.whatsapp-float-button {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: linear-gradient(135deg, #25D366 0%, #1DA851 100%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
    z-index: 9999;
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
    text-decoration: none;
}

.whatsapp-float-button svg {
    width: 30px;
    height: 30px;
    display: block;
}

.whatsapp-float-button:hover,
.whatsapp-float-button:focus-visible {
    transform: scale(1.08);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.3);
    filter: brightness(1.03);
}

.whatsapp-float-button:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.75);
    outline-offset: 3px;
}

@media (max-width: 768px) {
    .whatsapp-float-button {
        right: 15px;
        bottom: 15px;
        width: 52px;
        height: 52px;
    }

    .whatsapp-float-button svg {
        width: 27px;
        height: 27px;
    }
}