:none;font-size:.95rem;padding:6px 0;}
.site-nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--primary,#1fa3b3);transform:scaleX(0);transform-origin:left;transition:transform .2s;}
.site-nav-link:hover{color:var(--primary,#1fa3b3);}
.site-nav-link:hover::after{transform:scaleX(1);}
.site-nav-toggle{display:none;}
@media (min-width:768px){.site-nav{padding:12px 32px;}}

/* Móvil: hamburguesa sin recuadro y menú a pantalla completa en turquesa translúcido */
@media (max-width:767px){
  .site-nav-brand img{width:52px;height:52px;}
  .nav-open .site-nav-brand,.nav-open .site-nav-actions{z-index:0;}
  .site-nav-actions{margin-left:auto;}
  .site-nav-toggle{display:flex;flex-direction:column;justify-content:center;gap:7px;position:relative;z-index:2;width:44px;height:44px;padding:0 7px;border:none;background:none;cursor:pointer;}
  .site-nav-toggle span{display:block;height:2px;border-radius:2px;background:#fff;box-shadow:0 1px 4px oklch(0 0 0/.5);transition:transform .25s,opacity .2s;}
  .nav-open .site-nav-toggle span{box-shadow:none;}
  .nav-open .site-nav-toggle span:nth-child(1){transform:translateY(9px) rotate(45deg);}
  .nav-open .site-nav-toggle span:nth-child(2){opacity:0;}
  .nav-open .site-nav-toggle span:nth-child(3){transform:translateY(-9px) rotate(-45deg);}

  .site-nav-links{position:fixed;inset:0;z-index:1;flex-direction:column;justify-content:center;gap:14px;padding:96px 24px 40px;background:rgb(22 158 170 / .9);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);overflow-y:auto;opacity:0;visibility:hidden;transition:opacity .3s,visibility 0s .3s;}
  .nav-open .site-nav-links{opacity:1;visibility:visible;transition:opacity .3s;}
  .site-nav-link{color:#fff;font-weight:500;font-size:1.45rem;line-height:1.3;letter-spacing:.09em;text-transform:uppercase;padding:4px 0;}
  .site-nav-link:hover{color:#fff;opacity:.8;}
  .site-nav-link::after{background:#fff;height:2px;}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}.site-nav-links,.site-nav-toggle span{transition:none;}}

:root{--banner-pos:center;--banner-veil:linear-gradient(oklch(0 0 0/.58),oklch(0 0 0/.66));}
@media (max-width:767px){:root{--banner-pos:74% center;}}

/* Encabezado: transparente arriba; al bajar muestra el mismo trozo de la foto para tapar lo que pasa por debajo */
.site-nav{position:fixed;left:0;right:0;top:0;background:transparent;border-bottom-color:transparent;transition:box-shadow .25s;}
.site-nav::before{content:"";position:absolute;top:0;left:0;width:100vw;height:100vh;height:100lvh;z-index:0;background:var(--banner-veil),url(banner.jpg) var(--banner-pos)/cover no-repeat;opacity:0;transition:opacity .25s;pointer-events:none;}
.site-nav.scrolled{overflow:hidden;box-shadow:0 6px 18px oklch(0 0 0/.35);}
.site-nav.scrolled.nav-open{overflow:visible;}
.site-nav.scrolled::before{opacity:1;}
.site-nav.nav-open::before{opacity:0;}
@media (min-width:768px){
  .site-nav-links{position:relative;z-index:2;}
  .site-nav-link{color:#fff;text-shadow:0 1px 8px oklch(0 0 0/.6);}
  .site-nav-link:hover{color:oklch(84% .1 200);}
}

/* Páginas sin foto de fondo (el menú): la franja del encabezado siempre muestra la foto. */
.site-nav.site-nav-solid{overflow:hidden;box-shadow:0 6px 18px oklch(0 0 0/.35);}
.site-nav.site-nav-solid.nav-open{overflow:visible;}
.site-nav.site-nav-solid::before{opacity:1;}
.site-nav.site-nav-solid.nav-open::before{opacity:0;}