html, body {
    height: 100%;
    margin: 0;

    overflow: hidden;
}

body {
    background: repeating-conic-gradient(#ffffff 0 25%, #98bfec 0 50%)
        50% / 100px 100px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.title {
    text-align: center;
    border: groove;
    border-color: #000000;
    background-color: #ffffff;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    padding: 0px 30px;

    font-size: x-large;
}

.game {
    height: 90vh;
    aspect-ratio: 9 / 16;
    margin: auto;

    background: 
    repeating-conic-gradient(#24b66d 0 25%, #18a05c 0 50%) 
      50% / 17.5% 10%
}

#game {
    display: block;
    width: 100%;
    aspect-ratio: 9 / 16;
    height: auto;
}