* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.7;
    color: #1d1d1f;
    background: #fff;
    padding: 40px 20px;
}
.container {
    max-width: 640px;
    margin: 0 auto;
}
nav {
    margin-bottom: 32px;
}
nav a {
    font-size: 14px;
    color: #0066cc;
    text-decoration: none;
}
nav a:hover {
    text-decoration: underline;
}
h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}
.updated {
    font-size: 14px;
    color: #86868b;
    margin-bottom: 40px;
}
h2 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 8px;
}
p {
    margin-bottom: 16px;
    color: #333;
}
ul {
    margin-bottom: 16px;
    padding-left: 24px;
}
li {
    margin-bottom: 6px;
    color: #333;
}
a {
    color: #0066cc;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid #e5e5e5;
    font-size: 13px;
    color: #86868b;
}