:root{color-scheme:dark;--bg:#0b1017;--panel:#121a24;--line:#2a3848;--muted:#9aabbd;--text:#edf4fa;--cyan:#78e3d3}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 80% -12%,#20384d 0,transparent 34%),var(--bg);color:var(--text);font:15px/1.8 system-ui,-apple-system,"Segoe UI",sans-serif}.page{max-width:900px;margin:48px auto;padding:32px;background:var(--panel);border:1px solid var(--line);border-radius:16px}a{color:var(--cyan)}h1{line-height:1.3}h2{margin-top:30px}small,.muted{color:var(--muted)}