.site-header {
  /* base (móvil) */
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  /* base (móvil) */
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 0.75rem 1rem;
  @media (min-width: 768px) {
    padding: 0.85rem 2rem;
  }
  @media (min-width: 1024px) {
    padding: 1rem 2.5rem;
  }
}
/* ---- Marca / logo ---- */
.site-header__brand {
  /* base (móvil) */
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.site-header__logo {
  /* base (móvil) — cuando exista el archivo de logo */
  height: 78px;
  width: auto;
  @media (min-width: 1024px) {
    height: 120px;
  }
}
.site-header__brand-text {
  /* base (móvil) — respaldo textual mientras no hay logo */
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--color-navy);
  text-transform: uppercase;
  @media (min-width: 1024px) {
    font-size: 0.95rem;
  }
}
/* ---- Botón hamburguesa (solo móvil) ---- */
.site-header__toggle {
  /* base (móvil) */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  color: var(--color-navy);
  font-size: 1.4rem;
  cursor: pointer;
  @media (min-width: 1024px) {
    display: none;
  }
}
/* ---- Navegación ---- */
.site-header__nav {
  /* base (móvil) — oculta; se despliega vertical bajo el header */
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 8px 16px rgba(13, 35, 66, 0.06);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: max-height 0.28s ease, opacity 0.2s ease;
  @media (min-width: 1024px) {
    /* desktop: nav horizontal a la derecha, siempre visible */
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    background: transparent;
    border-bottom: none;
    box-shadow: none;
    max-height: none;
    overflow: visible;
    opacity: 1;
    visibility: visible;
  }
}
.site-header__nav--open {
  /* base (móvil) — estado abierto del menú */
  max-height: 70rem;
  opacity: 1;
  visibility: visible;
}
.site-header__link {
  /* base (móvil) */
  display: block;
  padding: 0.9rem 1.25rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-navy);
  border-bottom: 1px solid var(--color-border);
  transition: color 0.18s ease;
  cursor: pointer;
  @media (min-width: 1024px) {
    padding: 0.25rem 0;
    font-size: 0.82rem;
    border-bottom: 2px solid transparent;
  }
}
.site-header__link:hover {
  color: var(--color-blue);
}
.site-header__link--active {
  /* base (móvil) */
  color: var(--color-blue);
  @media (min-width: 1024px) {
    border-bottom-color: var(--color-blue);
  }
}

/* ==========================================================================
   Dropdown de Process Systems
   ========================================================================== */
.site-header__item {
  /* base (móvil) */
  display: block;
  @media (min-width: 1024px) {
    position: relative;
  }
}
.site-header__caret {
  /* base (móvil) */
  font-size: 0.65rem;
  margin-left: 0.3rem;
  transition: transform 0.2s ease;
}
/* ---- Submenú ---- */
.site-header__submenu {
  /* base (móvil) — anidado dentro del menú hamburguesa, siempre visible */
  display: flex;
  flex-direction: column;
  background: #f4f6f8;
  @media (min-width: 1024px) {
    /* desktop: flotante, oculto hasta hover */
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 250px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 24px rgba(13, 35, 66, 0.1);
    border-radius: 4px;
    padding: 0.4rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    z-index: 50;
  }
}
/* desktop: mostrar submenú al pasar el hover sobre el item */
@media (min-width: 1024px) {
  .site-header__item--has-sub:hover .site-header__submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .site-header__item--has-sub:hover .site-header__caret {
    transform: rotate(180deg);
  }
}
.site-header__sublink {
  /* base (móvil) */
  display: block;
  padding: 0.7rem 1.25rem 0.7rem 2rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-navy);
  border-bottom: 1px solid var(--color-border);
  transition: color 0.18s ease, background-color 0.18s ease;
  @media (min-width: 1024px) {
    padding: 0.6rem 1.25rem;
    border-bottom: none;
    text-transform: none;
    letter-spacing: 0;
  }
}
.site-header__sublink:hover {
  color: var(--color-blue);
  background: #f4f6f8;
}
.site-header__sublink--active {
  color: var(--color-blue);
}

.site-header__link--parent {
  /* base (móvil) — abre dropdown, no navega */
  cursor: default;
  user-select: none;
}