:root{font-family:Tahoma,Arial,sans-serif;color:#17202a;background:#f3f5f7}*{box-sizing:border-box}body{margin:0}.topbar{display:flex;justify-content:space-between;align-items:center;background:#17202a;color:#fff;padding:14px 24px;position:sticky;top:0;z-index:5}.badge{font-size:.75rem;background:#f4d03f;color:#17202a;padding:3px 8px;border-radius:12px;margin-inline-start:8px}main{max-width:1500px;margin:24px auto;padding:0 18px}.panel{background:#fff;border:1px solid #dfe6e9;border-radius:10px;padding:20px;box-shadow:0 2px 12px rgba(0,0,0,.04)}.narrow{max-width:480px;margin:70px auto}label{display:flex;flex-direction:column;gap:6px;margin:10px 0;font-weight:700}input,textarea,button{font:inherit}input,textarea{border:1px solid #bfc9ca;border-radius:6px;padding:10px;background:#fff}textarea{width:100%;min-height:260px;direction:ltr;text-align:left;font-family:Consolas,monospace;font-size:12px}button{border:0;border-radius:6px;padding:10px 15px;background:#1f618d;color:#fff;cursor:pointer}button:hover{background:#154360}.tabs{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}.tabs button{background:#34495e}.toolbar{display:flex;align-items:end;justify-content:space-between;gap:12px;flex-wrap:wrap}.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:16px 0}.metric{border:1px solid #dfe6e9;border-radius:8px;padding:15px}.metric strong{display:block;font-size:1.6rem}.operation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(420px,1fr));gap:14px}.operation-grid article{border:1px solid #dfe6e9;border-radius:8px;padding:14px}.result{min-height:80px;background:#17202a;color:#ecf0f1;padding:14px;border-radius:8px;overflow:auto;direction:ltr;text-align:left}.muted{color:#657786}table{width:100%;border-collapse:collapse;margin-top:12px;font-size:.9rem}th,td{border:1px solid #dfe6e9;padding:8px;text-align:right}th{background:#eef2f3}code{direction:ltr}@media(max-width:600px){.operation-grid{grid-template-columns:1fr}.topbar{padding:12px}.panel{padding:12px}}