:root{--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#667085;--primary:#1d4ed8;--danger:#b42318;--success:#067647;--border:#d7dce5}*{box-sizing:border-box}body{margin:0;background:var(--bg);font-family:Inter,Arial,sans-serif;color:var(--text)}.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:#0f172a;color:#fff;gap:20px}.topbar span{display:block;color:#cbd5e1;font-size:12px}.topbar nav{display:flex;gap:12px;flex-wrap:wrap}.topbar a{color:#fff;text-decoration:none;font-size:14px}.container{max-width:1180px;margin:28px auto;padding:0 18px}.narrow{max-width:620px}.card{background:var(--card);padding:22px;border:1px solid var(--border);border-radius:16px;box-shadow:0 8px 22px rgba(15,23,42,.05);margin-bottom:18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}.stat{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px}.stat strong{font-size:32px;display:block}label{display:block;margin:12px 0;font-weight:600}input,textarea,select{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;background:#fff}textarea{min-height:120px}button,.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:10px;padding:11px 15px;text-decoration:none;font-weight:700;cursor:pointer}.btn.secondary,button.secondary{background:#475467}.btn.danger{background:var(--danger)}.alert{padding:12px 14px;border-radius:12px;margin:14px 0;background:#e0f2fe}.alert.success{background:#dcfae6;color:#054f31}.alert.danger{background:#fee4e2;color:#7a271a}.alert.warning{background:#fef0c7;color:#7a2e0e}table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}th,td{border-bottom:1px solid var(--border);padding:12px;text-align:left;vertical-align:top}th{background:#f8fafc}.actions{display:flex;gap:8px;flex-wrap:wrap}.muted{color:var(--muted)}pre.output{white-space:pre-wrap;background:#0f172a;color:#e5e7eb;padding:16px;border-radius:14px;overflow:auto}.badge{display:inline-block;border-radius:999px;padding:4px 8px;background:#e0e7ff;color:#3730a3;font-size:12px;font-weight:700}.score{font-size:42px;font-weight:900}.ok{color:var(--success)}.bad{color:var(--danger)}footer{text-align:center;color:#667085;padding:30px}