/* ===== Контакт-FAB: круглая кнопка быстрого диалога, правый-низ, на всех экранах ===== */
.contact-fab{
  position:fixed; right:16px; bottom:calc(20px + var(--safe-b)); z-index:48;
  width:54px; height:54px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  background:radial-gradient(circle at 50% 34%, color-mix(in srgb, var(--bordeaux) 72%, #000), #0a0709);
  border:1.5px solid var(--neon); color:#fff; cursor:pointer;
  box-shadow:0 0 18px color-mix(in srgb, var(--neon) 35%, transparent),
             inset 0 0 10px color-mix(in srgb, var(--neon) 18%, transparent);
  transition:transform .15s ease, box-shadow .3s ease, border-color .35s ease;
}
.contact-fab:active{ transform:scale(.92); }
.contact-fab-ic{
  position:relative; z-index:1; font-size:22px; line-height:1;
  color:var(--neon-soft); text-shadow:0 0 8px var(--neon);
}
.contact-fab-pulse{
  position:absolute; inset:-1.5px; border-radius:50%;
  border:1.5px solid var(--neon); opacity:.55; animation:fabPulse 2.4s ease-out infinite;
}
@keyframes fabPulse{ 0%{transform:scale(1);opacity:.5} 70%{transform:scale(1.5);opacity:0} 100%{opacity:0} }
@media (prefers-reduced-motion:reduce){ .contact-fab-pulse{animation:none;opacity:0} }