.nt-tool{max-width:820px;margin:36px auto;padding:32px;background:#fff;border:1px solid rgba(15,23,42,.08);border-radius:18px;box-shadow:0 12px 36px rgba(15,23,42,.06);font-family:inherit}
.nt-tool h2{margin:0 0 6px;font-size:22px}
.nt-tool p.desc{color:#64748b;margin:0 0 20px;font-size:14px}
.nt-tool label{display:block;font-weight:600;font-size:13px;margin:14px 0 6px;color:#0f172a}
.nt-tool input[type=text],.nt-tool input[type=number],.nt-tool input[type=file],.nt-tool select,.nt-tool textarea{width:100%;padding:11px 13px;border:1px solid #e2e8f0;border-radius:10px;font:inherit;background:#f8fafc;box-sizing:border-box}
.nt-tool textarea{min-height:140px;resize:vertical;font-family:ui-monospace,Menlo,monospace}
.nt-tool button{padding:11px 20px;border:0;border-radius:10px;background:#2563eb;color:#fff;font-weight:700;cursor:pointer;font-family:inherit;transition:.15s}
.nt-tool button:hover{background:#1d4ed8}
.nt-tool button.sec{background:#f1f5f9;color:#0f172a}
.nt-tool .row{display:flex;gap:12px;flex-wrap:wrap;align-items:end}
.nt-tool .row>*{flex:1;min-width:120px}
.nt-tool .actions{margin-top:20px;display:flex;gap:10px;flex-wrap:wrap}
.nt-tool .result{margin-top:24px;padding:20px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px}
.nt-tool .result img,.nt-tool .result canvas{max-width:100%;height:auto;border-radius:8px}
.nt-tool .out{font-family:ui-monospace,Menlo,monospace;font-size:13px;white-space:pre-wrap;word-break:break-all;background:#0f172a;color:#e2e8f0;padding:14px;border-radius:8px;max-height:300px;overflow:auto}
.nt-tool .info{font-size:13px;color:#475569;margin-top:8px}
.nt-tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;max-width:1120px;margin:36px auto}
.nt-tool-card{padding:20px;background:#fff;border:1px solid rgba(15,23,42,.08);border-radius:14px;text-decoration:none;color:inherit;transition:.15s;display:block}
.nt-tool-card:hover{border-color:#2563eb;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,99,235,.12)}
.nt-tool-card h3{margin:0 0 6px;font-size:16px;color:#0f172a}
.nt-tool-card p{margin:0;font-size:13px;color:#64748b}