body {
    width: 100%;
    height: 100%;
    background-color: lightblue;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.content {
    background-color: white;
    border: 2px solid black;
    padding:30px;
    margin:5px;
    border-radius: 20px;
    width:50vw;
    padding-top: 5px;
}
.warning {
    color:red;
    font-weight: bolder;
    font-style: italic;
}
#puzzle {
    font-family: 'Courier New', Courier, monospace;
    font-size:16pt
}