.csv-container{display:grid;grid-template-columns:360px 1fr;gap:24px;margin-bottom:24px}.input-section{background:linear-gradient(135deg, #fff, #f8fafc);border-radius:24px;padding:20px;border:1px solid rgba(0,0,0,0.05);box-shadow:0 4px 20px rgba(0,0,0,0.03)}.upload-area{border:2px dashed var(--gray-300);border-radius:20px;padding:30px 20px;text-align:center;cursor:pointer;transition:all 0.3s;margin-bottom:16px}.upload-area:hover{border-color:var(--primary-color);background:var(--gray-50)}.upload-area i{font-size:48px;color:var(--gray-400);margin-bottom:12px}.upload-hint{font-size:0.7rem;color:var(--gray-400);display:block;margin:8px 0}.upload-buttons{display:flex;gap:12px;justify-content:center;margin-top:16px}.file-info{background:var(--gray-50);border-radius:16px;padding:16px;margin:16px 0}.info-row{display:flex;align-items:center;gap:8px;font-size:0.8rem;color:var(--gray-600);padding:6px 0}.info-row i{width:24px;color:var(--primary-color)}.convert-options{background:var(--gray-50);border-radius:16px;padding:16px;margin:16px 0}.option-title{font-weight:600;margin-bottom:12px;color:var(--gray-700);font-size:0.85rem}.option-group{margin-bottom:16px}.option-group label{font-size:0.8rem;color:var(--gray-600);display:block;margin-bottom:8px}.format-buttons{display:flex;gap:10px;flex-wrap:wrap}.format-btn{background:white;border:1px solid var(--gray-200);padding:6px 16px;border-radius:30px;font-size:0.75rem;cursor:pointer;transition:all 0.2s}.format-btn.active{background:var(--primary-color);color:white;border-color:var(--primary-color)}.convert-btn{width:100%;padding:12px;border-radius:50px;margin-top:8px}.result-section{background:var(--gray-50);border-radius:24px;overflow:hidden}.preview-tabs{display:flex;background:white;border-bottom:1px solid var(--gray-200);padding:0 20px}.preview-tab{background:transparent;border:none;padding:14px 24px;font-size:0.85rem;cursor:pointer;color:var(--gray-500);position:relative;transition:all 0.2s}.preview-tab.active{color:var(--primary-color)}.preview-tab.active::after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--primary-color)}.preview-panel{padding:20px}.json-output{background:#1a1a2e;color:#e0e0e0;padding:16px;border-radius:16px;font-family:'Fira Code',monospace;font-size:12px;line-height:1.5;max-height:500px;overflow:auto;white-space:pre-wrap;word-break:break-all;margin:0}.table-wrapper{max-height:500px;overflow:auto;border-radius:12px;border:1px solid var(--gray-200);background:white}.data-table{width:100%;border-collapse:collapse;font-size:0.75rem}.data-table th,.data-table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--gray-200);white-space:nowrap}.data-table th{background:var(--gray-100);font-weight:600;position:sticky;top:0;z-index:10}.data-table tr:hover{background:var(--gray-50)}.schema-info{background:white;border-radius:16px;padding:16px;font-family:monospace;font-size:0.8rem}.schema-item{padding:8px 0;border-bottom:1px solid var(--gray-200);display:flex;gap:16px}.schema-key{font-weight:600;color:var(--primary-color);min-width:120px}.schema-type{color:var(--gray-500)}.schema-example{color:var(--gray-600);word-break:break-all}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.panel-actions{display:flex;gap:8px}.action-btn-sm,.stats-badge{background:var(--gray-100);border:none;padding:4px 12px;border-radius:20px;font-size:0.7rem;cursor:pointer;color:var(--gray-600)}.action-btn-sm:hover{background:var(--gray-200);color:var(--primary-color)}.empty-placeholder{text-align:center;padding:40px;color:var(--gray-400)}@media (max-width:900px){.csv-container{grid-template-columns:1fr}.preview-tabs{overflow-x:auto}.data-table th,.data-table td{font-size:0.7rem;padding:6px 8px}}