/* Header y Navegación */
.header {
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
  backdrop-filter: blur(10px);
  color: var(--text-white);
  box-shadow: var(--shadow-lg);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-normal);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-white);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.025em;
}

/* Tagline del header */
.nav-tagline {
  font-size: 0.9rem;
  font-weight: 400;
  font-style: italic;
  color: var(--accent-cyan);
  opacity: 0.9;
  letter-spacing: 0.025em;
}

/* Logo solo (sin texto) */
.nav-logo-only {
  gap: 0;
}

.nav-logo-icon {
  width: var(--logo-header-size);
  height: var(--logo-header-size);
  color: var(--accent-cyan);
  transition: all var(--transition-normal);
}

/* Favicon grande en header */
.nav-favicon-large {
  width: var(--logo-favicon-large);
  height: var(--logo-favicon-large);
  object-fit: contain;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width var(--transition-normal);
}

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

/* Menú móvil */
.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-white);
  margin: 3px 0;
  transition: var(--transition-fast);
}

.nav-mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--bg-secondary);
  box-shadow: var(--shadow-lg);
}

.nav-mobile.active {
  display: block;
}

.nav-mobile a {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--text-gray-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-fast);
}

.nav-mobile a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-tagline {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .nav-tagline {
    font-size: 0.75rem;
  }
  
  .nav-logo {
    gap: 0.5rem;
  }
}