body {
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}
.map{
    float: left;
    width: 50%;
    height: 600px;
    margin: 0 auto;
    text-align: center;
}
.quiz {
    margin: 30px auto;
    text-align: center;
}
#WebGL-output {
    display: inline-block;
}
.stamp{
    clear: left;
}
.ttl {
    margin: 0 0 20px;
    text-align: center;
}
.question {
    margin: 10px 0 15px 0;
    font-size: large;
}
.btn {
    -webkit-appearance: none;
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 15%;
    height: 40px;
    margin: 0 10px;
    padding: 0;
    border: solid 1px;
    outline: none;
    font-size: 15px;
    text-decoration: none;
    cursor: pointer;
}
#next {
    display: inline-block;
}
.choices {
    flex-wrap: wrap;
    width: 100%;
    margin: 0;
    padding-left: 0;
}
.item {
    list-style: none;
    margin: 5px;
}
#result {
    margin: 10px 0px;
    font-size: 20px;
    font-weight: bold;
}
.correct {
    color: red;
    font-size: 30px;
    font-weight: bold;
}
.incorrect {
    color: blue;
    font-size: 30px;
    font-weight: bold;
}
.commentary {
    font-size: 20px;
}
.none {
    display: none;
    margin: 10px;
}