body {
    display: flex;
    flex-flow: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#menu {
    position: absolute;
    /* width: 100vw; */
    /* aspect-ratio: 3/4; */
    /* max-height: 100vh; */
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-flow: column;
    justify-content: center;
    align-items: center;
    line-height: 2;
}

#background {
    z-index: 0;
    position: absolute;
    /* width: 100%; */
    /* height: 100%; */
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: lightgrey;
    opacity: 0.5;
}

ul {
    z-index: 1;
    font-family: sans-serif;
    /*font-size: 2em;*/
    font-size: 3vmin;
    list-style: none;
    margin: 0;
    padding: 1em;
    color: black;
    background-color: white;
    box-shadow: 10px 10px #00000054;
}

li {
    cursor: pointer;
    list-style: disc;
    list-style: inside;
}

li:hover {
    text-decoration: underline;
}