body {
    font-size: 1.8em;
    margin: 0px;
    padding: 0px;
}

#controlPanel {
    background-color: silver;
    margin: 0px;
    padding: 0px;
    height: 1.8em;
    position: sticky;
}

#output {
    font-family: monospace;
}

.hint .hinttext {
    display: none;
}

.hint:hover {
    font-weight: bold;
    font-size: 1.5em;
    border: 1px solid gray;
    color: red;
}

.hint:hover .hinttext {
    display: inline-block;
    position: absolute;
    top: 1px;
    right: 10px;
    color: black;
}