:root{
    --ct-primary:#2563eb;
    --ct-primary-dark:#1d4ed8;
    --ct-bg:#f8fafc;
    --ct-card:#ffffff;
    --ct-border:#e2e8f0;
    --ct-text:#1e293b;
    --ct-muted:#64748b;
    --ct-green:#16a34a;
    --ct-green-bg:#dcfce7;
    --ct-red:#dc2626;
    --ct-red-bg:#fee2e2;
    --ct-yellow-bg:#fef9c3;
    --ct-radius:10px;
    --ct-shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.04);
  }
  .ct-wrap *{box-sizing:border-box;}
  .ct-wrap{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    color:var(--ct-text);
    background:var(--ct-bg);
    padding:24px 16px 48px;
    max-width:1100px;
    margin:0 auto;
    line-height:1.5;
  }
  .ct-badges{ display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:22px; }
  .ct-badge{
    display:flex;align-items:center;gap:6px;
    background:var(--ct-card);border:1px solid var(--ct-border);
    padding:8px 14px;border-radius:999px;font-size:13px;font-weight:600;
    color:var(--ct-muted);box-shadow:var(--ct-shadow);
  }
  .ct-badge svg{width:15px;height:15px;flex:none;color:var(--ct-primary);}
  .ct-card{ background:var(--ct-card); border:1px solid var(--ct-border); border-radius:var(--ct-radius); box-shadow:var(--ct-shadow); overflow:hidden; }
  .ct-modes{ display:flex;flex-wrap:wrap; border-bottom:1px solid var(--ct-border); background:#f1f5f9; }
  .ct-mode-btn{
    flex:1 1 auto; min-width:120px; padding:14px 10px; background:transparent; border:none;
    border-bottom:3px solid transparent; font-size:13.5px; font-weight:600; color:var(--ct-muted);
    cursor:pointer; transition:.15s; text-align:center;
  }
  .ct-mode-btn:hover{color:var(--ct-primary);background:#e8eefc;}
  .ct-mode-btn.active{color:var(--ct-primary);border-bottom-color:var(--ct-primary);background:var(--ct-card);}
  .ct-panel{display:none;padding:22px;}
  .ct-panel.active{display:block;}
  .ct-subrow{ display:flex;flex-wrap:wrap;gap:8px; margin-bottom:16px; }
  .ct-chip{
    padding:6px 14px;border-radius:999px;border:1px solid var(--ct-border);
    background:#fff;font-size:12.5px;font-weight:600;color:var(--ct-muted);cursor:pointer;
  }
  .ct-chip.active{background:var(--ct-primary);border-color:var(--ct-primary);color:#fff;}
  .ct-grid2{ display:grid;grid-template-columns:1fr 1fr;gap:16px; }
  @media(max-width:700px){.ct-grid2{grid-template-columns:1fr;}}
  .ct-field label{ display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--ct-text); }
  .ct-field textarea{
    width:100%;min-height:220px;resize:vertical;
    border:1px solid var(--ct-border);border-radius:8px;
    padding:12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:13px;background:#fbfcfe;
  }
  .ct-field textarea:focus{outline:2px solid var(--ct-primary);outline-offset:1px;}
  .ct-drop{
    border:2px dashed var(--ct-border);border-radius:8px;
    padding:16px;text-align:center;background:#fbfcfe;cursor:pointer;
    font-size:13px;color:var(--ct-muted);margin-bottom:10px;transition:.15s;
  }
  .ct-drop.dragover{border-color:var(--ct-primary);background:#eef4ff;color:var(--ct-primary);}
  .ct-drop input[type=file]{display:none;}
  .ct-upload-btn{
    display:inline-block;margin-top:8px;padding:8px 18px;border-radius:7px;
    background:var(--ct-primary);color:#fff;font-size:13px;font-weight:700;
    border:none;cursor:pointer;
  }
  .ct-upload-btn:hover{background:var(--ct-primary-dark);}
