body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1, h2, h3 {
    color: #333;
}

form label, form input, form select {
    display: block;
    margin: 10px 0;
}

input[type="text"], input[type="number"], select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

.hidden {
    display: none;
}

#resultSection {
    margin-top: 20px;
    padding: 15px;
    border-top: 2px solid #4CAF50;
}