/* === transizione stabile pagina (NO su html!) === */
html.swipe-nav-anim #swipe-page { transition: transform 220ms ease; }
html.swipe-nav-exit #swipe-page { transform: translateX(-18px); }
html.swipe-nav-enter #swipe-page { transform: translateX(18px); }

/* IMPORTANTISSIMO: html non deve diventare trasparente */
html.swipe-nav-exit,
html.swipe-nav-enter { opacity: 1; }


@view-transition {
  navigation: auto;
}

@media (prefers-reduced-motion: reduce) {
  html.swipe-nav-anim { transition: none !important; }
}

/* === "feel" swipe: pannello che segue il dito === */
#swipe-hint {
  position: fixed;
  top: 0; bottom: 0;
  width: min(64vw, 420px);
  pointer-events: none;
  z-index: 1100;
  opacity: 0;
  transform: scaleX(0);
  transition: opacity 140ms ease, transform 180ms ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

#swipe-hint.active {
  opacity: 1;
}

#swipe-hint[data-side="right"] {
  right: 0;
  transform-origin: right center;
  background: linear-gradient(to left,
    rgba(255,255,255,0.14),
    rgba(255,255,255,0.00)
  );
}

#swipe-hint[data-side="left"] {
  left: 0;
  transform-origin: left center;
  background: linear-gradient(to right,
    rgba(255,255,255,0.14),
    rgba(255,255,255,0.00)
  );
}

/* freccina leggera (opzionale) */
#swipe-hint::after {
  content: "›";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 42px;
  line-height: 1;
  opacity: 0.55;
}

#swipe-hint[data-side="right"]::after { left: 18px; }
#swipe-hint[data-side="left"]::after  { right: 18px; transform: translateY(-50%) rotate(180deg); }