* {
    box-sizing: border-box;
}

body {
    width: 100vw;
    height: 100vh;
    background-color: black;

    display: flex;
    justify-content: center;
    align-items: center;

    margin: 0;
    overflow: hidden;
}

@media screen and (min-width: 400px) {
    body {
        width: 100vw;
        height: 100vh;
        background-color: black;

        display: flex;
        justify-content: center;
        align-items: center;

        margin: 0;
        overflow: hidden;
    }
  }
  
  @media screen and (min-width: 800px) {
    body {
        width: 100vw;
        height: 100vh;
        background-color: black;

        display: flex;
        justify-content: center;
        align-items: center;

        margin: 0;
        overflow: hidden;
    }
}

@media (max-width: 600px) {
    body {
        width: 100vw;
        height: 100vh;
        background-color: black;

        display: flex;
        justify-content: center;
        align-items: center;

        margin: 0;
        overflow: hidden;
    }
}