body{margin:0;font-family:Arial,Helvetica,sans-serif;background-color:#f5f6f8;color:#1b1b1b}pre{background:#f0f0f0;padding:12px;border-radius:4px;overflow-x:auto;font-size:13px}.topbar{display:flex;justify-content:space-between;align-items:center;background:#fff;padding:12px 20px;border-bottom:1px solid #ddd}.topbar b{font-size:16px}.container{max-width:900px;margin:24px auto;padding:0 16px}.card{background:#fff;border:1px solid #ddd;border-radius:6px;padding:16px;margin-bottom:16px}.muted{color:#666;font-size:13px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}select,input[type=text],input[type=file]{padding:6px 8px;font-size:14px}.drop{padding:12px;border:1px dashed #bbb;border-radius:4px;background:#fafafa}.btn{background-color:#2563eb;color:#fff;border:none;border-radius:4px;padding:8px 14px;font-size:14px;cursor:pointer}.btn:hover:not(:disabled){background-color:#1e4fd9}.btn.secondary{background-color:#e5e7eb;color:#111827}.btn.secondary:hover:not(:disabled){background-color:#d1d5db}.btn:disabled{background-color:#c7c7c7;color:#666;cursor:not-allowed}