/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(48, 56, 65, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-normal);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  /* Evitar subpíxel shift en cálculo de ancho cuando cambia la scrollbar */
  will-change: background, box-shadow;
}

.header.scrolled {
  background: rgba(48, 56, 65, 0.98);
  box-shadow: var(--shadow-lg);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

.logo img {
  height: 60px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  display: block;
}

/* Navegación */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  width: 100%;
}

/* Botón móvil */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-sm);
}

/* CTA Header */
.header-cta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-cta .btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background);
    flex-direction: column;
    padding: var(--spacing-xl);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-list {
    flex-direction: column;
    gap: var(--spacing-lg);
    width: 100%;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-link::after {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .header-cta {
    display: none;
  }
}

/* Animación del menú móvil */
.mobile-menu-btn .bar {
  width: 25px;
  height: 3px;
  background: var(--white);
  margin: 5px 0;
  transition: var(--transition-normal);
  border-radius: 2px;
}

.mobile-menu-btn.active .bar:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-btn.active .bar:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active .bar:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}