/* ================================================================
   NAV — Encabezado y Navegación
   ================================================================ */

#mainHeader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: calc(var(--nav-height) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  transition: var(--transition), transform 0.35s ease;
}

#mainHeader.nav-hidden {
  transform: translateY(-100%);
}

#mainHeader::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(12, 20, 69, 0.7), transparent);
  transition: var(--transition);
  pointer-events: none;
}

#mainHeader.scrolled::before {
  background: var(--primary);
}

#mainHeader.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

nav {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* — Marca / Logo — */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.4));
  transition: var(--transition);
}

.nav-logo:hover {
  filter: drop-shadow(0 4px 16px rgba(200, 169, 81, 0.6));
  transform: scale(1.05);
}

.nav-brand h1 {
  font-size: clamp(0.85rem, 1.8vw, 1.05rem);
  color: var(--white);
  font-weight: 700;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  line-height: 1.2;
}

/* — Links — */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-links li a {
  display: block;
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition-fast);
}

.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 3px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 70%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links li a:hover { color: var(--accent-light); }

.nav-links li a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* — Botón hamburguesa — */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }