/* --- MUTE BUTTON --- */
#muteBtn {
    position: fixed; /* fixed relative to viewport */
    top: 15px;
    right: 15px;
    background: transparent; /* subtle glass effect */
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    color: #fff;
    box-shadow: 0 0 12px rgba(255,255,255,0.4);
    cursor: pointer;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    transition: transform 0.2s ease,  0.2s ease, box-shadow 0.2s ease;

}

#muteBtn:hover {
    transform: scale(1.1);
    background-color:  transparent;
    box-shadow: 0 0 20px #ff4d4d, 0 0 40px #ff1a1a;
}

/* --- MOBILE RESPONSIVE --- */
@media (max-width: 768px) {
    #muteBtn {
        width: 60px;
        height: 60px;
        font-size: 2rem;
        top: 10px;
        right: 10px;
    }
}

@media (max-width: 480px) {
    #muteBtn {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        top: 10px;
        right: 10px;
    }
}