:root{--ink: #111827;--muted: #6b7280;--line: #e5e7eb;--bg: #f9fafb;--accent: #111827}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:15px;color:var(--ink);background:var(--bg)}h1{font-size:22px;margin:0 0 16px}h2{font-size:17px;margin:24px 0 8px}p{line-height:1.5}label{display:block;margin:0 0 12px;font-weight:600}label input,label select{display:block;width:100%;margin-top:4px;font-weight:400}label.tick{display:flex;gap:8px;align-items:flex-start;font-weight:400}label.tick input{width:auto;margin-top:3px}input,select{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}button{font:inherit;padding:8px 14px;border-radius:6px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer}button:disabled{opacity:.5;cursor:default}button.plain{background:#fff;color:var(--ink);border-color:var(--line)}button.link{background:none;border:none;color:var(--ink);text-decoration:underline;padding:8px 0}.page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.box{width:100%;max-width:420px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px}.note{padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:var(--bg)}.code{font-size:22px;letter-spacing:6px;width:10ch;text-align:center;margin:0 0 12px;display:block}.secret{font-family:ui-monospace,Menlo,monospace;word-break:break-all;padding:8px 10px;background:var(--bg);border-radius:6px}.qr{display:block;margin:8px 0}.row{display:flex;gap:8px;align-items:flex-end;flex-wrap:wrap}.row label{margin:0}.app{max-width:1100px;margin:0 auto;padding:16px}header{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:12px}nav{display:flex;gap:6px;flex-wrap:wrap}.tab{background:#fff;color:var(--ink);border-color:var(--line)}.tab.on{background:var(--accent);color:#fff;border-color:var(--accent)}.who{color:var(--muted)}section{margin-top:16px}.panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px;margin:12px 0;max-width:520px}table{width:100%;border-collapse:collapse;margin-top:12px;background:#fff}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}td.actions{display:flex;gap:6px;flex-wrap:wrap}.hint{color:var(--muted)}