style.css

body {
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: calc((100vh / 2) * -1);  /* Negative half of height. */
    margin-left: calc((100vw / 2) * -1);  /* Negative half of width. */
    background: rgb(34, 34, 34);
    height: 100vh;
    width: 100vw;
    color: white;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    text-align: center;
    line-height: 0.5;
}

#lose {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 100vw;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(128, 128, 128, 0.85)
}

.active {
    display: flex !important;
}

.score,
.highscore {
    display: inline-flex;
    flex-direction: row;
    justify-content: space-between;
    width: 50%;
}

/* settings */
#settings {
    background: none;
    border: none;
    cursor: pointer;
    position: absolute;
    top: 1%;
    right: 1%;
}

#settingsmenu {
    z-index: 6969;
    position: absolute;
    display: none;
    flex-direction: column;
    align-content: center;
    justify-content: center;
    align-items: center;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: black;
    opacity: 0.8;
    line-height: normal;
}
#settingsmenu input,
#settingsmenu label,
#settingsmenu button {
    opacity: 1;
    padding: 5px;
    margin: 5px;

}

#settingsmenu button {
    background: white;
    border: none;
    border-radius: 10px;
    padding: 10px;
    cursor: pointer;
}