/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  height: var(--header-height-scroll);
  background: rgba(0, 45, 114, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.site-header.scrolled .logo-text {
  color: var(--color-blanco);
}

.site-header.scrolled .nav-link {
  color: var(--color-blanco);
}

.site-header.scrolled .nav-link:hover {
  color: var(--color-dorado);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-container);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===== LOGO ===== */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  z-index: 1001;
}

.logo-symbol {
  width: 45px;
  height: 45px;
  position: relative;
  flex-shrink: 0;
}

.logo-image {
  height: 50px;
  width: auto;
  display: block;
  transition: transform var(--transition-fast);
}

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

.logo-text {
  font-family: var(--font-titulos);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-azul-oscuro);
  transition: color var(--transition-normal);
}

.logo-text .euro {
  color: var(--color-azul-marino);
}

.logo-text .impacta {
  color: var(--color-dorado);
}

/* ===== NAVIGATION ===== */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-titulos);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-azul-oscuro);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-dorado);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

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

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

/* ===== LANGUAGE SELECTOR ===== */
.lang-selector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(0, 45, 114, 0.2);
  border-radius: var(--border-radius-md);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-selector:hover {
  border-color: var(--color-dorado);
  background: rgba(255, 194, 0, 0.05);
}

.lang-selector span {
  font-family: var(--font-titulos);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-azul-marino);
}

.site-header.scrolled .lang-selector {
  border-color: rgba(255, 255, 255, 0.3);
}

.site-header.scrolled .lang-selector span {
  color: var(--color-blanco);
}

/* ===== MOBILE MENU TOGGLE ===== */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1002;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-azul-marino);
  border-radius: 2px;
  transition: all var(--transition-normal);
  display: block;
}

.menu-toggle span:not(:last-child) {
  margin-bottom: 5px;
}

.site-header.scrolled .menu-toggle span {
  background: var(--color-blanco);
}

/* Animación hamburger → X */
.menu-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ===== RESPONSIVE MOBILE MENU ===== */
@media (max-width: 1024px) {
  .menu-toggle {
    display: flex;
  }
  
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-azul-oscuro) 0%, var(--color-azul-marino) 100%);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-lg) var(--spacing-lg);
    gap: 0;
    transition: right var(--transition-slow);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
  }
  
  .main-nav.active {
    right: 0;
  }
  
  .nav-menu {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 0;
  }
  
  .nav-menu li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-link {
    color: var(--color-blanco);
    display: block;
    width: 100%;
    padding: var(--spacing-sm) 0;
    font-size: var(--text-lg);
  }
  
  .nav-link::after {
    display: none;
  }
  
  .nav-link:hover {
    color: var(--color-dorado);
    padding-left: var(--spacing-xs);
  }
  
  .lang-selector {
    margin-top: var(--spacing-md);
    width: 100%;
    justify-content: center;
    border-color: rgba(255, 255, 255, 0.3);
  }
  
  .lang-selector span {
    color: var(--color-blanco);
  }
  
  .nav-cta {
    width: 100%;
    margin-top: var(--spacing-md);
  }
  
  .nav-cta .btn {
    width: 100%;
  }
}

/* Overlay para cerrar menú móvil */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

@media (max-width: 768px) {
  .logo-text {
    font-size: var(--text-lg);
  }
  
  .logo-symbol {
    width: 38px;
    height: 38px;
  }
}