.mwc-float {
  --mwc-size: 60px;
  align-items: center;
  background: #25d366;
  border: 0;
  border-radius: 50%;
  bottom: max(24px, env(safe-area-inset-bottom));
  box-shadow: 0 8px 28px rgba(0, 0, 0, .2);
  color: #fff;
  display: flex;
  height: var(--mwc-size);
  justify-content: center;
  position: fixed;
  text-decoration: none;
  transform: translateZ(0);
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
  width: var(--mwc-size);
  z-index: 99999;
}

.mwc-float--right { right: max(24px, env(safe-area-inset-right)); }
.mwc-float--left { left: max(24px, env(safe-area-inset-left)); }

.mwc-float svg {
  display: block;
  height: 56%;
  width: 56%;
}

.mwc-float:hover {
  background: #20bd5a;
  box-shadow: 0 12px 34px rgba(0, 0, 0, .26);
  color: #fff;
  transform: translateY(-3px) scale(1.04);
}

.mwc-float:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px #128c7e, 0 12px 34px rgba(0, 0, 0, .26);
}

@media (max-width: 600px) {
  .mwc-float { bottom: max(18px, env(safe-area-inset-bottom)); }
  .mwc-float--right { right: max(18px, env(safe-area-inset-right)); }
  .mwc-float--left { left: max(18px, env(safe-area-inset-left)); }
}

@media (prefers-reduced-motion: reduce) {
  .mwc-float { transition: none; }
}