.youtube-mute-toggle {
    position: fixed;
    bottom: 85px;
    right: 25px;
    z-index: 9999;
    display: none; /* Ẩn mặc định, sẽ hiển thị khi có video YouTube */
}

.mute-btn {
    background: rgba(0, 0, 0, 0.65);
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 10px rgba(255,255,255,.15);
}

.mute-btn:hover, .mute-btn:focus {
    background: rgba(196, 132, 42, 0.65);
}

.mute-btn svg {
    fill: #fff;
    width: 24px;
    height: 24px;
}

.mute-btn.muted .mute-icon {
    display: block;
}

.mute-btn.muted .unmute-icon {
    display: none;
}

.mute-btn.unmuted .mute-icon {
    display: none;
}

.mute-btn.unmuted .unmute-icon {
    display: block !important;
}

/* Responsive */
@media (max-width: 767px) {
    .youtube-mute-toggle {
        bottom: 130px;
        right: 10px;
    }
    
    .mute-btn {
        width: 55px;
        height: 55px;
    }
}