body
{
    margin: 0;
}

.top-nav
{
    display: flex;
    border-bottom: 1px solid #dddddd;
}

.top-nav a 
{
    flex: 1;
    text-align: center;
    padding: 16px 0;
    text-decoration: none;
    color: #333333;
}

.content {
    max-width: 900px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

section h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

article {
    padding-left: 20px;
    margin-bottom: 24px;
}

article h3 {
    position: relative;
    font-size: 20px;
    margin-bottom: 8px;
}

article h3::before {
    content: "- ";
    position: absolute;
    left: -20px;
    color: #666666;
}

article p {
    margin: 6px 0;
}