.whatsapp-float {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25d366;
    color: #ffffff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
    z-index: 9999;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.whatsapp-float:focus,
.whatsapp-float:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.24);
}

.whatsapp-float:focus-visible {
    outline: 3px solid rgba(37, 211, 102, 0.5);
    outline-offset: 3px;
}

.whatsapp-icon {
    width: 28px;
    height: 28px;
    display: inline-flex;
}

.whatsapp-icon svg {
    width: 100%;
    height: 100%;
    display: block;
}

@media (max-width: 768px) {
    .whatsapp-float {
        width: 48px;
        height: 48px;
        right: 16px;
        bottom: 16px;
    }

    .whatsapp-icon {
        width: 24px;
        height: 24px;
    }
}

@media (prefers-reduced-motion: no-preference) {
    .whatsapp-float::after {
        content: "";
        position: absolute;
        inset: 0;
        border-radius: 50%;
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.45);
        animation: whatsapp-pulse 2.2s infinite;
    }
}

@keyframes whatsapp-pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.45);
    }
    70% {
        transform: scale(1.1);
        box-shadow: 0 0 0 14px rgba(37, 211, 102, 0);
    }
    100% {
        transform: scale(1.1);
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}