#sem-whatsapp-pulse {
    position: fixed;
    right: calc(24px + env(safe-area-inset-right, 0px));
    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    box-sizing: border-box;
    padding: 14px;
    border: 0;
    border-radius: 50%;
    background: #25d366;
    color: #fff;
    text-decoration: none;
    box-shadow: 0 5px 18px rgb(0 0 0 / 22%);
    isolation: isolate;
    transition: background-color .2s ease, transform .2s ease;
    -webkit-tap-highlight-color: transparent;
}
#sem-whatsapp-pulse::before,
#sem-whatsapp-pulse::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    border: 2px solid #25d366;
    border-radius: inherit;
    pointer-events: none;
    animation: sem-wap-pulse 2.4s ease-out infinite;
}
#sem-whatsapp-pulse::after { animation-delay: 1.2s; }
#sem-whatsapp-pulse svg { display: block; width: 100%; height: 100%; fill: currentColor; }
#sem-whatsapp-pulse:hover { background: #128c4a; color: #fff; transform: translateY(-2px); }
#sem-whatsapp-pulse:focus-visible { outline: 3px solid #123d29; outline-offset: 5px; }
@keyframes sem-wap-pulse {
    0% { transform: scale(1); opacity: .6; }
    100% { transform: scale(1.65); opacity: 0; }
}
@media (max-width: 600px) {
    #sem-whatsapp-pulse {
        width: 56px;
        height: 56px;
        right: calc(20px + env(safe-area-inset-right, 0px));
        bottom: calc(20px + env(safe-area-inset-bottom, 0px));
    }
}
@media (prefers-reduced-motion: reduce) {
    #sem-whatsapp-pulse { transition: none; }
    #sem-whatsapp-pulse::before, #sem-whatsapp-pulse::after { animation: none; display: none; }
}