.form-div {
    margin: 0 auto;
    width: 400px;
    padding-top: 100px;
}

.form-table td {
    padding: 5px;
    text-align: left;
}

.red-border {
    border: 1px solid red;
}

input#d1, input#d2 {
    width: 20px;
}

input#d3 {
    width: 32px;
}