body {
    font-size: large;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: hidden;
}

a {
    color: blue;
    text-decoration: none;
}

button:hover:enabled {
    cursor: pointer;
}

.zone {
    border-width: 1px;
    border-style: solid;
}

.highlight {
    background-color: rgba(255,255,255,0.3);
    /* background-color: rgba(0,0,0,0.2); */
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}