/* ==========================================================================
   fortizb · layout.css
   Estructura global: cabecera fija, navegación (escritorio y móvil) y pie.
   ========================================================================== */

/* --- Cabecera ------------------------------------------------------------ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 16, 35, 0.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.header.is-scrolled {
  background: rgba(0, 11, 24, 0.95);
  border-bottom-color: var(--line-strong);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  height: var(--header-h);
}

.header__cta {
  flex: none;
}

/* --- Navegación --------------------------------------------------------- */
.nav {
  margin-left: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.15rem, 0.1rem + 0.6vw, 0.7rem);
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.5rem 0.7rem;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: var(--fw-medium);
  transition: color var(--dur) var(--ease);
}

.nav__num {
  color: rgba(166, 166, 166, 0.55);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
}

.nav__link::after {
  content: "";
  position: absolute;
  right: 0.7rem;
  bottom: 0.22rem;
  left: 0.7rem;
  height: 1px;
  background: var(--c-white);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.nav__link:hover {
  color: var(--text-body);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__link[aria-current="true"] {
  color: var(--c-white);
}

.nav__link[aria-current="true"]::after {
  transform: scaleX(1);
  background: var(--c-gray);
}

.nav__link[aria-current="true"] .nav__num {
  color: var(--c-gray);
}

/* Botón de menú (solo móvil) */
.nav-toggle {
  display: none;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text-body);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--line-strong);
  color: var(--c-white);
}

.nav-toggle .icon {
  width: 20px;
  height: 20px;
}

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

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

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

.nav__mobile-cta {
  display: none;
}

/* --- Pie ----------------------------------------------------------------- */
.footer {
  padding-block: clamp(2.75rem, 2rem + 3vw, 4rem) var(--sp-6);
  background: rgba(0, 0, 0, 0.28);
  border-top: 1px solid var(--line);
}

.footer__top {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6) var(--sp-8);
  align-items: flex-start;
  justify-content: space-between;
}

.footer__identity {
  display: grid;
  gap: var(--sp-3);
  max-width: 22rem;
}

.footer__name {
  color: var(--c-white);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
}

.footer__role {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer__nav-title {
  margin-bottom: var(--sp-4);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer__nav-list {
  display: grid;
  gap: 0.6rem;
}

.footer__nav-list a {
  color: var(--text-body);
  font-size: var(--fs-sm);
  transition: color var(--dur) var(--ease);
}

.footer__nav-list a:hover {
  color: var(--c-white);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  align-items: center;
  justify-content: space-between;
  margin-top: clamp(2.25rem, 1.5rem + 2.5vw, 3.5rem);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: var(--fs-xs);
}

.footer__legal {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color var(--dur) var(--ease);
}

.back-to-top .icon {
  width: 14px;
  height: 14px;
  transform: rotate(-90deg);
  transition: transform var(--dur) var(--ease);
}

.back-to-top:hover {
  color: var(--c-white);
}

.back-to-top:hover .icon {
  transform: rotate(-90deg) translateX(-3px);
}

/* --- Responsive de cabecera y pie --------------------------------------- */
@media (max-width: 1080px) {
  .nav__num {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .brand__mark {
    height: 30px;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: grid;
    margin-left: auto;
  }

  .brand__mark {
    height: 26px;
  }

  .header__inner {
    gap: var(--sp-4);
  }

  .nav {
    position: absolute;
    top: var(--header-h);
    right: 0;
    left: 0;
    margin: 0;
    padding: 0.6rem var(--gutter) 1.5rem;
    background: rgba(0, 11, 24, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -30px rgba(0, 0, 0, 1);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }

  .nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__link {
    width: 100%;
    padding: 0.95rem 0.4rem;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    font-size: 1rem;
  }

  .nav__link::after {
    display: none;
  }

  .nav__link[aria-current="true"] {
    box-shadow: inset 2px 0 0 0 var(--c-gray);
  }

  .nav__num {
    display: inline;
  }

  .nav__mobile-cta {
    display: block;
    margin-top: var(--sp-5);
  }

  .footer__top {
    flex-direction: column;
    gap: var(--sp-7);
  }
}

@media (max-width: 520px) {
  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-4);
  }
}