body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    width: 90%;
    max-width: 600px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    font-size: 1.5em;
}

form {
    display: flex;
    flex-direction: column;
}

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

input {
    padding: 10px;
    font-size: 1em;
}

button {
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
}

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

.correct {
    background-color: green;
    color: white;
}

.incorrect {
    background-color: red;
    color: white;
}

img {
    max-width: 100%;
    height: auto;
    margin: 10px 0;
}