.title-party {
    width: 100%;
    text-align: center;
    font-family: 'ChristmasSquad', sans-serif;
    font-size: 130px;
    position: absolute;
    color: #fff;
    text-shadow: 5px 3px #000000;
}

.volume-controller {
    font-size: 35px;
    position: absolute;
    color: #fff;
    left: 20px;
    top: 10px;
    z-index: 100;
}

    .volume-controller i {
        cursor: pointer;
    }

@media (max-width: 768px) {
    .title-party {
        font-size: 60px;
    }

    .volume-controller {
        font-size: 20px; 
        left: 11px;
        top: 7px;
    }
}