.whatsapp-float {
  position: fixed;
  right: max(24px, env(safe-area-inset-right));
  bottom: calc(88px + env(safe-area-inset-bottom));
  z-index: 60;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(145deg, #20ce70, #087e42);
  box-shadow: 0 6px 24px rgba(14,171,88,.4), inset 0 1px 0 rgba(255,255,255,.25);
  transition: transform .25s ease, box-shadow .25s ease;
  -webkit-tap-highlight-color: transparent;
}
.whatsapp-float::before {
  content: "";
  position: absolute;
  inset: -1px;
  border: 2px solid rgba(37,211,102,.55);
  border-radius: inherit;
  animation: whatsapp-pulse 2.8s ease-out infinite;
  pointer-events: none;
}
.whatsapp-float svg { width: 29px; height: 29px; fill: currentColor; }
.whatsapp-float:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(14,171,88,.55); }
.whatsapp-float:focus-visible { outline: 3px solid #60a5fa; outline-offset: 5px; }
.whatsapp-float-label {
  position: absolute;
  right: calc(100% + 14px);
  padding: 9px 13px;
  border: 1px solid var(--border2, #334155);
  border-radius: 10px;
  background: var(--bg2, #101827);
  color: var(--txt, #fff);
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(5px);
  transition: opacity .2s ease, transform .2s ease;
  pointer-events: none;
}
.whatsapp-float:hover .whatsapp-float-label,
.whatsapp-float:focus-visible .whatsapp-float-label { opacity: 1; transform: translateX(0); }
@keyframes whatsapp-pulse {
  0% { transform: scale(1); opacity: .65; }
  75%, 100% { transform: scale(1.4); opacity: 0; }
}
@media (max-width: 640px) {
  .whatsapp-float { right: max(20px, env(safe-area-inset-right)); width: 52px; height: 52px; }
}
@media (prefers-reduced-motion: reduce) {
  .whatsapp-float::before { animation: none; }
  .whatsapp-float, .whatsapp-float-label { transition: none; }
}