.hidden{display:none!important}.excel-tool-container{width:100%;max-width:1400px;margin:0 auto;padding:2rem;font-family:Inter,system-ui,sans-serif}.upload-area{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;background:#fff;border:2px dashed #cbd5e1;border-radius:1.5rem;cursor:pointer;transition:all .3s ease;max-width:800px;margin:2rem auto}.upload-area:hover{border-color:var(--primary-color);background:#fff9f9;box-shadow:0 10px 30px -10px #0000001a}.upload-title{font-size:1.5rem;font-weight:700;color:#1f2937;margin-bottom:.5rem;margin-top:2rem}.upload-desc{color:var(--text-muted);text-align:center;margin-bottom:2rem;max-width:500px;line-height:1.6}.upload-icon{width:4rem;height:4rem;color:#16a34a;background:#dcfce7;border-radius:1rem;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;transition:transform .3s ease}.upload-area:hover .upload-icon{transform:scale(1.1) rotate(5deg)}.upload-btn{padding:.8rem 2.5rem;background:var(--primary-color);color:#fff;border-radius:50px;font-weight:600;font-size:1.1rem;display:flex;align-items:center;gap:.5rem;border:none;cursor:pointer;box-shadow:0 4px 15px #e5322d4d;transition:all .2s;margin-bottom:2rem}.upload-btn:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 20px #e5322d66}.tool-workspace{display:flex;flex-direction:column;gap:2rem;align-items:flex-start}@media(min-width:1024px){.tool-workspace{flex-direction:row-reverse}}.tool-sidebar{width:100%;display:flex;flex-direction:column;gap:1.5rem}@media(min-width:1024px){.tool-sidebar{width:340px;flex-shrink:0;position:sticky;top:2rem}}.tool-preview{flex:1;min-width:0;width:100%;background:#525659;border-radius:.5rem;padding:2rem;display:flex;flex-direction:column;align-items:center;min-height:800px;border:1px solid #454545}.tool-card{background:#fff;padding:1.5rem;border-radius:1rem;box-shadow:0 1px 2px #0000000d;border:1px solid #e5e7eb}.file-info{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.file-icon{width:3rem;height:3rem;background:#dcfce7;color:#16a34a;border-radius:.75rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}.remove-btn{padding:.5rem;color:#94a3b8;border:none;background:transparent;cursor:pointer;border-radius:.5rem;transition:all .2s}.remove-btn:hover{color:#ef4444;background:#fee2e2}.sheet-list{display:flex;flex-direction:column;gap:.5rem;max-height:250px;overflow-y:auto;padding-right:.5rem}.sheet-item{display:flex;align-items:center;gap:.75rem;padding:.75rem;border-radius:.75rem;border:1px solid transparent;cursor:pointer;transition:all .2s;background:#f8fafc}.sheet-item:hover{background:#f1f5f9}.sheet-item.selected{background:#eff6ff;border-color:#bfdbfe}.checkbox-visual{width:1.25rem;height:1.25rem;border-radius:.25rem;border:2px solid #cbd5e1;display:flex;align-items:center;justify-content:center;background:#fff;transition:all .2s}.sheet-item.selected .checkbox-visual{background:var(--primary-color);border-color:var(--primary-color);color:#fff}.settings-grid{display:grid;gap:1.25rem}.option-btn-grp{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}.option-btn{padding:.75rem;border:1px solid #e2e8f0;background:#f8fafc;border-radius:.75rem;cursor:pointer;font-size:.875rem;font-weight:500;color:#64748b;display:flex;align-items:center;justify-content:center;gap:.5rem;transition:all .2s}.option-btn:hover{background:#f1f5f9}.option-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.tool-select{width:100%;padding:.75rem;background:#f8fafc;border:1px solid #e2e8f0;border-radius:.75rem;font-size:.875rem;color:#1f2937;outline:none;transition:border-color .2s}.tool-select:focus{border-color:var(--primary-color);background:#fff}.convert-btn{width:100%;padding:1rem;background:var(--primary-color);color:#fff;border:none;border-radius:1rem;font-size:1.125rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.75rem;box-shadow:0 4px 6px -1px #e5322d4d;transition:all .2s}.convert-btn:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 15px -3px #e5322d66}.convert-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;background:#94a3b8}.preview-container{width:100%;height:100%;overflow:auto;display:flex;justify-content:center;padding:2rem}.preview-paper{background:#fff;box-shadow:0 4px 15px #0000004d;transition:all .3s cubic-bezier(.25,.8,.25,1);min-height:800px;padding:40px;box-sizing:border-box;overflow:hidden}.preview-table{width:100%;border-collapse:collapse;font-size:10px;font-family:Inter,sans-serif;table-layout:fixed}.preview-table th{background:#f1f5f9;color:#334155;font-weight:700;text-transform:uppercase;font-size:9px;letter-spacing:.05em;padding:8px 4px;border-bottom:2px solid #cbd5e1;text-align:left;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.preview-table td{padding:6px 4px;color:#475569;border-bottom:1px solid #e2e8f0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.preview-table.grid-on th,.preview-table.grid-on td{border:1px solid #cbd5e1}.preview-table tr:nth-child(2n){background:#f8fafc}.sheet-list::-webkit-scrollbar,.preview-container::-webkit-scrollbar{width:6px;height:6px}.sheet-list::-webkit-scrollbar-thumb,.preview-container::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}