/* ======= Estilos do botão ======= */
.wa-fab {
    --wa-size: 56px;
    --wa-bg: #25D366;
    --wa-shadow: 0 6px 18px rgba(37,211,102,0.25);
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: var(--wa-size);
    height: var(--wa-size);
    border-radius: 50%;
    display: inline-grid;
    place-items: center;
    box-shadow: var(--wa-shadow);
    background: var(--wa-bg);
    cursor: pointer;
    z-index: 9999;
    transition: transform .18s ease, box-shadow .18s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
  .wa-fab.left { right: auto; left: 24px; }
  .wa-fab:active { transform: scale(.94); }
  .wa-fab:focus { outline: 3px solid rgba(0,0,0,.12); outline-offset: 2px; }
  
  .wa-icon {
    width: 60%;
    height: 60%;
    fill: white;
    display: block;
    pointer-events: none;
  }
  
  /* pulso sutil */
  .wa-fab.pulse::after{
    content: "";
    position:absolute;
    left:50%; top:50%;
    transform:translate(-50%,-50%);
    width: 100%;
    height: 100%;
    border-radius:50%;
    animation: waPulse 2.6s infinite;
    box-shadow: 0 0 0 0 rgba(37,211,102,0.15);
  }
  @keyframes waPulse {
    0% { transform: translate(-50%,-50%) scale(1); opacity: .8; }
    70% { transform: translate(-50%,-50%) scale(1.9); opacity: 0; }
    100% { transform: translate(-50%,-50%) scale(2); opacity: 0; }
  }
  
  /* opções responsivas: esconda em telas grandes, se desejado */
  @media (min-width: 900px) {
    .wa-fab.hide-desktop { display: none !important; }
  }
  @media (max-width: 420px) {
    .wa-fab { --wa-size: 64px; } /* botão maior em mobiles pequenos */
  }