/* ==========================================================================
   HEADER-FOOTER.CSS
   Header completo (logo, navegación con submenús, CTA, menú mobile) y
   Footer completo. Único archivo de layout permitido en esta entrega
   (las secciones de contenido del <main> se agregan en próximas
   entregas, cada una en su propio archivo CSS).
   ========================================================================== */

/* ==========================================================================
   HEADER
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  display: flex;
  align-items: center;
  background-color: var(--qa-navy-950);
  color: var(--color-text-inverse);
  border-bottom: 1px solid var(--qa-navy-700);
  transition: box-shadow var(--duration-base) var(--ease-standard);
}

/* Estado aplicado por main.js al hacer scroll — separa visualmente
   el header del contenido una vez que deja de estar en el tope */
.site-header.is-scrolled {
  box-shadow: var(--elevation-2);
}

@media (max-width: 1023.98px) {
  .site-header {
    height: var(--header-height-mobile);
  }
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  height: 100%;
}

/* --- Logo --------------------------------------------------------------- */

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);       /* +≈30% respecto a --text-lg (Entrega 2) */
  font-weight: var(--weight-semibold);
  color: var(--color-text-inverse);
  flex-shrink: 0;
}

.site-logo__mark {
  width: 44px;                     /* antes 34px — mismo incremento (+29%) */
  height: 44px;
  flex-shrink: 0;
}

.site-logo__text-primary {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  line-height: 1;
}

/* Etiqueta "TEC" — evolución de marca (ver punto 9, aprobación de
   Entrega 2): se integra al lockup del nombre en vez de reemplazarlo,
   preservando el reconocimiento visual ya construido de "Quimic Aseo". */
.site-logo__tec-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: var(--weight-medium);
  letter-spacing: 0.06em;
  color: var(--qa-navy-950);
  background-color: var(--qa-cyan-300);
  border-radius: var(--radius-sm);
  transform: translateY(-1px);
}

.site-logo__text-secondary {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: var(--weight-regular);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qa-cyan-300);
  line-height: 1.2;
  margin-top: 2px;
}

/* --- Navegación principal (desktop) -------------------------------------- */

.main-nav {
  display: none; /* se activa en el breakpoint desktop, ver media query abajo */
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.main-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--qa-steel-200);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard);
}

.main-nav__link:hover,
.main-nav__link[aria-expanded="true"] {
  color: var(--color-text-inverse);
  background-color: rgba(255, 255, 255, 0.06);
}

.main-nav__link .icon {
  width: 0.85rem;
  height: 0.85rem;
  transition: transform var(--duration-fast) var(--ease-standard);
}

.main-nav__link[aria-expanded="true"] .icon {
  transform: rotate(180deg);
}

/* --- Submenú desplegable (dropdown) --------------------------------------
   Cada item de navegación con submenú es un <li class="has-dropdown">
   que contiene un botón (main-nav__link) y un panel (.dropdown-panel).
   El JS (nav.js) controla apertura/cierre y aria-expanded; el CSS
   controla exclusivamente la presentación visual del estado abierto. */

.has-dropdown {
  position: relative;
}

.dropdown-panel {
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 260px;
  padding: var(--space-3);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard),
              visibility 0s linear var(--duration-fast);
}

.has-dropdown[data-open="true"] .dropdown-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition: opacity var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard),
              visibility 0s linear 0s;
}

.dropdown-panel__link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: background-color var(--duration-fast) var(--ease-standard);
}

.dropdown-panel__link:hover {
  background-color: var(--qa-paper-100);
}

.dropdown-panel__link-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}

.dropdown-panel__link-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --- Zona derecha: CTA + botón mobile ------------------------------------ */

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__cta {
  display: none; /* aparece desde el breakpoint desktop */
}

/* --- Botón de menú mobile (hamburguesa) ---------------------------------- */

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text-inverse);
  border-radius: var(--radius-sm);
}

.nav-toggle:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-toggle .icon--close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon--menu {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon--close {
  display: block;
}

/* --- Panel de navegación mobile ------------------------------------------
   Panel a pantalla completa que se activa con .nav-toggle. Contiene
   la misma información que main-nav, en formato acordeón. */

