/* =========================================================================
   nav-groups.css — Grupos con dropdown para la nav principal.
   Se aplica sobre la nav existente (nav.top + .nav-links) de cada página.
   Desktop: dropdowns hover/click. Mobile (<=900px): acordeones dentro del
   hamburguesa.
   ========================================================================= */

/* Desktop ================================================================= */
.nav-group { position: relative; display: inline-flex; align-items: center; }
.nav-group-trigger {
  background: none; border: 0; cursor: pointer; padding: 0; margin: 0;
  color: #b8c4d4; font-family: 'Inter', sans-serif; font-size: .82rem;
  letter-spacing: .15em; font-weight: 600; text-transform: uppercase;
  transition: color .3s;
  display: inline-flex; align-items: center; gap: .4rem;
  line-height: 1.4;
}
.nav-group-trigger:hover,
.nav-group-trigger[aria-expanded="true"],
.nav-group.has-active .nav-group-trigger { color: var(--azul-br, #6fc4e0); }
.nav-group-trigger .caret { font-size: .6rem; transition: transform .2s; line-height: 1; opacity: .75; }
.nav-group-trigger[aria-expanded="true"] .caret { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute; top: calc(100% + 1.25rem); left: 50%;
  transform: translateX(-50%);
  background: rgba(8,10,14,.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.08);
  padding: .5rem 0; min-width: max-content;
  display: none; flex-direction: column;
  box-shadow: 0 10px 30px rgba(0,0,0,.5);
}
/* Puente invisible para que el hover no se pierda al pasar del trigger al dropdown */
.nav-dropdown::before {
  content: ""; position: absolute;
  top: -1.25rem; left: 0; right: 0; height: 1.25rem;
}
.nav-group-trigger[aria-expanded="true"] + .nav-dropdown,
.nav-group:hover .nav-dropdown { display: flex; }
.nav-dropdown a {
  color: #b8c4d4; font-family: 'Inter', sans-serif; font-size: .76rem;
  letter-spacing: .14em; font-weight: 500; text-transform: uppercase;
  text-decoration: none;
  padding: .6rem 1.6rem; white-space: nowrap;
  transition: color .2s, background .2s;
  border-bottom: 0;
}
.nav-dropdown a:hover, .nav-dropdown a.active {
  color: var(--azul-br, #6fc4e0); background: rgba(74,158,187,.08);
}

/* Mobile ================================================================== */
@media (max-width: 900px) {
  .nav-group { width: 100%; }
  .nav-group-trigger {
    width: 100%; padding: .85rem 0;
    font-size: 1.05rem; letter-spacing: .12em;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,.06);
  }
  .nav-dropdown {
    position: static; transform: none;
    background: transparent; border: 0; box-shadow: none;
    padding: 0 0 .3rem 1rem; min-width: 0;
  }
  .nav-group:hover .nav-dropdown { display: none; }
  .nav-group-trigger[aria-expanded="true"] + .nav-dropdown { display: flex; }
  .nav-dropdown a {
    padding: .65rem 0; font-size: .95rem; letter-spacing: .1em;
    border-bottom: 1px solid rgba(255,255,255,.04);
    white-space: normal;
  }
  .nav-dropdown a:last-child { border-bottom: none; }
}
@media (max-width: 900px) and (max-height: 640px) {
  .nav-group-trigger { font-size: .95rem; padding: .7rem 0; }
  .nav-dropdown a { font-size: .88rem; padding: .55rem 0; }
}