.total-content{
    width: 100%;
    height: 100dvh;
}

.logo-box{
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
}

.logo{
    width: 80%;
    max-width: 400px;
}