body {
    background-color: #212121;
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
    width: 100%;
    height: 100%;
    margin: 0;
}

#main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    max-height: 100vh;
}