.botao-whatsapp {
    position: fixed;
    right: var(--espaco-3);
    bottom: var(--espaco-3);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cor-branco);
    border-radius: 50%;
    box-shadow: var(--sombra-card-hover);
    z-index: 400;
    transition: transform var(--transicao-padrao);
}

.botao-whatsapp:hover {
    transform: scale(1.06);
}