details {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-bottom: 1rem;
    padding: 1rem;
}

summary {
    font-weight: bold;
    cursor: pointer;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

details[open] summary::after {
    content: " ▲";
}

summary::after {
    content: " ▼";
    float: right;
    font-size: 0.8rem;
}

p {
    margin-top: 0.5rem;
    line-height: 1.6;
}

a {
    color: #006400;
    text-decoration: none;
}

    a:hover {
        text-decoration: underline;
    }