body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: black;
    color: white!important;
}
#container {
    width: 90%;
    max-width: 400px;
    text-align: center;
    margin: auto;
}

img {
    width: 100%;
}