body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

header {
    background-color: #f4f4f4;
    padding: 10px 0;
    text-align: center;
}

main {
    margin: 20px;
}

#definition-section {
    background-color: #e9ecef;
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
}

#definition-section h2 {
    color: #333;
}

#quiz-section {
    margin-bottom: 20px;
}

#zip-code-form {
    margin-top: 20px;
}

#zip-code-form label,
#zip-code-form input,
#zip-code-form button {
    display: block;
    width: 100%;
    margin-bottom: 10px;
}