:root{--bg:#f7f8fa;--card:#fff;--text:#1a1d24;--muted:#5a6473;--border:#e3e7ed;--link:#2563eb}@media (prefers-color-scheme:dark){:root{--bg:#0f1319;--card:#171c24;--text:#e7eaf0;--muted:#9aa4b2;--border:#2a313c;--link:#fff}}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}.container{max-width:520px;margin:0 auto;padding:32px 20px 8px;min-height:70vh}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px;margin-bottom:16px}h1{font-size:1.4rem;margin:0 0 4px}.muted{color:var(--muted);font-size:.9rem}a{color:var(--link);text-decoration:underline}.footer{max-width:520px;margin:0 auto;padding:16px 20px 40px;text-align:center}.footer p{color:var(--muted);font-size:.78rem;margin:0}