h2{
    text-align: center;
}

.calc{
    margin: 0 auto;
    width: 500px;
    padding-top: 5px;
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 5px;
    border-radius: 10px;
    background-color: #33ccff;
}

dl{
    width: 500px;
}

dt{
    width: 160px;
    display: inline-block;
    margin-top: 10px;
    text-align: center;
}

dd{
    display: inline-block;
    width: calc(500px - 180px);
    margin-top: 10px;
}

.send{
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: center;
    width: 500px;
}

input[type="submit"]{
    padding-top: 5px;
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 5px;
    letter-spacing: 0.1em;
    border: none;
    border: 1px solid #cccccc;
    border-radius: 5px;
    cursor: pointer;
}

.error{
    color: red;
    font-size: 14px;
}

.result{
    text-align: center;
    width: 500px;
}