body {
    font-family: sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 80%;
    max-width: 600px;
    text-align: center;
}

h1 {
    color: #333;
}

#question {
    margin-bottom: 20px;
}

#planet1, #planet2 {
    font-weight: bold;
    color: #007bff;
}

input[type="number"] {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-right: 10px;
    width: 150px;
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

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

#feedback {
    margin-top: 20px;
    font-weight: bold;
}

#score {
    margin-top: 10px;
}

#information {
    margin-top: 20px;
    font-size: 0.8em;
    color: #777;
}