.survey {
    border:1px black solid;
    display: block;
    width:100%;
    padding:20px;
    max-width: 600px;
    margin:auto;
    margin-top:20px;
}

.survey select {
    width:100%;
    margin-top:10px;
    padding:5px;
}

.survey .btn {
    margin-top:10px;
}