css
#fence-calculator {
    margin: 20px 0;
}

#fence-calculator label {
    display: block;
    margin-bottom: 5px;
}

#fence-calculator input, #fence-calculator select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
}

#calculation-results {
    margin-top: 20px;
}