.messenger-chat-btn {
    position: fixed;
    bottom: 40px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #00B2FF, #006AFF);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 178, 255, 0.4);
    z-index: 1000;
    
}

.messenger-chat-btn svg {
    width: 45px;
    height: 45px;
    fill: white;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.messenger-chat-btn::before {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
}


@media (max-width: 768px) {
    .messenger-chat-btn {
        content: "";
        bottom: 30px;
        right: 30px;
        width: 50px;
        height: 50px;
    }
    
    .messenger-chat-btn svg {
        width: 40px;
        height: 40px;
    }
}


.fanpage-facebook-btn {
    position: fixed;
    bottom: 120px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #00B2FF, #006AFF);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 178, 255, 0.4);
    z-index: 1000;
}


.fanpage-facebook-btn svg {
    width: 45px;
    height: 45px;
    fill: white;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.fanpage-facebook-btn::before {
    content: "Fanpage Thư viện";
    position: absolute;
    bottom: 70px;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

@media (max-width: 768px) {
    .fanpage-facebook-btn {
        content: "";
        bottom: 87px;
        right: 30px;
        width: 50px;
        height: 50px;
    }
    
    .fanpage-facebook-btn svg {
        width: 40px;
        height: 40px;
    }
}