:root{color-scheme:dark;--bg: #12141a;--fg: #e8eaf0;--muted: #9aa1b2;--accent: #8cb4fa;--panel: #121419;--border: #2a2e3a}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.6}main{max-width:44rem;padding:3rem 1.5rem;text-align:center}h1{font-size:2.25rem;margin:0 0 .5rem;letter-spacing:-.02em}p{margin:.5rem 0;color:var(--muted)}strong{color:var(--accent);font-weight:600}code{background:var(--panel);border:1px solid var(--border);border-radius:4px;padding:.1em .35em;font-size:.9em;color:var(--fg)}.canvas-wrap{margin:1.75rem auto;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:var(--panel);max-width:640px}canvas{display:block;width:100%;height:auto}.hint{font-size:.95rem}.fallback{padding:3rem 1.5rem;margin:0}