.mobile-nav {
  position: fixed;
  inset: var(--header-height-mobile) 0 0 0;
  z-index: var(--z-mobile-nav);
  background-color: var(--qa-navy-950);
  overflow-y: auto;
  padding: var(--space-6) var(--container-pad) var(--space-9);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-standard);
}

.mobile-nav[data-open="true"] {
  transform: translateX(0);
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-text-inverse);
  border-bottom: 1px solid var(--qa-navy-700);
}

.mobile-nav__link .icon {
  transition: transform var(--duration-fast) var(--ease-standard);
}

.mobile-nav__item[data-open="true"] .mobile-nav__link .icon {
  transform: rotate(180deg);
}

/* Submenú acordeón dentro del panel mobile */
.mobile-nav__submenu {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-base) var(--ease-standard);
}

.mobile-nav__item[data-open="true"] .mobile-nav__submenu {
  grid-template-rows: 1fr;
}

.mobile-nav__submenu-inner {
  overflow: hidden;
}

.mobile-nav__sublink {
  display: block;
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-5);
  font-size: var(--text-base);
  color: var(--qa-steel-200);
  border-bottom: 1px solid var(--qa-navy-700);
}

.mobile-nav__cta {
  margin-top: var(--space-6);
  width: 100%;
}

/* Bloquea el scroll del body cuando el panel mobile está abierto
   (clase agregada/quitada por nav.js) */
body.nav-open {
  overflow: hidden;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  background-color: var(--qa-navy-950);
  color: var(--qa-steel-200);
  padding-block: var(--space-9) var(--space-6);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--qa-navy-700);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 320px;
}

.site-footer__brand .site-logo {
  color: var(--color-text-inverse);
}

.site-footer__tagline {
  font-size: var(--text-sm);
  color: var(--qa-steel-200); /* footer es fondo oscuro: texto secundario claro, no --qa-steel-400 (que ahora es oscuro para fondos claros) */
  line-height: var(--leading-normal);
}

/* Estructura de contacto corporativo por área — Gerencia General,
   Comercial, Ingeniería, Contacto General. Se usa en el footer de
   todas las páginas; la página de Contacto (entrega futura) reutiliza
   los mismos datos, no una copia distinta. */
.site-footer__org-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--qa-navy-700);
}

.site-footer__org-contact li {
  display: flex;
  flex-direction: column;
  gap: 1px;
  font-size: var(--text-xs);
}

.site-footer__org-role {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--qa-cyan-300);
}

.site-footer__org-contact a {
  color: var(--qa-steel-200);
  transition: color var(--duration-fast) var(--ease-standard);
}

.site-footer__org-contact a:hover {
  color: var(--color-text-inverse);
}

.site-footer__nav-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.footer-nav-group__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--qa-cyan-300);
  margin-bottom: var(--space-4);
}

.footer-nav-group__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-group__link {
  font-size: var(--text-sm);
  color: var(--qa-steel-200);
  transition: color var(--duration-fast) var(--ease-standard);
}

.footer-nav-group__link:hover {
  color: var(--color-text-inverse);
}

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--qa-steel-200); /* footer es fondo oscuro: texto secundario claro, no --qa-steel-400 (que ahora es oscuro para fondos claros) */
}

.site-footer__bottom-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-footer__contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.site-footer__contact a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--qa-steel-200);
  transition: color var(--duration-fast) var(--ease-standard);
}

.site-footer__contact a:hover {
  color: var(--color-text-inverse);
}

/* ==========================================================================
   RESPONSIVE — HEADER Y FOOTER
   Breakpoint desktop en 1024px: por debajo, navegación mobile;
   desde ahí, navegación horizontal completa. Ver variables.css §8.
   ========================================================================== */

@media (min-width: 1024px) {

  .main-nav {
    display: block;
  }

  .site-header__cta {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .mobile-nav {
    display: none;
  }

  .site-footer__top {
    grid-template-columns: 320px 1fr;
  }

  .site-footer__nav-groups {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 480px) and (max-width: 1023.98px) {
  .site-footer__nav-groups {
    grid-template-columns: repeat(2, 1fr);
  }
}