:root{--text-primary:#111;--text-secondary:#555;--link:#2563eb;--bg:#fff}*{box-sizing:border-box}body{background:var(--bg);color:var(--text-primary);margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji;line-height:1.6}a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:770px;margin:0 auto;padding:4rem 1.5rem}html,body{height:100%}body{flex-direction:column;display:flex}