/* Navegación del sitio.
   Portada: un solo menú con sus secciones; desde ella se llega a todas las páginas.
   Páginas internas: el menú va vacío y la barra (.subnav) trae Volver, la ubicación
   y las secciones de esa página. */

.nav-links.is-empty ~ .nav-actions-wrap .nav-toggle { display: none; }

.nav-links a { white-space: nowrap; }
.nav-links a[aria-current="page"] { color: var(--ink, #12233E); font-weight: 600; position: relative; }

@media (min-width: 961px) {
  .nav-links a[aria-current="page"]::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: -8px; height: 2px;
    background: var(--cyan, #009ACE);
  }
}

.subnav {
  position: sticky; top: var(--nav-h, 73px); z-index: 40;
  background: rgba(244, 244, 240, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule, rgba(18, 35, 62, 0.10));
}

.subnav-inner {
  max-width: var(--w-page, 1180px); margin: 0 auto; padding: 0 2rem;
  display: flex; align-items: center; gap: 1.75rem;
  min-height: 2.75rem; overflow-x: auto; white-space: nowrap; scrollbar-width: none;
}
.subnav-inner::-webkit-scrollbar { display: none; }

.subnav-back {
  display: inline-flex; align-items: center; gap: 0.45rem; flex: none;
  padding: 0.35rem 0.8rem; border: 1px solid var(--ink, #12233E); border-radius: 2px;
  font-size: 0.78rem; font-weight: 600; color: var(--ink, #12233E); text-decoration: none;
  transition: background 120ms cubic-bezier(0.16, 1, 0.3, 1), color 120ms cubic-bezier(0.16, 1, 0.3, 1);
}
.subnav-back:hover { background: var(--ink, #12233E); color: var(--paper, #FAFAF7); }
/* el botón de volver va lleno y late siempre, para que se vea a primera vista */
.subnav-back { background: var(--ink, #12233E); color: var(--paper, #FAFAF7); animation: subnav-latido 1.8s cubic-bezier(0.16, 1, 0.3, 1) infinite; }
.subnav-back:hover { background: var(--cyan, #009ACE); border-color: var(--cyan, #009ACE); color: var(--paper, #FAFAF7); }
@keyframes subnav-latido {
  0% { box-shadow: 0 0 0 0 rgba(0, 154, 206, 0.75); }
  70% { box-shadow: 0 0 0 9px rgba(0, 154, 206, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 154, 206, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .subnav-back { animation: none; box-shadow: 0 0 0 3px rgba(0, 154, 206, 0.35); }
}

.subnav-crumb {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: 'JetBrains Mono', monospace; font-size: 0.66rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate, #6B7280);
}
.subnav-crumb a { color: inherit; text-decoration: none; }
.subnav-crumb a:hover { color: var(--cyan, #009ACE); }
.subnav-crumb strong { color: var(--ink, #12233E); font-weight: 500; }

.subnav-links { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; }
.subnav-crumb + .subnav-links { padding-left: 1.75rem; border-left: 1px solid var(--rule-strong, rgba(18, 35, 62, 0.18)); }
.subnav-links a {
  display: block; padding: 0.8rem 0; font-size: 0.8rem; font-weight: 500;
  color: var(--graphite, #2C3340); text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 120ms cubic-bezier(0.16, 1, 0.3, 1), border-color 120ms cubic-bezier(0.16, 1, 0.3, 1);
}
.subnav-links a:hover { color: var(--cyan, #009ACE); }
.subnav-links a.is-active { color: var(--ink, #12233E); border-bottom-color: var(--cyan, #009ACE); }

.subnav-sib {
  margin-left: auto; font-size: 0.8rem; font-weight: 600;
  color: var(--cyan, #009ACE); text-decoration: none;
}
.subnav-sib:hover { color: var(--ink, #12233E); }

section[id], [id="paragon-acquisition"] { scroll-margin-top: calc(var(--nav-h, 73px) + 3.5rem); }

@media (max-width: 760px) {
  .subnav-inner { padding: 0 1.2rem; gap: 1.2rem; }
  .subnav-crumb a, .subnav-crumb span { display: none; }
  .subnav-sib { display: none; }
}

/* Entrada y salida de cada sección al hacer scroll.
   Se anima el contenido, no el fondo, para que los cambios de color no parpadeen. */
html.sx-on .sx {
  opacity: 0; transform: translateY(28px);
  transition: opacity 420ms cubic-bezier(0.16, 1, 0.3, 1), transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
html.sx-on .sx.sx-above { transform: translateY(-20px); }
html.sx-on .sx.sx-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html.sx-on .sx { opacity: 1; transform: none; transition: none; }
}

/* Transición entre páginas.
   Al entrar: un telón Ink con el logo cubre la pantalla y se levanta.
   Al salir: el mismo telón sube desde abajo, y la página nueva continúa el movimiento. */
.pt {
  position: fixed; inset: 0; z-index: 1000; pointer-events: none;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.4rem;
  background: #12233E;
  transform: translateY(-101%);
  animation: pt-reveal 950ms cubic-bezier(0.76, 0, 0.24, 1) both;
}
.pt-logo {
  width: 180px; height: 62px; background: #FAFAF7;
  -webkit-mask: url('logo_white.png') center / contain no-repeat;
          mask: url('logo_white.png') center / contain no-repeat;
  animation: pt-logo-out 950ms ease both;
}
.pt-line { position: relative; width: 150px; height: 2px; overflow: hidden; background: rgba(167, 220, 238, 0.22); }
.pt-line::after {
  content: ''; position: absolute; inset: 0; background: #009ACE;
  transform: scaleX(0); transform-origin: left;
  animation: pt-fill 420ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes pt-reveal { 0%, 42% { transform: translateY(0); } 100% { transform: translateY(-101%); } }
@keyframes pt-logo-out { 0%, 45% { opacity: 1; transform: none; } 75%, 100% { opacity: 0; transform: translateY(-14px); } }
@keyframes pt-fill { to { transform: scaleX(1); } }

html.pt-leaving .pt { pointer-events: auto; animation: pt-cover 430ms cubic-bezier(0.76, 0, 0.24, 1) both; }
html.pt-leaving .pt-logo { animation: pt-logo-in 300ms 160ms ease both; }
html.pt-leaving .pt-line::after { animation: none; }
@keyframes pt-cover { from { transform: translateY(101%); } to { transform: translateY(0); } }
@keyframes pt-logo-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) { .pt { display: none; } }