@media only screen and (max-width: 767px) {
    body {
        padding: 0;
        margin: 0;
        background-color: #282828;
    }

    .container {
        margin: 0 auto;
        padding: 0;
        width: 375px;
        height: 1863px;
        background-image: url("bg.png");
        background-size: 100% 100%;
        background-repeat: no-repeat;
        background-position: center;
    }
}

@media only screen and (min-width: 768px) {
    body {
        padding: 0;
        margin: 0;
        background-color: #282828;
    }

    .container {
        margin: 0 auto;
        padding: 0;
        width: 375px;
        height: 1863px;
        background-image: url("bg.png");
        background-size: 100% 100%;
        background-position: center;
        background-repeat: no-repeat;
    }
}