*{box-sizing:border-box;margin:0;padding:0}body{color:#1e293b;background:#f8fafc;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.5}.app{max-width:640px;margin:0 auto;padding:48px 24px}.app-header{margin-bottom:32px}.app-header h1{margin-bottom:8px;font-size:24px;font-weight:600}.subtitle{color:#64748b;font-size:14px}.app-main{flex-direction:column;gap:24px;display:flex}.upload-area{justify-content:center;display:flex}.file-input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.upload-button{color:#fff;cursor:pointer;background:#2563eb;border-radius:8px;align-items:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:500;transition:background .15s;display:inline-flex}.upload-button:hover{background:#1d4ed8}.file-list{background:#fff;border:1px solid #e2e8f0;border-radius:8px;overflow:hidden}.file-list-header{background:#f8fafc;border-bottom:1px solid #e2e8f0;justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.file-count{color:#475569;font-size:13px;font-weight:500}.drag-hint{color:#94a3b8;font-size:12px}.files{list-style:none}.file-item{cursor:grab;border-bottom:1px solid #e2e8f0;align-items:center;gap:12px;padding:12px 16px;transition:background .15s;display:flex}.file-item:last-child{border-bottom:none}.file-item:hover{background:#f8fafc}.file-item.dragging{opacity:.5;background:#eff6ff}.file-item.drag-over{background:#dbeafe;border-top:2px solid #2563eb}.file-order{color:#64748b;background:#f1f5f9;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:12px;font-weight:600;display:flex}.drag-handle{color:#94a3b8;cursor:grab;flex-shrink:0}.file-type{text-transform:uppercase;border-radius:4px;flex-shrink:0;padding:2px 8px;font-size:11px;font-weight:600}.file-type.pdf{color:#dc2626;background:#fef2f2}.file-type.docx{color:#2563eb;background:#eff6ff}.file-name{white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:14px;overflow:hidden}.remove-button{color:#94a3b8;cursor:pointer;background:0 0;border:none;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;transition:background .15s,color .15s;display:flex}.remove-button:hover{color:#dc2626;background:#fef2f2}.actions{flex-direction:column;align-items:center;gap:12px;display:flex}.merge-button{color:#fff;cursor:pointer;background:#059669;border:none;border-radius:8px;padding:14px 32px;font-size:15px;font-weight:600;transition:background .15s}.merge-button:hover:not(:disabled){background:#047857}.merge-button:disabled{cursor:not-allowed;background:#94a3b8}.api-key-section{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:16px}.api-key-label{color:#475569;margin-bottom:8px;font-size:13px;font-weight:500;display:block}.api-key-input{border:1px solid #e2e8f0;border-radius:6px;width:100%;padding:10px 12px;font-family:monospace;font-size:14px;transition:border-color .15s}.api-key-input:focus{border-color:#2563eb;outline:none}