/* ─── Header ─────────────────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--header-height);
  background-color: rgba(26, 46, 74, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base),
              height var(--transition-base);
}

/* backdrop-filter en pseudo-elemento para no crear containing block
   en hijos con position:fixed (el menú mobile quedaría cortado si
   el filtro estuviera en el elemento padre) */
.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: -1;
  pointer-events: none;
}

/* Estado al hacer scroll */
.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-header);
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-8);
}

/* ─── Logo ───────────────────────────────────────────────────────────────── */
.logo {
  position: relative;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

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

/* Logo claro: visible por defecto (header oscuro) */
.logo-img--light {
  opacity: 1;
}

/* Logo oscuro: superpuesto, oculto por defecto */
.logo-img--dark {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

/* Al hacer scroll el header pasa a blanco → invertir logos */
.site-header.is-scrolled .logo-img--light {
  opacity: 0;
}

.site-header.is-scrolled .logo-img--dark {
  opacity: 1;
}

/* ─── Navegación ─────────────────────────────────────────────────────────── */
.nav-main {
  flex: 1;
  display: flex;
  justify-content: center;
}

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

.nav-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-full);
  transition: color var(--transition-base),
              background-color var(--transition-base);
  letter-spacing: 0.01em;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.12);
}

/* Links cuando header es blanco */
.site-header.is-scrolled .nav-link {
  color: var(--color-text-muted);
}

.site-header.is-scrolled .nav-link:hover,
.site-header.is-scrolled .nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

/* ─── Acciones del header ────────────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.header-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--transition-base);
  white-space: nowrap;
}

.header-phone:hover {
  color: var(--color-white);
}

.site-header.is-scrolled .header-phone {
  color: var(--color-text-muted);
}

.site-header.is-scrolled .header-phone:hover {
  color: var(--color-primary);
}

/* ─── Hamburguesa ────────────────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  padding: var(--space-2);
  flex-shrink: 0;
  transition: background-color var(--transition-fast);
}

.hamburger:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.site-header.is-scrolled .hamburger:hover {
  background-color: var(--color-bg-alt);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: var(--color-white);
  transition: transform var(--transition-base),
              opacity var(--transition-base),
              background-color var(--transition-base);
  transform-origin: center;
}

.site-header.is-scrolled .hamburger-line {
  background-color: var(--color-primary);
}

/* Estado abierto del hamburguesa */
.hamburger[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ─── Overlay mobile ─────────────────────────────────────────────────────── */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 800;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  backdrop-filter: blur(2px);
}

.nav-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* Oculto en desktop, visible solo en mobile via media query */
.nav-close { display: none; }

/* ─── Responsive: Mobile ─────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .header-phone span {
    display: none;
  }

  .header-phone svg {
    color: rgba(255, 255, 255, 0.9);
  }
}

@media (max-width: 768px) {
  /* En mobile el header siempre es oscuro (no hay blur, no hay is-scrolled blanco)
     Esto también elimina el backdrop-filter que causaba que el menú quedara
     confinado al alto del header en lugar de ocupar toda la pantalla */
  .site-header::before {
    display: none;
  }

  .site-header,
  .site-header.is-scrolled {
    background-color: rgba(26, 46, 74, 0.97);
    box-shadow: none;
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }

  /* Mantener logo claro siempre visible en mobile */
  .site-header.is-scrolled .logo-img--light { opacity: 1; }
  .site-header.is-scrolled .logo-img--dark  { opacity: 0; }

  /* Hamburger siempre blanco en mobile */
  .site-header.is-scrolled .hamburger-line {
    background-color: var(--color-white);
  }

  .hamburger {
    display: flex;
    margin-left: auto;
  }

  .header-phone {
    display: none;
  }

  .nav-main {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;       /* fallback */
    height: 100dvh;      /* respeta la barra del browser en mobile */
    background-color: var(--color-primary-dark);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding-top: calc(var(--header-height) + var(--space-8));
    padding-bottom: var(--space-8);
    padding-inline: var(--space-6);
    z-index: 850;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    overscroll-behavior: contain;
    pointer-events: none;
  }

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

  .nav-overlay {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    width: 100%;
  }

  .nav-link {
    font-size: var(--text-base);
    padding: var(--space-4) var(--space-4);
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-lg);
  }

  .nav-link:hover,
  .nav-link.active {
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.08);
  }

  /* En mobile el header siempre muestra el color de fondo */
  .site-header.is-scrolled .nav-link {
    color: rgba(255, 255, 255, 0.8);
  }

  .site-header.is-scrolled .nav-link:hover,
  .site-header.is-scrolled .nav-link.active {
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.08);
  }

  /* WhatsApp en menú mobile */
  .nav-list::after {
    content: '';
    display: block;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.1);
    margin-block: var(--space-4);
  }

  .header-actions .btn-whatsapp {
    display: none;
  }

  /* Botón cerrar menú mobile */
  .nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: calc((var(--header-height) - 40px) / 2);
    right: var(--space-4);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.85);
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

  .nav-close:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
  }
}

@media (max-width: 480px) {
  .header-actions {
    gap: var(--space-2);
  }
}