:root{--font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "Roboto", "Oxygen", "Ubuntu", sans-serif;--font-mono: "Consolas", "Monaco", "Courier New", monospace;--green-600: #107c41;--green-700: #0b5a30;--green-100: #dcefc8;--gray-900: #242424;--gray-700: #424242;--gray-600: #616161;--gray-500: #757575;--gray-400: #9e9e9e;--gray-300: #e0e0e0;--gray-200: #f0f0f0;--gray-100: #f8f9fa;--white: #ffffff;--bg-app: #f8f9fa;--bg-surface: #ffffff;--bg-header: #ffffff;--bg-row-even: #fafafa;--bg-hover: #f1f1f1;--bg-selected: #e8f5e9;--bg-header-cell: #f8f9fa;--text-primary: #242424;--text-secondary: #616161;--text-muted: #9e9e9e;--border-light: #e0e0e0;--border-medium: #d0d0d0;--border-header: #cacaca;--accent: #107c41;--accent-hover: #0b5a30;--accent-soft: #dcefc8;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 2px 8px rgba(0,0,0,.08);--row-height: 28px;--header-height: 40px;--toolbar-height: 48px;--topbar-height: 48px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:13px}body{background:var(--bg-app);color:var(--text-primary);font-family:var(--font-sans);line-height:1.4;min-height:100vh}#app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.app-header{background:var(--bg-header);border-bottom:1px solid var(--border-light);flex:0 0 auto;box-shadow:var(--shadow-sm);z-index:10}.app-header-inner{display:flex;align-items:center;gap:12px;padding:0 16px;height:var(--topbar-height)}.app-logo{width:32px;height:32px;background:var(--accent);border-radius:4px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px;font-family:var(--font-sans)}.app-name{font-weight:600;font-size:1.1rem;color:var(--text-primary)}#upload-section{flex:1;display:flex;align-items:center;justify-content:center;padding:40px}.empty-card{background:var(--bg-surface);border:1px solid var(--border-light);border-radius:8px;padding:48px;text-align:center;max-width:520px;box-shadow:var(--shadow-md)}.empty-logo{margin-bottom:16px}.empty-title{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-lede{color:var(--text-secondary);font-size:.95rem;margin-bottom:24px;line-height:1.5}.empty-tabs{display:flex;gap:8px;margin-bottom:24px;background:var(--gray-100);padding:4px;border-radius:6px}.empty-tab{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border:none;background:transparent;color:var(--text-secondary);font-size:.9rem;font-weight:500;border-radius:4px;cursor:pointer;transition:all .15s ease}.empty-tab:hover{background:var(--bg-surface);color:var(--text-primary)}.empty-tab.is-active{background:var(--bg-surface);color:var(--text-primary);box-shadow:var(--shadow-sm)}.empty-tab-pane{display:none}.empty-tab-pane.is-active{display:block}.empty-dropzone{border:2px dashed var(--border-medium);border-radius:8px;padding:48px 24px;background:var(--gray-100);cursor:pointer;transition:all .2s ease}.empty-dropzone:hover,.empty-dropzone.drag-over{border-color:var(--accent);background:var(--accent-soft)}.empty-dropzone-title{margin-top:16px;color:var(--text-primary);font-size:1rem}.empty-dropzone-title .link{color:var(--accent);text-decoration:underline}.empty-dropzone-hint{margin-top:8px;color:var(--text-muted);font-size:.85rem}.empty-url{display:flex;gap:8px;align-items:center}.empty-url-input{flex:1;padding:10px 12px;border:1px solid var(--border-medium);border-radius:4px;font-size:.95rem;outline:none}.empty-url-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.empty-url-go{padding:10px 20px;background:var(--accent);color:#fff;border:none;border-radius:4px;font-weight:500;cursor:pointer;transition:background .15s}.empty-url-go:hover:not(:disabled){background:var(--accent-hover)}.empty-url-go:disabled{opacity:.5;cursor:not-allowed}.empty-url-hint{margin-top:12px;color:var(--text-muted);font-size:.85rem}.empty-assurances{display:flex;justify-content:center;gap:24px;margin-top:24px;color:var(--text-secondary);font-size:.85rem}.empty-assurances span{display:flex;align-items:center;gap:6px}.loading-state,.empty-error{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:60px;color:var(--text-secondary)}.spinner{width:32px;height:32px;border:3px solid var(--gray-200);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-error{color:#d32f2f;background:#ffebee;border:1px solid #ffcdd2;border-radius:8px;padding:24px 32px}.empty-error svg{width:20px;height:20px}.hidden{display:none!important}#viewer-section{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-surface)}.viewer-content{flex:1;display:flex;flex-direction:column;overflow:hidden}.viewer-topbar{display:flex;align-items:center;justify-content:space-between;height:var(--topbar-height);padding:0 