.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--space-4);
  transition: background-color var(--duration-normal) ease,
              padding var(--duration-normal) ease,
              box-shadow var(--duration-normal) ease;
}

.site-header.is-scrolled {
  background-color: var(--color-bg);
  padding-block: var(--space-3);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

/* Logo */
.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-logo img {
  height: 40px;
  width: auto;
}

.site-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-logo__name {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.site-logo__tagline {
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* Navegación */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav__item { position: relative; }

.main-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) ease;
  white-space: nowrap;
  background: none;
  border: none;
}

.main-nav__link:hover,
.main-nav__link.is-active {
  color: var(--color-text);
}

.main-nav__link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-fast) ease;
}

.main-nav__item:hover .main-nav__link svg {
  transform: rotate(180deg);
}

/* Dropdown */
.main-nav__dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--duration-fast) ease,
              visibility var(--duration-fast) ease,
              transform var(--duration-fast) ease;
  box-shadow: var(--shadow-card);
}

.main-nav__item:hover .main-nav__dropdown,
.main-nav__item:focus-within .main-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) ease,
              background-color var(--duration-fast) ease;
}

.main-nav__dropdown-link:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.06);
}

/* CTA whatsapp dentro del nav — solo mobile */
.main-nav > .btn-whatsapp { display: none; }

/* CTA whatsapp header */
.header-cta {
  margin-left: var(--space-4);
  flex-shrink: 0;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  padding: var(--space-1);
  margin-left: auto;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-normal) ease,
              opacity var(--duration-normal) ease;
}

.nav-toggle.is-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.is-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
@media (max-width: 1023px) {
  .nav-toggle { display: flex; }

  .main-nav {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: var(--space-24) var(--container-pad);
    transform: translateX(100%);
    transition: transform var(--duration-normal) var(--ease-out-expo);
    overflow-y: auto;
    margin-left: 0;
  }

  .main-nav.is-open {
    transform: translateX(0);
  }

  .main-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .main-nav__link {
    font-size: var(--text-xl);
    padding: var(--space-3) 0;
    color: var(--color-text);
    width: 100%;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .main-nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: none;
    padding: 0 0 0 var(--space-4);
    display: none;
  }

  .main-nav__item.is-open .main-nav__dropdown {
    display: block;
  }

  .main-nav__dropdown-link {
    font-size: var(--text-lg);
    padding: var(--space-2) 0;
    color: var(--color-text-muted);
    border-radius: 0;
  }

  .header-cta { display: none; }
  .main-nav > .btn-whatsapp { display: flex; }
}