/* Header y navegación mejorado */
.site-header {
  position: sticky;
  top: 0;
  z-index: 9999;
  background: rgba(11, 11, 15, 0.95);
  backdrop-filter: saturate(1.8) blur(20px);
  border-bottom: 1px solid rgba(255, 212, 0, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(0);
}

.site-header.header-hidden {
  transform: translateY(-100%);
}

.site-header.scrolled {
  background: rgba(11, 11, 15, 0.98);
  backdrop-filter: saturate(2) blur(25px);
  border-bottom-color: rgba(255, 212, 0, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  max-width: var(--maxw);
  margin: 0 auto;
  position: relative;
}

/* Brand mejorado */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.brand::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 212, 0, 0.05), transparent);
  transition: left 0.6s ease;
}

.brand:hover {
  background: rgba(255, 212, 0, 0.03);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 212, 0, 0.1);
}

.brand:hover::before {
  left: 100%;
}

.brand-text {
  color: var(--muted);
  transition: color 0.3s ease;
}

.brand:hover .brand-text {
  color: var(--accent);
}

/* Brand logos mejorado */
.brand-logos {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-logos .divider {
  opacity: 0.4;
  margin: 0 8px;
  color: var(--accent);
  font-weight: 300;
  transition: opacity 0.3s ease;
}

.brand:hover .brand-logos .divider {
  opacity: 0.8;
}

.brand-logos img {
  height: 28px;
  width: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  filter: brightness(0.9);
}

.brand:hover .brand-logos img {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.brand .plus {
  opacity: 0.6;
  margin: 0 4px;
  transition: opacity 0.3s ease;
}

.brand:hover .plus {
  opacity: 1;
  color: var(--accent);
}

/* Toggle button mejorado - Diseño hamburguesa moderno */
.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(255, 212, 0, 0.08), rgba(255, 212, 0, 0.03));
  border: 2px solid rgba(255, 212, 0, 0.25);
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-toggle::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 212, 0, 0.15), transparent);
  transition: left 0.5s ease;
}

.nav-toggle:hover {
  background: linear-gradient(135deg, rgba(255, 212, 0, 0.15), rgba(255, 212, 0, 0.08));
  border-color: rgba(255, 212, 0, 0.45);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(255, 212, 0, 0.2), 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-toggle:hover::before {
  left: 100%;
}

.nav-toggle:active {
  transform: translateY(-1px) scale(0.98);
  transition: all 0.15s ease;
}

.nav-toggle[aria-expanded="true"] {
  background: linear-gradient(135deg, rgba(255, 212, 0, 0.2), rgba(255, 212, 0, 0.12));
  border-color: rgba(255, 212, 0, 0.6);
  box-shadow: 0 4px 16px rgba(255, 212, 0, 0.25), inset 0 1px 3px rgba(255, 212, 0, 0.1);
}

/* Líneas del hamburguesa mejoradas */
.nav-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: linear-gradient(90deg, #FFD400, #FFF200);
  border-radius: 2px;
  transition: all 0.35s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform-origin: center;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  position: relative;
}

.nav-toggle span::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav-toggle:hover span::after {
  opacity: 1;
}

/* Animación de transformación a X */
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
  background: linear-gradient(90deg, #FFF, #FFD400);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scale(0) rotate(180deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
  background: linear-gradient(90deg, #FFF, #FFD400);
}

/* Menú de navegación mejorado */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-menu ul {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: 10px;
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.3px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.nav-menu a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 212, 0, 0.08), transparent);
  transition: left 0.5s ease;
}

.nav-menu a:hover {
  background: rgba(255, 212, 0, 0.06);
  color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 212, 0, 0.1);
}

.nav-menu a:hover::before {
  left: 100%;
}

.nav-menu a:active {
  transform: translateY(0) scale(0.98);
  transition: all 0.1s ease;
}

/* Indicador activo */
.nav-menu a.active {
  background: rgba(255, 212, 0, 0.1);
  color: var(--accent);
  font-weight: 600;
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  box-shadow: 0 0 8px rgba(255, 212, 0, 0.4);
}

.nav-menu .btn {
  margin-left: 16px;
}

/* Contenedor de acciones mejorado */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: 16px;
}

/* Responsive: menú móvil mejorado */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 280px;
    background: rgba(11, 11, 15, 0.98);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 212, 0, 0.15);
    border-radius: 16px;
    padding: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 212, 0, 0.1);
    transform: translateY(-10px) scale(0.95);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10000;
  }

  .nav-menu.open {
    display: flex;
    transform: translateY(0) scale(1);
    opacity: 1;
    animation: slideInDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-menu ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    padding: 14px 16px;
    border-radius: 12px;
    width: 100%;
    text-align: left;
    font-weight: 500;
  }

  .nav-menu a:hover {
    background: rgba(255, 212, 0, 0.1);
    transform: translateX(4px);
  }
  
  .nav-actions {
    margin-left: 0;
    flex-direction: column;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 212, 0, 0.1);
  }

  .nav-actions .btn {
    width: 100%;
    justify-content: center;
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  .site-nav {
    padding: 12px 16px;
  }

  .nav-menu {
    right: 16px;
    width: calc(100vw - 32px);
    max-width: 320px;
  }
}

/* Animaciones para el menú móvil */
@keyframes slideInDown {
  from {
    transform: translateY(-20px) scale(0.9);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* Overlay para cerrar menú móvil */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.nav-overlay.active {
   opacity: 1;
   visibility: visible;
 }

/* Estados de focus mejorados para accesibilidad */
.nav-menu a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(255, 212, 0, 0.2);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(255, 212, 0, 0.2);
}

.brand:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(255, 212, 0, 0.2);
}

/* Mejoras de rendimiento */
.site-header {
  will-change: background, backdrop-filter, box-shadow;
}

.nav-menu {
  will-change: transform, opacity;
}

.brand,
.nav-menu a,
.nav-toggle {
  will-change: transform;
}

/* Reducir movimiento para usuarios que lo prefieren */
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .brand,
  .nav-toggle,
  .nav-menu,
  .nav-menu a,
  .nav-overlay {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }
  
  .nav-menu.open {
    animation: none !important;
  }
}

/* Mejoras para pantallas de alta densidad */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .brand-logos img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Modo oscuro forzado del sistema */
@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(8, 8, 12, 0.95);
  }
  
  .site-header.scrolled {
    background: rgba(8, 8, 12, 0.98);
  }
}

/* Mejoras para dispositivos táctiles */
@media (hover: none) and (pointer: coarse) {
  .nav-menu a {
    padding: 16px 20px;
    font-size: 16px;
  }
  
  .nav-toggle {
    width: 48px;
    height: 48px;
  }
  
  .brand {
    padding: 12px 16px;
  }
}