.converter-container{display:flex;flex-direction:column;gap:24px}.section-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.section-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bg-subtle);border-bottom:1px solid var(--border);gap:12px;flex-wrap:wrap}.section-title{font-weight:600;font-size:.95rem;color:var(--text);display:flex;align-items:center;gap:8px}.section-title svg{width:18px;height:18px;color:var(--primary)}.section-badge{background:var(--primary);color:#fff;font-size:.7rem;font-weight:600;padding:3px 8px;border-radius:100px}.options-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.option-group{display:flex;align-items:center;gap:8px}.option-group label{font-size:.8rem;color:var(--text-secondary);font-weight:500}.option-group select,.option-group input[type=text]{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font-family:inherit;font-size:.85rem;min-width:120px}.option-group select:focus,.option-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.option-group input[type=text]{width:60px;min-width:60px;text-align:center;font-family:JetBrains Mono,monospace}.checkbox-group{display:flex;align-items:center;gap:6px;cursor:pointer}.checkbox-group input[type=checkbox]{width:16px;height:16px;accent-color:var(--primary);cursor:pointer}.checkbox-group span{font-size:.8rem;color:var(--text-secondary);font-weight:500}.input-area{position:relative}.input-area textarea{width:100%;min-height:200px;max-height:300px;padding:20px;border:none;resize:vertical;background:transparent;color:var(--text);font-family:JetBrains Mono,SF Mono,Consolas,monospace;font-size:.85rem;line-height:1.6}.input-area textarea:focus{outline:none}.input-area textarea::placeholder{color:var(--text-muted)}.preview-wrapper{overflow-x:auto;max-height:350px;overflow-y:auto}.preview-table{width:100%;border-collapse:collapse;font-size:.85rem}.preview-table th,.preview-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);border-right:1px solid var(--border);white-space:nowrap;max-width:250px;overflow:hidden;text-overflow:ellipsis}.preview-table th:last-child,.preview-table td:last-child{border-right:none}.preview-table th{background:var(--bg-subtle);font-weight:600;color:var(--text);position:sticky;top:0;z-index:10;cursor:grab}.preview-table th:active{cursor:grabbing}.preview-table th.dragging{opacity:.5;background:var(--primary-glow)}.preview-table th .col-index{font-size:.65rem;color:var(--text-muted);font-weight:400;margin-left:6px}.preview-table td{color:var(--text-secondary);transition:all .15s}.preview-table td:focus{outline:none;background:#fff!important;color:var(--text);border-color:var(--primary);box-shadow:inset 0 0 0 2px var(--primary)}[data-theme=dark] .preview-table td:focus{background:var(--surface)!important}.preview-table tr:hover td{background:var(--bg-subtle)}.preview-table .row-num{color:var(--text-muted);font-size:.75rem;text-align:center;width:40px;background:var(--bg-subtle);font-family:JetBrains Mono,monospace}.preview-empty{padding:60px 20px;text-align:center;color:var(--text-muted)}.preview-empty svg{width:48px;height:48px;margin-bottom:12px;opacity:.5}.preview-stats{padding:12px 16px;background:var(--bg-subtle);border-top:1px solid var(--border);font-size:.75rem;color:var(--text-secondary);display:flex;justify-content:space-between;align-items:center}.preview-table th{position:relative}.preview-table th .header-content{display:flex;align-items:center;gap:6px}.preview-table th .header-text{flex:1;cursor:text;padding:4px 8px;border-radius:4px;border:1px solid transparent;min-width:40px;transition:all .15s}.preview-table th .header-text:hover{background:#00000026;border-color:#ffffff4d}.preview-table th .header-text:focus{outline:none;background:#fff;color:var(--text);border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.preview-table th .delete-col{opacity:0;width:20px;height:20px;padding:0;border:none;background:var(--error);color:#fff;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:opacity .15s,transform .15s;flex-shrink:0}.preview-table th:hover .delete-col{opacity:1}.preview-table th .delete-col:hover{transform:scale(1.15);background:#dc2626}.preview-table th .delete-col svg{width:12px;height:12px}.preview-table.col-delete-hover th[data-col].delete-target{background:#ef4444cc!important}.preview-table.col-delete-hover td.delete-target{background:#ef44441a!important;border-color:#ef44444d}[data-theme=dark] .preview-table.col-delete-hover