  .ct-filename{font-size:12px;color:var(--ct-primary);font-weight:600;margin-top:6px;word-break:break-all;}
  .ct-options{
    display:flex;flex-wrap:wrap;gap:14px;margin:16px 0;padding:14px;
    background:#f8fafc;border:1px solid var(--ct-border);border-radius:8px;
  }
  .ct-option{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:500;}
  .ct-option input{width:15px;height:15px;accent-color:var(--ct-primary);}
  .ct-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;align-items:center;}
  .ct-btn{ padding:11px 22px;border-radius:8px;border:none;font-size:14px;font-weight:700; cursor:pointer;transition:.15s; }
  .ct-btn-primary{background:var(--ct-primary);color:#fff;}
  .ct-btn-primary:hover{background:var(--ct-primary-dark);}
  .ct-btn-secondary{background:#fff;color:var(--ct-text);border:1px solid var(--ct-border);}
  .ct-btn-secondary:hover{background:#f1f5f9;}
  .ct-btn:disabled{opacity:.5;cursor:not-allowed;}
  .ct-summary{ display:flex;flex-wrap:wrap;gap:10px;margin:18px 0; }
  .ct-stat{ flex:1 1 130px;background:#f8fafc;border:1px solid var(--ct-border); border-radius:8px;padding:12px 14px;text-align:center; }
  .ct-stat b{display:block;font-size:20px;color:var(--ct-primary);}
  .ct-stat span{font-size:11.5px;color:var(--ct-muted);font-weight:600;text-transform:uppercase;letter-spacing:.3px;}

  .ct-results-section{ margin-top:22px; border-top:2px solid var(--ct-border); padding-top:18px; }
  .ct-results-title{ display:flex;align-items:center;gap:8px;font-size:15px;font-weight:800;margin-bottom:12px;color:var(--ct-text); }
  .ct-results-title svg{width:18px;height:18px;color:var(--ct-primary);}
  .ct-results{margin-top:4px;}
  .ct-results-head{ display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:10px; }
  .ct-results-head h3{margin:0;font-size:15px;}
  .ct-diff-view{ border:1px solid var(--ct-border);border-radius:8px;overflow:hidden; }
  .ct-diff-cols{display:grid;grid-template-columns:1fr 1fr;}
  @media(max-width:700px){.ct-diff-cols{grid-template-columns:1fr;}}
  .ct-diff-col{border-right:1px solid var(--ct-border);}
  .ct-diff-col:last-child{border-right:none;}
  .ct-diff-col h4{ margin:0;padding:8px 12px;background:#f1f5f9;font-size:12px;font-weight:700; border-bottom:1px solid var(--ct-border); }
  .ct-diff-body{ max-height:420px;overflow:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px; }
  .ct-line{padding:3px 12px;white-space:pre-wrap;word-break:break-word;border-bottom:1px solid #f1f5f9;}
  .ct-line.add{background:var(--ct-green-bg);}
  .ct-line.del{background:var(--ct-red-bg);}
  .ct-line.mod{background:var(--ct-yellow-bg);}
  .ct-table-wrap{overflow:auto;max-height:460px;border:1px solid var(--ct-border);border-radius:8px;}
  table.ct-table{width:100%;border-collapse:collapse;font-size:12.5px;}
  table.ct-table th{
    position:sticky;top:0;background:#f1f5f9;padding:8px 10px;text-align:left;
    border-bottom:1px solid var(--ct-border);font-weight:700;white-space:nowrap;
  }
  table.ct-table td{padding:6px 10px;border-bottom:1px solid #f1f5f9;vertical-align:top;word-break:break-word;}
  table.ct-table tr.row-diff td{background:var(--ct-yellow-bg);}
  .ct-empty{padding:30px;text-align:center;color:var(--ct-muted);font-size:13.5px;}
  .ct-hint{font-size:12px;color:var(--ct-muted);margin-top:4px;}
  @media(max-width:600px){
    .ct-mode-btn{font-size:12px;padding:11px 6px;}
    .ct-panel{padding:16px;}
  }