:root{--primary: #0077ff;--bg: #f8fafc;--text: #1e293b;--muted: #64748b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}.container{max-width:720px;margin:0 auto;padding:3rem 1.5rem}h1{font-size:2rem;margin-bottom:.5rem}.date{color:var(--muted);margin-bottom:2rem;display:block}h2{font-size:1.25rem;margin:2rem 0 .75rem;color:var(--primary)}p,li{margin-bottom:.75rem}ul{padding-left:1.5rem}a{color:var(--primary)}.back{display:inline-block;margin-bottom:2rem;color:var(--primary);text-decoration:none}.back:hover{text-decoration:underline}