#main-content .entry-content p {
    text-align: center;
    margin-top: 0;
}

.contentbox dl {
    width: 400px;
    display: block;
    margin: 0 auto;
}

.contentbox dt {
    text-align: left;
    width: 100%;
    display: block;
    border-bottom:none;
}

.contentbox dd {
    width: 100%;
    display: block;
    margin: 5px 0 30px 0;
    padding: 0;
    border-bottom:none;
}

input[name="birthYear"] {
    width: 11em;
    margin-right: 0.5em;
}

select[name="birthMonth"] {
    margin: 0 0.5em;
}

select[name="birthDay"] {
    margin: 0 0.5em;
}
button[type="submit"]{
    width:400px;
}

@media screen and (max-width: 599px){
#main-content .entry-content p {
    text-align: left;
}

.contentbox dl {
    width: 100%;
}

input[name="birthYear"] {
    width: 8em;
}
}