.chp-app {
    max-width:800px;
    margin:auto;
    background:#fff;
    padding:20px;
}

.chp-question {
    display:none;
    border:1px solid #ddd;
    padding:20px;
    margin-top:20px;
}

.pilot {
    font-size:20px;
    background:#e3f2fd;
    padding:15px;
    margin:10px 0;
}

.answers {
    display:none;
    background:#e8f5e9;
    padding:15px;
    margin:10px 0;
}

button {
    margin-top:10px;
    padding:8px 15px;
}