:root{--font-sans:"Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-card:#ffffffd9;--bg-glass:#ffffffb3;--border-color:#e2e8f0;--border-hover:#cbd5e1;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--accent-primary:#6366f1;--accent-primary-hover:#4f46e5;--accent-secondary:#8b5cf6;--accent-gradient:linear-gradient(135deg, #6366f1 0%, #a855f7 100%);--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -1px #0000000a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-glow:0 0 20px #6366f159;--radius-sm:8px;--radius-md:12px;--radius-lg:18px;--radius-full:9999px;--transition:all .2s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-primary:#0b0f17;--bg-secondary:#131b2e;--bg-card:#131b2ed9;--bg-glass:#0f172abf;--border-color:#1e293b;--border-hover:#334155;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--accent-primary:#818cf8;--accent-primary-hover:#6366f1;--accent-gradient:linear-gradient(135deg, #818cf8 0%, #c084fc 100%);--shadow-sm:0 1px 2px 0 #0000004d;--shadow-md:0 4px 6px -1px #0006;--shadow-lg:0 10px 25px -5px #00000080;--shadow-glow:0 0 25px #818cf866}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.5}.app-container{flex-direction:column;min-height:100vh;padding-bottom:90px;display:flex}.app-header{z-index:40;background:var(--bg-glass);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);position:sticky;top:0}.header-container{justify-content:space-between;align-items:center;gap:16px;max-width:1300px;margin:0 auto;padding:12px 24px;display:flex}.brand{align-items:center;gap:12px;display:flex}.logo-icon{background:var(--accent-gradient);border-radius:var(--radius-md);width:44px;height:44px;box-shadow:var(--shadow-glow);justify-content:center;align-items:center;display:flex}.brand-text{align-items:baseline;gap:8px;display:flex}.brand-text .title{letter-spacing:-.02em;font-size:1.35rem;font-weight:800}.gradient-text{background:var(--accent-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.version-badge{text-transform:uppercase;letter-spacing:.05em;color:var(--accent-primary);border-radius:var(--radius-full);background:#6366f11f;padding:2px 8px;font-size:.72rem;font-weight:700}.privacy-pill{color:var(--success);border-radius:var(--radius-full);background:#10b9811a;border:1px solid #10b98133;align-items:center;gap:6px;padding:6px 14px;font-size:.82rem;font-weight:600;display:flex}.header-actions{align-items:center;gap:10px;display:flex}.nav-tabs-container{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:8px 24px}.nav-tabs-scroll{scrollbar-width:thin;align-items:center;gap:6px;max-width:1300px;margin:0 auto;padding-bottom:2px;display:flex;overflow-x:auto}.nav-tab-btn{color:var(--text-secondary);border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;transition:var(--transition);background:0 0;border:1px solid #0000;align-items:center;gap:6px;padding:7px 14px;font-size:.84rem;font-weight:600;display:inline-flex}.nav-tab-btn:hover{color:var(--text-primary);background:var(--bg-primary)}.nav-tab-btn.active{color:var(--accent-primary);background:#6366f11a;border-color:#6366f140;font-weight:700}.signature-pad-container{flex-direction:column;gap:8px;display:flex}.signature-canvas-wrapper{border:2px dashed var(--border-color);border-radius:var(--radius-md);background:#fff;justify-content:center;align-items:center;width:100%;max-width:450px;height:160px;display:flex;position:relative}.signature-canvas{cursor:crosshair;width:100%;height:100%}.canvas-placeholder{pointer-events:none;color:#94a3b8;font-size:.85rem;position:absolute}.btn{border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);white-space:nowrap;border:1px solid #0000;outline:none;justify-content:center;align-items:center;gap:8px;padding:9px 18px;font-family:inherit;font-size:.9rem;font-weight:600;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 12px #6366f14d}.btn-primary:hover:not(:disabled){opacity:.94;transform:translateY(-1px);box-shadow:0 6px 18px #6366f166}.btn-glow{box-shadow:var(--shadow-glow)}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border-color:var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--bg-primary);border-color:var(--border-hover)}.btn-ghost{color:var(--text-secondary);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--border-color);color:var(--text-primary)}.btn-icon{border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border-color);padding:9px}.btn-icon:hover:not(:disabled){color:var(--text-primary);border-color:var(--border-hover)}.btn-sm{border-radius:var(--radius-sm);padding:6px 12px;font-size:.82rem}.btn-xs{border-radius:var(--radius-sm);padding:4px 10px;font-size:.78rem}.btn-icon-sm{border-radius:var(--radius-sm);padding:5px}.danger-text{color:var(--danger)!important}.main-content{flex-direction:column;flex:1;gap:24px;width:100%;max-width:1300px;margin:0 auto;padding:24px;display:flex}.tool-container{flex-direction:column;gap:20px;display:flex}.tool-header{margin-bottom:4px}.tool-header h2{font-size:1.4rem;font-weight:800}.tool-header p{color:var(--text-secondary);font-size:.92rem}.tool-body-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);flex-direction:column;gap:20px;padding:24px;display:flex}.tool-footer-actions{border-top:1px dashed var(--border-color);justify-content:flex-end;gap:12px;padding-top:16px;display:flex}.dropzone-container{width:100%}.dropzone{background:var(--bg-card);border:2px dashed var(--border-color);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:var(--transition);box-shadow:var(--shadow-sm);padding:48px 24px}.dropzone-compact{padding:28px 16px}.dropzone:hover,.dropzone.drag-over{border-color:var(--accent-primary);background:#6366f10a;transform:scale(1.005)}.upload-icon{color:var(--accent-primary);margin-bottom:8px}.file-list-card{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-secondary);overflow:hidden}.file-list-header{background:var(--bg-primary);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:10px 16px;font-size:.85rem;font-weight:700;display:flex}.file-list{divide-y:1px solid var(--border-color);flex-direction:column;display:flex}.file-item-row{border-bottom:1px solid var(--border-color);align-items:center;gap:12px;padding:10px 16px;display:flex}.file-item-index{background:var(--border-color);border-radius:50%;justify-content:center;align-items:center;width:22px;height:22px;font-size:.8rem;font-weight:700;display:flex}.file-item-details{flex-direction:column;flex:1;min-width:0;display:flex}.file-item-name{white-space:nowrap;text-overflow:ellipsis;font-size:.9rem;font-weight:600;overflow:hidden}.file-item-size{color:var(--text-muted);font-size:.78rem}.file-item-actions{gap:4px;display:flex}.active-file-row{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);align-items:center;gap:16px;padding:12px 16px;display:flex}.file-info{flex-direction:column;flex:1;display:flex}.file-sub{color:var(--text-muted);font-size:.8rem}.split-options-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;display:grid}.split-mode-card{background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);color:var(--text-primary);flex-direction:column;gap:8px;padding:20px;display:flex}.split-mode-card:hover{border-color:var(--border-hover)}.split-mode-card.active{border-color:var(--accent-primary);background:#6366f10d;box-shadow:0 0 0 2px #6366f133}.split-mode-card h4{font-size:1rem;font-weight:700}.split-mode-card p{color:var(--text-secondary);font-size:.84rem}.organize-workspace{flex-direction:column;gap:16px;display:flex}.workspace-header{background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.file-info-badge{align-items:center;gap:8px;font-weight:700;display:flex}.workspace-actions{gap:10px;display:flex}.organize-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;display:grid}.organize-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-direction:column;gap:8px;padding:10px;display:flex}.org-card-top{justify-content:space-between;align-items:center;font-size:.8rem;font-weight:700;display:flex}.org-thumb-box{aspect-ratio:1/1.3;border-radius:var(--radius-sm);background:#cbd5e1;justify-content:center;align-items:center;width:100%;display:flex;overflow:hidden}.org-canvas{object-fit:contain;max-width:100%;max-height:100%}.org-card-controls{justify-content:space-between;align-items:center;display:flex}.savings-card{border-radius:var(--radius-md);background:#10b9811a;border:1px solid #10b9814d;justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.savings-badge{color:var(--success);align-items:center;gap:10px;font-weight:700;display:flex}.savings-metrics{gap:16px;font-size:.85rem;display:flex}.text-editor-box{border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-secondary);overflow:hidden}.editor-header{background:var(--bg-primary);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.text-stats{color:var(--text-secondary);gap:8px;font-size:.82rem;display:flex}.editor-actions{gap:8px;display:flex}.text-textarea{width:100%;color:var(--text-primary);resize:vertical;background:0 0;border:none;outline:none;padding:16px;font-family:monospace;font-size:.88rem;line-height:1.6}.watermark-form-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;display:grid}.checkbox-setting-row{border-top:1px dashed var(--border-color);align-items:center;gap:16px;padding-top:12px;display:flex}.custom-checkbox-row{cursor:pointer;align-items:center;gap:8px;font-size:.88rem;font-weight:600;display:flex}.inline-select{width:auto}.settings-panel{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:20px}.panel-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;display:flex}.panel-title{align-items:center;gap:8px;font-size:1.05rem;font-weight:700;display:flex}.selection-counter{color:var(--accent-primary);border-radius:var(--radius-full);background:#6366f11a;padding:4px 12px;font-size:.85rem;font-weight:600}.settings-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:16px;display:grid}.setting-group{flex-direction:column;gap:6px;display:flex}.setting-label{color:var(--text-secondary);align-items:center;gap:6px;font-size:.85rem;font-weight:600;display:flex}.label-with-value{justify-content:space-between;align-items:center;display:flex}.value-badge{color:var(--accent-primary);font-size:.82rem;font-weight:700}.form-select,.form-input{border-radius:var(--radius-sm);background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border-color);transition:var(--transition);outline:none;width:100%;padding:8px 12px;font-family:inherit;font-size:.88rem}.form-select:focus,.form-input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f133}.form-slider{accent-color:var(--accent-primary);cursor:pointer}.setting-hint{color:var(--text-muted);font-size:.75rem}.color-picker-row{align-items:center;gap:8px;display:flex}.color-btn{border-radius:var(--radius-full);border:2px solid var(--border-color);cursor:pointer;width:32px;height:32px;transition:var(--transition)}.color-btn.active{border-color:var(--accent-primary);transform:scale(1.15);box-shadow:0 0 0 2px #6366f166}.custom-color-wrapper{align-items:center;gap:6px;margin-left:4px;display:flex}.color-input{border-radius:var(--radius-full);cursor:pointer;background:0 0;border:none;width:32px;height:32px}.color-hex{color:var(--text-muted);font-family:monospace;font-size:.78rem}.input-group{gap:6px;display:flex}.batch-actions-bar{border-top:1px dashed var(--border-color);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding-top:12px;display:flex}.batch-label{color:var(--text-muted);font-size:.8rem;font-weight:600}.batch-buttons{gap:6px;display:flex}.page-grid-container{width:100%}.page-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;display:grid}.page-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:var(--transition);cursor:pointer;flex-direction:column;display:flex;position:relative;overflow:hidden}.page-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md);transform:translateY(-2px)}.page-card.selected{border-color:var(--accent-primary);box-shadow:0 0 0 2px var(--accent-primary), var(--shadow-md)}.card-top-bar{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.custom-checkbox{cursor:pointer;width:18px;height:18px;display:inline-block;position:relative}.custom-checkbox input{opacity:0;width:0;height:0}.checkmark{background-color:var(--bg-primary);border:1.5px solid var(--border-color);width:18px;height:18px;transition:var(--transition);border-radius:4px;position:absolute;top:0;left:0}.custom-checkbox:hover input~.checkmark{border-color:var(--accent-primary)}.custom-checkbox input:checked~.checkmark{background-color:var(--accent-primary);border-color:var(--accent-primary)}.checkmark:after{content:"";border:2px solid #fff;border-width:0 2px 2px 