:root{color-scheme:light dark;--bg:#f4f6fa;--surface:#fff;--ink:#172332;--muted:#526174;--line:#d7dee7;--link:#155b94;--button:#15563f;--button-text:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,sans-serif}main{max-width:740px;margin:10vh auto;padding:32px;background:var(--surface);border:1px solid var(--line);border-radius:10px}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--muted)}h1{font-size:32px;line-height:1.2;letter-spacing:-.03em}.open{display:inline-block;background:var(--button);color:var(--button-text);padding:12px 18px;border-radius:6px;font-weight:600;text-decoration:none}.open:focus-visible{outline:3px solid var(--link);outline-offset:4px}.note{color:var(--muted);font-size:14px;margin-top:22px}@media(prefers-color-scheme:dark){:root{--bg:#111923;--surface:#18232f;--ink:#edf2f8;--muted:#b0bdcc;--line:#354455;--link:#9dcfff;--button:#a5e8c9;--button-text:#183c32}}@media(max-width:760px){main{margin:24px 16px;padding:24px}}