.mk-floating-contact {
    position: fixed;
    bottom: 90px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 9999;
}
.mk-floating-contact a {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    transition: transform 0.3s ease;
    position: relative;
}
.mk-floating-contact a:hover { transform: scale(1.1); }
.mk-floating-contact img { width: 30px; height: 30px; object-fit: contain; }
.mk-btn-zalo { background-color: #fff; }
.mk-btn-messenger { background-color: #fff; }

@keyframes mk-pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
}

@media (max-width: 768px) {
    .mk-floating-contact { bottom: 20px; right: 20px; gap: 10px; }
    .mk-floating-contact a { width: 45px; height: 45px; }
    .mk-floating-contact img { width: 26px; height: 26px; }
}