* {
    padding: 0;
    margin: 0;
}

html, body {
    width: 100%;
    height: 100%;
}

body {
    background: #101010;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.container {
    width: 640px;
    height: 480px;
    background-color: #004;
}