html, body {
    height: 100%;
    background-color: #FFFFFF;
}

#register_form {
    width: 300px;
    margin: auto;
    margin-top: 5%;
}

#register_form .text {
    height: 38px;
    width: 300px;
    margin: 20px auto 0 auto;
    font-size: large;
    border-radius: 5px;
}

#register_form button {
    height: 38px;
    width: 305px;
    margin: 10px auto 0 auto;
    font-size: large;
    border-radius: 5px;
    background-color: #3BAFFA;
}

#register_form select {
    height: 38px;
    width: 305px;
    margin: 10px auto 0 auto;
    font-size: large;
    border-radius: 5px;
}

#title {
    text-align: center;
    font-size: x-large;
}

#content {
    width: 300px;
    margin: auto;
    margin-top: 5%;
}

#content p {
    height: 38px;
    width: 300px;
    margin: 10px auto 0 auto;
    font-size: large;
    border-radius: 5px;
}

#birthday {
    height: 38px;
    width: 180px;
    font-size: large;
    border-radius: 5px;

}

.tips {
    height: 38px;
    width: 300px;
    margin: 10px auto 0 auto;
    font-size: large;
}