body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.menu {
    margin-top: 20px;
    margin-bottom: 10px;
}

.container {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: auto;
    text-align: center;
}

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

input[type="number"], select, button {
    width: 100%;
}

button {
    padding: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #0056b3;
}

#results p {
    font-size: 16px;
    color: #333;
    margin: 5px 0;
}