/* ===== SOCIAL FLOAT (WHATSAPP / INSTAGRAM / YOUTUBE) ===== */
.social-float{
  position: fixed;
  right: 16px;
  z-index: 9999;

  width: 44px;
  height: 44px;
  border-radius: 999px;

  display: grid;
  place-items: center;

  color: #fff;
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: 0 10px 26px rgba(0,0,0,.40);

  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}

.social-float:hover{
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 14px 34px rgba(0,0,0,.50);
  filter: brightness(1.05);
}

/* Stack (de abajo hacia arriba) */
.social-float--youtube   { bottom: 18px;  background: var(--brand-red); }
.social-float--instagram { bottom: 72px;  background: radial-gradient(circle at 30% 110%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%); }
.social-float--whatsapp  { bottom: 126px; background: #25D366; }

/* Pulso suave solo para WhatsApp */
.social-float--whatsapp::after{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: rgba(37,211,102,.35);
  animation: social-pulse 2.2s infinite;
  z-index: -1;
}

@keyframes social-pulse{
  0%{ transform: scale(1); opacity: .55; }
  70%{ transform: scale(1.7); opacity: 0; }
  100%{ opacity: 0; }
}

/* Mobile */
@media (max-width: 768px){
  .social-float{
    width: 40px;
    height: 40px;
    right: 12px;
  }

  .social-float--youtube   { bottom: 16px; }
  .social-float--instagram { bottom: 64px; }
  .social-float--whatsapp  { bottom: 112px; }
}