/* ═══════════════════════════════════════════
   BACK TO TOP — Gradient feel
   ═══════════════════════════════════════════ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--blue-600), var(--indigo));
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .3s, transform .3s, box-shadow .3s;
  box-shadow: 0 4px 16px rgba(99, 102, 241, .25);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  transform: none;
}

.back-to-top:hover {
  box-shadow: 0 8px 28px rgba(99, 102, 241, .35);
  transform: translateY(-2px);
}

.whatsapp-float {
  position: fixed;
  left: 2rem;
  bottom: 2rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: #25D366;
  border-radius: 50%;
  box-shadow: 0 10px 28px rgba(37, 211, 102, 0.32);
  z-index: 1000;
  transition: transform .25s, box-shadow .25s, background .25s;
}

.whatsapp-float:hover,
.whatsapp-float:focus-visible {
  background: #1ebe5d;
  box-shadow: 0 14px 34px rgba(37, 211, 102, 0.42);
  transform: translateY(-2px);
}

.whatsapp-float:focus-visible {
  outline: 3px solid rgba(37, 211, 102, 0.25);
  outline-offset: 4px;
}

@media (max-width: 480px) {
  .whatsapp-float {
    left: 1.25rem;
    bottom: 1.25rem;
    width: 48px;
    height: 48px;
  }
}