body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #0b0b0b; color: #f1f1f1; }
main { max-width: 760px; margin: 0 auto; padding: 28px 18px 40px; line-height: 1.6; }
.doc-nav { max-width: 760px; margin: 0 auto; padding: 18px 18px 0; }
.doc-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid #333;
    background: #111;
    color: #fff;
    text-decoration: none;
    padding: 10px 14px;
    font-size: 13px;
}
h1 { font-size: 24px; margin: 0 0 14px; }
h2 { font-size: 18px; margin: 24px 0 8px; }
p, li { color: #d3d3d3; font-size: 14px; }
a { color: #fff; }
.muted { color: #9a9a9a; font-size: 12px; }