body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

form {
    margin-bottom: 20px;
}

fieldset {
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 20px;
}

legend {
    padding: 0 10px;
    font-weight: bold;
}

.input-row {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.input-row label {
    flex: 1;
    margin-right: 10px;
}

.input-row input {
    flex: 2;
    margin-right: 10px;
}

.add-btn, .remove-btn, .submit-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 5px 2px;
    cursor: pointer;
    border-radius: 5px;
}

.remove-btn {
    background-color: #f44336;
}

.add-btn {
    background-color: #008CBA;
}

.options {
    display: flex;
    flex-direction: column;
}

#results {
    white-space: pre-wrap; /* Preserve whitespace for the output */
    background: #f9f9f9;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    margin-top: 20px;
}