#calorie-deficit-calculator {
    margin: 20px 0;
}

#calorie-deficit-calculator input, #calorie-deficit-calculator select {
    margin: 10px 0;
    padding: 8px;
    width: calc(100% - 16px);
}

#calorie-deficit-calculator button {
    padding: 10px 20px;
    cursor: pointer;
}

#result {
    margin-top: 20px;
}