:root{--bg:#f8fafc;--bg-card:#ffffff;--border:#e2e8f0;--text:#0f172a;--text-muted:#64748b;--primary:#8b5cf6;--primary-hover:#7c3aed;--danger:#ef4444;--success:#22c55e;--warning-bg:#fef3c7;--warning-border:#f59e0b;--error-bg:#fef2f2;--error-border:#fca5a5;--shadow:0 1px 3px rgba(0,0,0,.07), 0 4px 12px rgba(0,0,0,.04);--radius:.75rem;--font-mono:'JetBrains Mono','Fira Code','Courier New',monospace}.j2c-theme{font-family:'Inter',system-ui,sans-serif;color:var(--text);background:var(--bg);padding:1.5rem;border-radius:1rem;max-width:1300px;margin:0 auto}.text-center{text-align:center}.text-3xl{font-size:1.875rem;font-weight:800}.text-muted{color:var(--text-muted)}.text-danger{color:var(--danger)}.font-mono{font-family:var(--font-mono)}.mt-2{margin-top:.5rem}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.flex{display:flex}.gap-2{gap:.5rem}.col-span-2{grid-column:span 2}.app-layout{display:flex;flex-direction:column;gap:1.5rem}@media (min-width:1024px){.app-layout{flex-direction:row;align-items:flex-start}.left-col{width:460px;flex-shrink:0}.right-col{flex:1;position:sticky;top:1.5rem}}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem 1.5rem;box-shadow:var(--shadow)}.card-header{display:flex;justify-content:space-between;align-items:center}.card-header h3{margin:0;font-size:1rem;font-weight:700;display:flex;align-items:center;gap:.5rem}.card-header h3 i{color:var(--primary);width:18px;height:18px}.json-textarea{display:block;width:100%;margin-top:.75rem;padding:.75rem;border:1px solid var(--border);border-radius:.5rem;font-family:var(--font-mono);font-size:.82rem;line-height:1.6;resize:vertical;outline:none;color:var(--text);transition:border-color .15s,box-shadow .15s}.json-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgb(139 92 246 / 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var(--border);border-radius:.25rem;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:all .15s}.toggle-label input:checked+.chkbox{background:var(--primary);border-color:var(--primary)}.toggle-label input:checked+.chkbox::after{content:'';width:5px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg);margin-bottom:2px}.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem;border-radius:.5rem;font-weight:600;font-size:.82rem;cursor:pointer;border:none;transition:all .15s;white-space:nowrap}.btn i{width:14px;height:14px}.btn-sm{padding:.35rem .7rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-outline{background:#fff0;border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:#f1f5f9}.btn-ghost{background:#fff0;color:var(--text-muted);border:1px solid #fff0}.btn-ghost:hover{background:#f1f5f9;color:var(--text)}.stats-bar{display:flex;align-items:center;justify-content:center;gap:1.5rem;padding:1rem 1.5rem;border-left:3px solid var(--primary)}.stat-item{text-align:center}.stat-val{display:block;font-size:1.5rem;font-weight:800;color:var(--primary)}.stat-lbl{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.stat-divider{width:1px;height:36px;background:var(--border)}.table-wrapper{overflow-x:auto;border:1px solid var(--border);border-radius:.5rem}.preview-table{border-collapse:collapse;width:100%;font-size:.8rem;min-width:400px}.preview-table th{background:#1e293b;color:#e2e8f0;font-weight:700;font-family:var(--font-mono);padding:.55rem .75rem;text-align:left;border-right:1px solid #334155;white-space:nowrap;position:sticky;top:0}.preview-table th:last-child{border-right:none}.preview-table td{padding:.45rem .75rem;border-bottom:1px solid var(--border);border-right:1px solid var(--border);font-family:var(--font-mono);color:var(--text);max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.preview-table td:last-child{border-right:none}.preview-table tr:last-child td{border-bottom:none}.preview-table tr:nth-child(even) td{background:#f8fafc}.error-card{background:var(--error-bg);border:1px solid var(--error-border);border-radius:var(--radius);padding:1.5rem;display:flex;align-items:center;gap:1rem;color:var(--danger)}.error-card i{width:24px;height:24px;flex-shrink:0}.error-card p{margin:0;font-weight:600;font-size:.9rem}.empty-state{background:var(--bg-card);border:2px dashed var(--border);border-radius:var(--radius);padding:3rem 2rem;text-align:center;color:var(--text-muted)}.empty-state i{width:40px;height:40px;margin:0 auto 1rem;display:block}.empty-state p{margin:0;font-weight:500}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:#0f172a;color:#fff;padding:.7rem 1.5rem;border-radius:2rem;font-weight:600;font-size:.875rem;opacity:0;transition:all .25s;z-index:1000}.toast.show{transform:translateX(-50%) translateY(0);opacity:1}