body {
    background-color: #e0ffff;
}

h1 {
    margin: auto;
}

img.first{
    display: block;
    width: 200px;
    height: 300px;
    margin-left: auto;
    margin-right: auto;
    border: 3px double #000080
}

.quiz {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}
.lead {
    font-weight: bold;
}

table {
    margin-left: auto;
    margin-right: auto;
}

button {
    margin: 10px;
    width: 150px;
    height: 50px;
}

.hinto {
    color: orange;
    font-weight: bold;
}
.seikai {
    color: red;
    font-size: 18px;
    font-weight: bold;
}