body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}

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

h1 {
    background-color: #4CAF50; /* Title background color */
    color: white;
    padding: 10px;
    text-align: center;
    border-radius: 5px;
}

#category-select {
    display: block; /* Make it a block element to center it */
    margin: 20px auto; /* Centering with auto margins */
    padding: 10px;
    font-size: 16px;
}

button {
    background-color: #4CAF50; /* Submit button background color */
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    display: block; /* Make it a block element to center it */
    margin: 20px auto; /* Centering with auto margins */
}

button:hover {
    background-color: #45a049; /* Darker shade on hover */
}

.question {
    margin-bottom: 20px;
}

.options {
    list-style-type: none;
    padding: 0;
}

.options li {
    margin: 5px 0;
}