td.delete-target{background:#ef444426!important}.preview-table tbody tr{transition:background .15s}.preview-table tbody tr:hover td{background:var(--bg-subtle)}.preview-table tbody tr:has(.row-num:hover) td{background:#ef44441a!important;border-color:#ef44444d}.preview-table .row-num{position:relative;cursor:pointer;transition:all .15s;user-select:none}.preview-table tbody tr:has(.row-num:hover) .row-num{background:#ef4444cc!important;color:#fff}.preview-table .row-num .delete-row{display:none;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.preview-table .row-num:hover .row-index{display:none}.preview-table .row-num:hover .delete-row{display:block}.preview-table .row-num .delete-row svg{width:14px;height:14px}[data-theme=dark] .preview-table th .header-text:hover{background:#ffffff1a;border-color:#fff3}[data-theme=dark] .preview-table th .header-text:focus{background:var(--surface);color:var(--text)}[data-theme=dark] .preview-table tbody tr:has(.row-num:hover){background:#ef444426!important}.output-area{position:relative}.output-area textarea{width:100%;min-height:150px;max-height:250px;padding:20px;border:none;resize:vertical;background:var(--bg-subtle);color:var(--text);font-family:JetBrains Mono,SF Mono,Consolas,monospace;font-size:.85rem;line-height:1.6}.output-area textarea:focus{outline:none}.output-actions{display:flex;gap:10px;padding:16px 20px;border-top:1px solid var(--border);flex-wrap:wrap}.output-actions button.primary{flex:1;min-width:140px}.convert-section{display:flex;justify-content:center;padding:8px 0}.convert-btn{padding:14px 32px;font-size:1rem;font-weight:600;background:linear-gradient(135deg,var(--primary) 0%,#8b5cf6 100%);color:#fff;border:none;border-radius:var(--radius-md);cursor:pointer;display:flex;align-items:center;gap:10px;transition:all var(--transition);box-shadow:0 4px 15px var(--primary-glow)}.convert-btn:hover{transform:translateY(-2px);box-shadow:0 6px 25px var(--primary-glow)}.convert-btn svg{width:20px;height:20px}.content-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;margin-bottom:24px}.content-section h2{font-size:1.3rem;font-weight:700;margin-bottom:16px;color:var(--text)}.content-section h3{font-size:1.1rem;font-weight:600;margin:20px 0 12px;color:var(--text)}.content-section p{color:var(--text-secondary);line-height:1.7;margin-bottom:12px}.content-section ul,.content-section ol{color:var(--text-secondary);line-height:1.7;margin:12px 0;padding-left:24px}.content-section li{margin-bottom:8px}.content-section code{background:var(--bg-subtle);padding:2px 6px;border-radius:4px;font-family:JetBrains Mono,monospace;font-size:.85em}.options-table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.9rem}.options-table th,.options-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}.options-table th{background:var(--bg-subtle);font-weight:600;color:var(--text)}.options-table td{color:var(--text-secondary)}.options-table tr:hover td{background:var(--bg-subtle)}.faq-item{border-bottom:1px solid var(--border);padding:20px 0}.faq-item:first-of-type{padding-top:0}.faq-item:last-of-type{border-bottom:none;padding-bottom:0}.faq-question{font-weight:600;font-size:1rem;color:var(--text);margin-bottom:8px;display:flex;align-items:flex-start;gap:10px}.faq-question:before{content:"P";background:var(--primary);color:#fff;font-size:.75rem;font-weight:700;padding:2px 8px;border-radius:4px;flex-shrink:0}.faq-answer{color:var(--text-secondary);line-height:1.7;padding-left:32px}.related-tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:16px}.related-tool-link{display:flex;align-items:center;gap:10px;padding:14px 16px;background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text);text-decoration:none;font-weight:500;font-size:.9rem;transition:all var(--transition)}.related-tool-link:hover{border-color:var(--primary);background:var(--surface);transform:translate(4px)}.related-tool-link svg{width:18px;height:18px;color:var(--primary);flex-shrink:0}@media(max-width:768px){.section-header{flex-direction:column;align-items:flex-start;gap:12px}.options-row{width:100%}.option-group{flex:1;min-width:0}.option-group select{flex:1;min-width:100px}.preview-table th,.preview-table td{padding:8px 10px;font-size:.8rem}.output-actions{flex-direction:column}.output-actions button{width:100%}}@media(max-width:480px){.input-area textarea{min-height:150px}}