.whatsapp-float{position:fixed;right:22px;bottom:22px;z-index:20;display:grid;width:58px;height:58px;place-items:center;border-radius:50%;background:#25d366;box-shadow:0 14px 34px rgb(0 0 0 / 34%);transition:transform .2s,box-shadow .2s,background .2s}.whatsapp-float:hover{transform:translateY(-2px);background:#20bf5a;box-shadow:0 18px 38px rgb(0 0 0 / 38%)}.whatsapp-float:focus-visible{outline:3px solid #fff;outline-offset:3px;box-shadow:0 0 0 6px #1267e8,0 14px 34px rgb(0 0 0 / 34%)}.whatsapp-float img{display:block;width:28px;height:28px;object-fit:contain}@media (max-width:760px){.whatsapp-float{right:18px;bottom:calc(18px + env(safe-area-inset-bottom));width:56px;height:56px}}@media (prefers-reduced-motion:reduce){.whatsapp-float{transition:none}.whatsapp-float:hover{transform:none}}

/* O SVG fornecido é verde; o filtro preserva o asset e o torna branco sobre o botão oficial. */
.whatsapp-float img{filter:brightness(0) invert(1)}