/* ==========================================================================
   nav.css — barra fija, hamburger en mobile, desplegable "Soluciones"
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 249, 252, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  height: var(--nav-h);
}

.nav__brand { display: inline-flex; align-items: center; flex: none; }
.nav__brand img { height: 45px; width: auto; }

/* Lista de navegación */
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  min-height: var(--tap);
  padding: 0 var(--sp-3);
  border-radius: var(--r-sm);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-small);
  color: var(--ink);
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.nav__link:hover { background: var(--bg-soft); }
.nav__link[aria-current="page"] { color: var(--cyan-ink); }
.nav__link[aria-current="page"]::after {
  content: ""; display: block;
}

/* Desplegable Soluciones */
.nav__dropdown { position: relative; }
.nav__dropdown-toggle .caret {
  width: 0.7em; height: 0.7em;
  transition: transform var(--dur-fast) var(--ease-out);
}
.nav__dropdown[data-open="true"] .caret { transform: rotate(180deg); }

.nav__panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 250px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  padding: var(--sp-2);
  display: none;
}
.nav__dropdown[data-open="true"] .nav__panel { display: block; }
.nav__panel a {
  display: block;
  padding: var(--sp-3);
  border-radius: var(--r-sm);
  font-weight: 800;
  font-size: var(--fs-small);
}
.nav__panel a small { display: block; color: var(--ink); font-weight: var(--fw-regular); font-size: 14px; }
.nav__panel a:hover { background: var(--cyan-bg); text-decoration: none; }

.nav__cta { flex: none; }

/* Botón hamburger */
.nav__toggle {
  display: none;
  width: var(--tap); height: var(--tap);
  align-items: center; justify-content: center;
  border-radius: var(--r-sm);
}
.nav__toggle .bars, .nav__toggle .bars::before, .nav__toggle .bars::after {
  content: "";
  display: block;
  width: 22px; height: 2.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.nav__toggle .bars { position: relative; }
.nav__toggle .bars::before { position: absolute; top: -7px; }
.nav__toggle .bars::after { position: absolute; top: 7px; }
.nav__toggle[aria-expanded="true"] .bars { background: transparent; }
.nav__toggle[aria-expanded="true"] .bars::before { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .bars::after { transform: translateY(-7px) rotate(-45deg); }

/* ---- Mobile ---- */
@media (max-width: 919px) {
  .nav__toggle { display: inline-flex; }

  /* backdrop-filter convierte al header en bloque contenedor de los position:fixed,
     y el menú fijo quedaría con la altura del header (casi 0). Lo quitamos en mobile
     para que el menú se posicione respecto al viewport y se vea completo. */
  .site-header {
    background: var(--bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav__menu {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: var(--sp-5) var(--gutter) var(--sp-8);
    background: var(--bg); /* fondo claro pleno, sin textura */
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--dur) var(--ease-out);
    visibility: hidden;
  }
  .nav__menu[data-open="true"] { transform: translateX(0); visibility: visible; }

  .nav__links { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .nav__link { min-height: 52px; padding: 0 var(--sp-3); font-size: var(--fs-lead); border-radius: var(--r-md); }

  .nav__dropdown { width: 100%; }
  .nav__panel {
    position: static;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0 0 var(--sp-3) var(--sp-5);
    min-width: 0;
  }
  .nav__panel a { font-size: var(--fs-body); }

  .nav__cta { margin-top: var(--sp-4); }
  .nav__cta .btn { width: 100%; }
}

/* Bloquea scroll de fondo cuando el menú está abierto */
body.is-menu-open { overflow: hidden; }