/* =========================================================
   HEADER — navegación fija, logo, menú y menú móvil
========================================================= */
header{
  position:fixed;top:0;left:0;width:100%;z-index:200;height:var(--header-height);
  background:rgba(10,13,19,0.28);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease-premium), border-color .4s var(--ease-premium), backdrop-filter .4s var(--ease-premium);
}
header.scrolled{
  background:rgba(10,13,19,0.88);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(244,180,0,0.18);
}
nav{height:var(--header-height);max-width:var(--container-max);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{
  display:inline-flex;align-items:center;justify-content:center;text-decoration:none;
  padding:6px 0;position:relative;
}
.brand img{
  width:clamp(118px, 9vw, 165px);height:auto;max-height:64px;
  object-fit:contain;display:block;
  filter:drop-shadow(0 0 10px rgba(244,180,0,0.18));
  transition:transform .3s var(--ease-premium), filter .3s var(--ease-premium);
}
.brand:hover img{
  transform:translateY(-1px) scale(1.03);
  filter:drop-shadow(0 0 10px rgba(244,180,0,0.35)) drop-shadow(0 0 24px rgba(244,180,0,0.18));
}
.brand::after{
  content:'';position:absolute;inset:-10px -18px;border-radius:18px;
  background:radial-gradient(circle, rgba(244,180,0,0.12), transparent 62%);
  opacity:0;transition:opacity .3s var(--ease-premium);pointer-events:none;
}
.brand:hover::after{opacity:1;}
.logo-fallback{
  display:none;font-family:var(--font-label);font-weight:700;letter-spacing:0.12em;
  font-size:1.05rem;text-transform:uppercase;white-space:nowrap;
}
.logo-fallback .gold{color:var(--color-gold);}
.logo-fallback .white{color:var(--color-white);}
@media (max-width:480px){
  :root{--header-height:72px;}
  .brand img{width:112px;max-height:52px;}
}
.nav-links{display:flex;gap:34px;list-style:none;}
.nav-links a{
  color:var(--color-gray);text-decoration:none;font-family:var(--font-label);font-weight:700;
  letter-spacing:0.12em;font-size:0.78rem;text-transform:uppercase;position:relative;transition:color .3s;
}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--color-gold);transition:width .3s var(--ease-premium);}
.nav-links a:hover{color:var(--color-white);}
.nav-links a:hover::after{width:100%;}

.nav-cta{
  border:1px solid var(--color-gold);color:var(--color-gold);background:transparent;
  padding:10px 22px;font-family:var(--font-label);font-weight:700;
  letter-spacing:0.1em;font-size:0.76rem;text-transform:uppercase;text-decoration:none;
  transition:all .3s var(--ease-premium);white-space:nowrap;
}
.nav-cta:hover{background:var(--color-gold);color:#0a0a0a;box-shadow:0 0 24px var(--color-gold-glow);}

/* Botón hamburguesa */
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  width:42px;height:42px;background:transparent;border:1px solid var(--color-line);border-radius:8px;cursor:pointer;
}
.nav-toggle span{width:20px;height:2px;background:var(--color-gold);transition:transform .3s var(--ease-premium), opacity .3s var(--ease-premium);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* Menú móvil */
.mobile-menu{
  position:fixed;top:var(--header-height);left:0;width:100%;
  background:rgba(10,13,19,0.96);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--color-line);
  display:flex;flex-direction:column;gap:4px;padding:12px 24px 28px;
  transform:translateY(-12px);opacity:0;visibility:hidden;pointer-events:none;
  transition:transform .35s var(--ease-premium), opacity .35s var(--ease-premium), visibility .35s;
  z-index:199;
}
.mobile-menu.open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto;}
.mobile-menu a{
  color:var(--color-white);text-decoration:none;font-family:var(--font-label);font-weight:700;
  letter-spacing:0.1em;font-size:0.95rem;text-transform:uppercase;padding:14px 4px;border-bottom:1px solid var(--color-line);
}
.mobile-menu a:last-of-type{border-bottom:none;}
.mobile-menu .nav-cta{margin-top:14px;text-align:center;}

@media (max-width:860px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
}
@media (min-width:861px){
  .mobile-menu{display:none;}
}