.rent-form {
    position: absolute;
    top: 20%;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: 400px;
    max-height: 90%;
    background-color: #fff;
    overflow: auto;
    padding: 30px;
}

#rent-form {
    text-align: center;
}

.rent-form h3 {
    text-align: center;
}

#place_order {
    margin-top: 10px;
}