html,body{margin:0;padding:0;font:16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;}
.wrap{max-width:1000px;margin:0 auto;padding:1rem;}
.site-header,.site-footer{background:#f6f7f9;border-bottom:1px solid #e3e6eb;}
.site-footer{border-top:1px solid #e3e6eb;border-bottom:0;margin-top:3rem;}
nav a{margin-right:1rem;text-decoration:none;color:#0366d6}
.brand{font-weight:700;margin-right:1rem}
h1{margin-top:0}