.calculator-form {
    background-color: #fff;
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

#kb-calculate-error {
    width: 100%;
    padding: 10px;
    border: none;
    background-color: #5cb85c;
    color: white;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#kb-calculate-error:hover {
    background-color: #4cae4c;
}

#kb-error-result {
    margin-top: 20px;
    padding: 10px;
    background-color: #e9e9e9;
    border: 1px solid #dcdcdc;
    border-radius: 4px;
}