16px;background:var(--bg-surface);border-bottom:1px solid var(--border-light);flex:0 0 auto}.topbar-left,.topbar-right{display:flex;align-items:center;gap:12px}.topbar-center{flex:1;display:flex;justify-content:center}.topbar-filename{font-weight:500;color:var(--text-primary);font-size:.95rem}.row-badge{background:var(--gray-100);padding:4px 12px;border-radius:12px;font-size:.8rem;color:var(--text-secondary);font-weight:500}.topbar-btn{display:flex;align-items:center;gap:6px;padding:8px 12px;background:transparent;border:1px solid var(--border-light);border-radius:4px;color:var(--text-secondary);font-size:.85rem;font-weight:500;cursor:pointer;transition:all .15s}.topbar-btn:hover{background:var(--gray-100);border-color:var(--border-medium);color:var(--text-primary)}.schema-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--gray-100);border-bottom:1px solid var(--border-light);flex:0 0 auto;overflow-x:auto}.schema-label{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.schema-list{display:flex;gap:6px}.schema-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:var(--bg-surface);border:1px solid var(--border-light);border-radius:4px;font-size:.8rem;color:var(--text-secondary);white-space:nowrap}.schema-tag .type{color:var(--text-muted);font-size:.75rem;font-weight:500}.data-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--bg-surface);border-bottom:1px solid var(--border-light);flex:0 0 auto;gap:12px}.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:8px}.toolbar-btn{display:flex;align-items:center;gap:6px;padding:7px 12px;background:var(--bg-surface);border:1px solid var(--border-light);border-radius:4px;color:var(--text-secondary);font-size:.85rem;font-weight:500;cursor:pointer;transition:all .15s}.toolbar-btn:hover{background:var(--gray-100);border-color:var(--border-medium);color:var(--text-primary)}.columns-dropdown{position:relative}.columns-panel{position:absolute;top:100%;left:0;margin-top:4px;background:var(--bg-surface);border:1px solid var(--border-light);border-radius:6px;box-shadow:var(--shadow-md);min-width:200px;max-height:300px;overflow-y:auto;z-index:100}.columns-panel-header{padding:10px 12px;border-bottom:1px solid var(--border-light);font-size:.85rem}.columns-list{padding:6px}.column-check-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:4px;cursor:pointer;font-size:.85rem;color:var(--text-secondary)}.column-check-item:hover{background:var(--gray-100)}.column-check-item input[type=checkbox]{accent-color:var(--accent)}.filter-box{display:flex;align-items:center;gap:8px;padding:6px 10px;background:var(--gray-100);border:1px solid var(--border-light);border-radius:4px;min-width:200px}.filter-box svg{color:var(--text-muted);flex:0 0 14px}.filter-box input{flex:1;border:none;background:transparent;font-size:.85rem;outline:none;color:var(--text-primary)}.filter-box input::placeholder{color:var(--text-muted)}.pagination{display:flex;align-items:center;gap:8px}.page-btn{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--bg-surface);border:1px solid var(--border-light);border-radius:4px;cursor:pointer;transition:all .15s}.page-btn:hover:not(:disabled){background:var(--gray-100);border-color:var(--border-medium)}.page-btn:disabled{opacity:.4;cursor:not-allowed}.page-info{font-size:.85rem;color:var(--text-secondary);min-width:100px;text-align:center}.app-table-frame{flex:1;overflow:hidden;background:var(--bg-surface)}#table-scroll{height:100%;overflow:auto}#data-table{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:.8rem;table-layout:auto}#data-table thead{position:sticky;top:0;z-index:10}#data-table th{background:var(--bg-header-cell);border-right:1px solid var(--border-light);border-bottom:1px solid var(--border-header);padding:0 10px;height:var(--header-height);text-align:left;font-weight:600;font-size:.8rem;color:var(--text-secondary);cursor:pointer;user-select:none;white-space:nowrap;position:relative}#data-table th:last-child{border-right:none}#data-table th:hover{background:var(--gray-100)}#data-table th .sort-arrow{margin-left:4px;opacity:0;font-size:.7rem}#data-table th.sorted-asc .sort-arrow,#data-table th.sorted-desc .sort-arrow{opacity:1;color:var(--accent)}#data-table tbody tr{height:var(--row-height)}#data-table tbody tr:nth-child(2n){background:var(--bg-row-even)}#data-table tbody tr:hover{background:var(--bg-hover)}#data-table td{padding:0 