.viewer-toolbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-bottom:24px;padding:12px 16px;background:linear-gradient(135deg, var(--gray-50), #fff);border-radius:60px;border:1px solid var(--gray-200)}.toolbar-group{display:flex;gap:8px;flex-wrap:wrap}.tool-btn{background:var(--gray-100);border:none;padding:8px 18px;border-radius:40px;font-size:0.8rem;font-weight:500;cursor:pointer;transition:all 0.2s;display:inline-flex;align-items:center;gap:8px;color:var(--gray-600)}.tool-btn:hover{background:var(--primary-color);color:white;transform:translateY(-2px)}.search-wrapper{position:relative;display:flex;align-items:center;background:var(--gray-100);border-radius:40px;padding:0 16px}.search-wrapper i{color:var(--gray-400);font-size:0.8rem}.search-wrapper input{border:none;background:transparent;padding:8px 12px;width:180px;font-size:0.8rem}.search-wrapper input:focus{outline:none}.search-count{font-size:0.7rem;color:var(--primary-color);margin-left:8px}.viewer-container{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}.editor-panel,.viewer-panel{background:white;border-radius:20px;overflow:hidden;border:1px solid var(--gray-200);box-shadow:0 4px 20px rgba(0,0,0,0.03)}.panel-header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200);font-weight:600;color:var(--gray-700)}.panel-actions{display:flex;gap:8px}.file-upload-label,.icon-btn-sm{background:transparent;border:none;padding:6px 12px;border-radius:30px;cursor:pointer;font-size:0.75rem;transition:all 0.2s;color:var(--gray-500);display:inline-flex;align-items:center;gap:6px}.file-upload-label:hover,.icon-btn-sm:hover{background:var(--gray-100);color:var(--primary-color)}.json-editor{width:100%;min-height:550px;padding:20px;font-family:'Fira Code',monospace;font-size:13px;line-height:1.6;border:none;resize:vertical;background:#1a1a2e;color:#e0e0e0}.json-editor:focus{outline:none}.json-tree-container{min-height:550px;max-height:550px;overflow-y:auto;padding:16px;background:#1a1a2e;font-family:'Fira Code',monospace;font-size:13px}.empty-placeholder{text-align:center;padding:80px 20px;color:var(--gray-500)}.empty-placeholder i{font-size:48px;margin-bottom:16px;opacity:0.5}.json-node{margin-left:20px;position:relative}.json-node-root{margin-left:0}.json-node-header{display:flex;align-items:center;cursor:pointer;padding:4px 0;border-radius:6px;transition:background 0.2s}.json-node-header:hover{background:rgba(255,255,255,0.05)}.json-toggle{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;margin-right:6px;color:#a0a0c0;font-size:12px}.json-key{color:#9cdcfe;font-weight:500;margin-right:8px}.json-colon{color:#a0a0c0;margin-right:8px}.json-value{color:#ce9178}.json-value.string{color:#ce9178}.json-value.number{color:#b5cea8}.json-value.boolean{color:#569cd6}.json-value.null{color:#569cd6}.json-preview{color:#6a9955;font-size:0.8rem;margin-left:8px}.json-children{display:block}.json-children.collapsed{display:none}.json-search-highlight{background:#fbbf24;color:#1e293b;border-radius:3px;padding:0 2px}.json-text-container{min-height:550px;max-height:550px;overflow-y:auto;background:#1a1a2e}.json-text-display{margin:0;padding:20px;font-family:'Fira Code',monospace;font-size:13px;line-height:1.6;color:#e0e0e0;white-space:pre-wrap;word-break:break-all}.viewer-modes{display:flex;gap:8px}.mode-btn{background:transparent;border:none;padding:4px 12px;border-radius:30px;font-size:0.7rem;cursor:pointer;transition:all 0.2s;color:var(--gray-500)}.mode-btn.active{background:var(--primary-color);color:white}.stats-cards{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;margin-top:20px}.stat-card{background:white;border-radius:16px;padding:16px;display:flex;align-items:center;gap:14px;border:1px solid var(--gray-200);transition:all 0.2s}.stat-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.05)}.stat-icon{width:44px;height:44px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--primary-color);font-size:1.2rem}.stat-info{flex:1}.stat-label{display:block;font-size:0.7rem;color:var(--gray-500);margin-bottom:4px}.stat-value{display:block;font-size:1.2rem;font-weight:700;color:var(--gray-800)}.panel-footer{padding:10px 20px;background:var(--gray-50);border-top:1px solid var(--gray-200);display:flex;justify-content:space-between;font-size:0.7rem;color:var(--gray-500)}.status-valid{color:#10b981}.status-invalid{color:#ef4444}@media (max-width:900px){.viewer-container{grid-template-columns:1fr}.viewer-toolbar{flex-direction:column;align-items:stretch;border-radius:20px}.toolbar-group{justify-content:center}.search-wrapper{flex:1}.search-wrapper input{width:100%}.stats-cards{grid-template-columns:repeat(2, 1fr)}}@media (max-width:480px){.stats-cards{grid-template-columns:1fr}.toolbar-group{flex-wrap:wrap}.tool-btn{padding:6px 14px;font-size:0.7rem}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.json-node{animation:fadeIn 0.2s ease}