.da40-wb-calculator table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 10px;
}
.da40-wb-calculator th, .da40-wb-calculator td {
    border: 1px solid #ddd;
    padding: 6px;
}
.da40-wb-calculator button {
    padding: 8px 15px;
    background: #0073aa;
    color: #fff;
    border: none;
    cursor: pointer;
}
.da40-wb-calculator button:hover {
    background: #005a87;
}
.results {
    margin-top: 10px;
    font-weight: bold;
}