10px;border-right:1px solid var(--border-light);border-bottom:1px solid var(--border-light);font-family:var(--font-mono);font-size:.8rem;color:var(--text-primary);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:middle;line-height:var(--row-height)}#data-table td:last-child{border-right:none}#data-table td.null{color:var(--text-muted);font-style:italic}.app-nav{display:flex;gap:4px;padding:0 16px;border-top:1px solid var(--border-light);background:var(--bg-header)}.nav-link{padding:10px 16px;color:var(--text-secondary);text-decoration:none;font-size:.9rem;font-weight:500;border-bottom:2px solid transparent;transition:all .15s}.nav-link:hover{color:var(--text-primary);background:var(--gray-100)}.nav-link:active,.nav-link.active{color:var(--accent);border-bottom-color:var(--accent)}.batch-section{flex:1;display:flex;align-items:flex-start;justify-content:center;padding:40px 20px;overflow-y:auto;background:var(--bg-app)}.batch-card{background:var(--bg-surface);border:1px solid var(--border-light);border-radius:8px;padding:32px;max-width:640px;width:100%;box-shadow:var(--shadow-md)}.batch-title{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:8px}.batch-subtitle{color:var(--text-secondary);font-size:.95rem;margin-bottom:24px}.batch-dropzone{border:2px dashed var(--border-medium);border-radius:8px;padding:48px 24px;background:var(--gray-100);cursor:pointer;text-align:center;transition:all .2s;display:flex;flex-direction:column;align-items:center}.batch-dropzone:hover,.batch-dropzone.drag-over{border-color:var(--accent);background:var(--accent-soft)}.batch-dropzone-title{margin-top:16px;font-size:1rem;color:var(--text-primary)}.batch-dropzone-hint{margin-top:8px;font-size:.85rem;color:var(--text-muted)}.batch-list{margin:20px 0;max-height:300px;overflow-y:auto;border:1px solid var(--border-light);border-radius:6px}.batch-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--border-light);font-size:.9rem}.batch-item:last-child{border-bottom:none}.batch-item-name{flex:1;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.batch-item-status{color:var(--text-muted);font-size:.85rem;margin:0 12px}.batch-item-remove{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:4px;transition:all .15s}.batch-item-remove:hover{background:var(--gray-100);color:#d32f2f}.batch-convert-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;background:var(--accent);color:#fff;border:none;border-radius:6px;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .15s}.batch-convert-btn:hover:not(:disabled){background:var(--accent-hover)}.batch-convert-btn:disabled{opacity:.5;cursor:not-allowed}.batch-progress{margin-top:16px;text-align:center}.progress-bar{height:6px;background:var(--gray-200);border-radius:3px;overflow:hidden;margin-bottom:8px}.progress-fill{height:100%;background:var(--accent);width:0%;transition:width .3s}.progress-text{font-size:.85rem;color:var(--text-secondary)}.info-section{flex:1;overflow-y:auto;padding:40px 20px;background:var(--bg-app)}.info-card{max-width:800px;margin:0 auto;background:var(--bg-surface);border:1px solid var(--border-light);border-radius:8px;padding:32px;box-shadow:var(--shadow-md)}.info-title{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:24px;padding-bottom:16px;border-bottom:2px solid var(--accent-soft)}.step{display:flex;gap:16px;margin-bottom:24px}.step-number{width:36px;height:36px;background:var(--accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;flex:0 0 36px}.step-content h3{font-size:1.05rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}.step-content p{color:var(--text-secondary);font-size:.95rem;line-height:1.6}.info-note{margin-top:24px;padding:16px;background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:4px;color:var(--text-secondary);font-size:.9rem}.faq-item{margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--border-light)}.faq-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.faq-item h3{font-size:1.05rem;font-weight:600;color:var(--text-primary);margin-bottom:8px}.faq-item p{color:var(--text-secondary);font-size:.95rem;line-height:1.6}.app-footer{padding:16px 20px;text-align:center;color:var(--text-muted);font-size:.85rem;border-top:1px solid var(--border-light);background:var(--bg-header)}.empty-features{display:flex;justify-content:center;gap:32px;margin-top:24px;padding-top:24px;border-top:1px solid var(--border-light)}.feature-item{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:.9rem}.feature-item svg{color:var(--accent)}