body {
    font-family: Arial, sans-serif;
    margin: 20px;
    padding: 0;
    background-color: #f4f4f4;
    font-size: 18px;
}
li {
    margin-bottom: 10px;
}
h1 {
    color: #333;
}
p {
    color: #555;
}
blockquote {
    background-color: #e9ecef;
    padding: 10px;
    border-left: 5px solid #007bff;
    margin: 20px 0;
}
a {
    color: #007bff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.hint {
    border-left: 5px solid #28a745;
    padding: 10px;
    margin: 20px 0;
    font-style: italic;
}

.highlight {
    background-color: #ffeb3b;
}