.final-result {
    color: #4CAF50;
    font-weight: bold;
    margin-top: 15px;
}

.error-message {
    color: red;
    font-weight: bold;
}

.formula-title {
    font-size: 1.1em;
    margin-bottom: 10px;
}

.calculation-steps {
    background-color: #f8f9fa;
    padding: 10px;
    border-radius: 5px;
    margin: 10px 0;
}