:root{--bg-color: #f9f9fb;--text-color: #111827;--primary-color: #3b82f6}html,body{margin:0;padding:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6}.container{max-width:800px;margin:0 auto;padding:2rem}h1,h2,h3{line-height:1.2;margin-bottom:1rem}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}