body{
    margin: 0px;
    overflow-x: hidden; 
    font-family: 'IBM Plex Mono', sans-serif;
}

header{
    position: fixed;
    width: 100vw;
    height: 25px;
    top: calc(100vh - 25px);
    background-color: gray;
    font-size: 18px;
    padding-left: 10px;
}

div{
    margin: 10px;
}