.sg-whatsapp {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 400;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background-color: #25D366;
    color: var(--warm-white);
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
    transition: all var(--duration-sm) var(--ease-out);
}

.sg-whatsapp:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.45);
}

@media (max-width: 768px) {
    .sg-whatsapp {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
}