body {
    font-family: Arial, sans-serif;
    text-align: center;
    padding-top: 50px;
}

.door {
    display: inline-block;
    width: 100px;
    height: 200px;
    margin: 10px;
    background-color: #DDD;
    cursor: pointer;
}

#message {
    margin: 20px;
    font-size: 20px;
    color: blue;
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
}
#statistics {
    margin-top: 20px;
}