.percentage-calculator {
    font-family: Arial, sans-serif;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 10px;
    background-color: #f9f9f9;
}

.calculator-section {
    margin-bottom: 30px;
}

.calculator-section h3 {
    margin-bottom: 10px;
    font-size: 18px;
    color: #333;
}

.calculator-section input[type="number"], .calculator-section select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.calculator-section button {
    padding: 10px 15px;
    margin-right: 10px;
    border: none;
    border-radius: 5px;
    background-color: #0073aa;
    color: #fff;
    cursor: pointer;
}

.calculator-section button:hover {
    background-color: #005177;
}

#percentage-steps, #difference-result, #difference-steps, #change-result, #change-steps {
    margin-top: 10px;
    font-size: 14px;
    color: #555;
}