/* ============================================
   Header & Navegación
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-base);
  background-color: transparent;
}

.header--scrolled {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  z-index: 1001;
}

.header__logo-img {
  height: 48px;
  width: auto;
  transition: opacity var(--transition-base);
}

/* Logo blanco/negro en homepage */
.header__logo-img--dark {
  display: none;
}

.header--scrolled .header__logo-img--light {
  display: none;
}

.header--scrolled .header__logo-img--dark {
  display: block;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-dark);
  transition: color var(--transition-base);
}

/* Navegación */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.header__nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-fast);
  position: relative;
}

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

.header__nav-link:hover::after,
.header__nav-link--active::after {
  width: 60%;
}

.header__nav-link:hover {
  color: var(--color-white);
}

.header--scrolled .header__nav-link {
  color: var(--color-gray-600);
}

.header--scrolled .header__nav-link:hover,
.header--scrolled .header__nav-link--active {
  color: var(--color-dark);
}

/* CTA del header */
.header__cta {
  margin-left: var(--space-4);
}

.header__cta .btn {
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-xs);
  border-color: var(--color-white);
  color: var(--color-white);
  background: transparent;
}

.header__cta .btn:hover {
  background-color: var(--color-white);
  color: var(--color-dark);
}

.header--scrolled .header__cta .btn {
  border-color: var(--color-dark);
  color: var(--color-dark);
}

.header--scrolled .header__cta .btn:hover {
  background-color: var(--color-dark);
  color: var(--color-white);
}

/* Hamburguesa */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  z-index: 1001;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  transition: all var(--transition-base);
}

.header--scrolled .header__hamburger span {
  background-color: var(--color-dark);
}

.header--open .header__hamburger span {
  background-color: var(--color-dark);
}

.header--open .header__hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header--open .header__hamburger span:nth-child(2) {
  opacity: 0;
}

.header--open .header__hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile overlay */
.header__mobile-overlay {
  display: none;
}

/* Responsive */
@media (max-width: 968px) {
  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .header__mobile-overlay {
    display: flex;
    position: fixed;
    inset: 0;
    background-color: var(--color-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  .header--open .header__mobile-overlay {
    opacity: 1;
    pointer-events: all;
  }

  .header__mobile-overlay .header__nav-link {
    font-size: var(--text-2xl);
    color: var(--color-dark);
    font-family: var(--font-heading);
  }

  .header__mobile-overlay .header__nav-link:hover {
    color: var(--color-accent);
  }

  .header__mobile-overlay .btn {
    margin-top: var(--space-4);
    border-color: var(--color-dark);
    color: var(--color-dark);
  }
}