body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans JP",sans-serif;margin:18px}.card{max-width:780px;border:1px solid #ddd;border-radius:14px;padding:18px}h2{margin:0 0 12px}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.btn{font-size:18px;padding:12px 16px;border-radius:12px;border:1px solid #ccc;cursor:pointer;background:#fff}.btn.primary{font-weight:700}.btn.ik{border-color:#999}.btn.my{border-color:#999}.out{margin-top:14px;padding:14px;border-radius:12px;background:#f6f7f9}.num{font-size:24px;font-weight:900;letter-spacing:.4px;word-break:break-all}.muted{color:#666;font-size:13px}.err{margin-top:10px;color:#b00020;font-weight:700}.tools{margin-top:10px;display:flex;gap:10px;flex-wrap:wrap}ul{margin:10px 0 0;padding-left:18px}li{margin:6px 0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.hr{height:1px;background:#eee;margin:14px 0}.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#eee;font-weight:700;font-size:12px}