:root{--bg:#f6f6f4;--fg:#1d1d1b;--muted:#6b6b66;--accent:#b42318;--card:#fff;color:var(--fg);background:var(--bg);font-family:system-ui,Segoe UI,sans-serif}body{margin:0}main{max-width:760px;margin:0 auto;padding:32px 16px}h1{color:var(--accent);margin-bottom:4px}.muted{color:var(--muted)}.small{word-break:break-all;font-size:12px}.checks{background:var(--card);border:1px solid #e4e4df;border-radius:12px;padding:0;list-style:none}.checks li{border-bottom:1px solid #eee;padding:10px 16px}.checks li:last-child{border-bottom:0}canvas{border:1px solid #ddd;max-width:100%;margin:16px 0;display:block}canvas[width="0"],canvas:not([width]){display:none}section{flex-wrap:wrap;align-items:center;gap:12px;display:flex}section>p,section>canvas{flex-basis:100%}button,.button{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:8px;padding:10px 16px}