0;width:4px;height:8px;display:none;position:absolute;top:2px;left:5px;transform:rotate(45deg)}.custom-checkbox input:checked~.checkmark:after{display:block}.page-badge{color:var(--text-secondary);font-size:.78rem;font-weight:700}.rotation-badge{color:var(--warning);border-radius:var(--radius-sm);background:#f59e0b26;padding:1px 6px;font-size:.7rem;font-weight:600}.thumbnail-container{aspect-ratio:1/1.3;background:#cbd5e1;justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}.thumbnail-canvas{object-fit:contain;max-width:100%;max-height:100%}.thumbnail-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);opacity:0;transition:var(--transition);background:#0f172a73;justify-content:center;align-items:center;gap:12px;display:flex;position:absolute;inset:0}.page-card:hover .thumbnail-overlay{opacity:1}.overlay-btn{border-radius:var(--radius-full);color:#0f172a;cursor:pointer;width:38px;height:38px;transition:var(--transition);background:#ffffffe6;border:none;justify-content:center;align-items:center;display:flex}.overlay-btn:hover{background:#fff;transform:scale(1.1)}.card-footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.dimensions-text{color:var(--text-muted);font-size:.72rem}.card-footer-actions{gap:4px;display:flex}.page-grid-skeleton{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;display:grid}.page-card-skeleton{background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-color);height:280px}.animate-pulse{animation:1.5s cubic-bezier(.4,0,.6,1) infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.modal-backdrop{z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#000000bf;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:90vw;max-width:1000px;height:85vh;box-shadow:var(--shadow-lg);flex-direction:column;display:flex;overflow:hidden}.modal-header{border-bottom:1px solid var(--border-color);background:var(--bg-glass);justify-content:space-between;align-items:center;gap:16px;padding:14px 20px;display:flex}.modal-title{align-items:baseline;gap:8px;font-size:1.1rem;font-weight:700;display:flex}.page-total-text{color:var(--text-muted);font-size:.85rem;font-weight:500}.modal-zoom-controls{background:var(--bg-primary);border-radius:var(--radius-md);border:1px solid var(--border-color);align-items:center;gap:8px;padding:4px 10px;display:flex}.zoom-text{text-align:center;min-width:44px;font-size:.8rem;font-weight:700}.modal-actions{align-items:center;gap:10px;display:flex}.modal-body{background:#0f172a;flex:1;justify-content:center;align-items:center;padding:24px;display:flex;position:relative;overflow:auto}.preview-image-container{justify-content:center;align-items:center;transition:transform .2s ease-out;display:flex}.preview-img{object-fit:contain;border-radius:4px;max-width:100%;max-height:70vh;transition:transform .2s ease-out;box-shadow:0 10px 30px #00000080}.nav-arrow{z-index:10;border-radius:var(--radius-full);color:#fff;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);cursor:pointer;width:48px;height:48px;transition:var(--transition);background:#fff3;border:1px solid #ffffff4d;justify-content:center;align-items:center;display:flex;position:absolute;top:50%;transform:translateY(-50%)}.nav-arrow:hover{background:#fff6;transform:translateY(-50%)scale(1.1)}.nav-prev{left:16px}.nav-next{right:16px}.rendering-spinner{color:#fff;flex-direction:column;align-items:center;gap:12px;font-size:.9rem;display:flex}.spinner-ring{border:3px solid #fff3;border-top-color:var(--accent-primary);border-radius:50%;width:36px;height:36px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.export-toolbar-sticky{z-index:50;background:var(--bg-glass);-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--border-color);padding:12px 24px;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -4px 20px #0000001a}.export-toolbar-container{justify-content:space-between;align-items:center;gap:20px;max-width:1300px;margin:0 auto;display:flex}.status-info{align-items:center;gap:12px;display:flex}.progress-info{align-items:center;gap:10px;display:flex}.progress-text-wrapper{flex-direction:column;display:flex}.status-title{font-size:.9rem;font-weight:700}.status-sub{color:var(--text-muted);font-size:.75rem}.spin-icon{color:var(--accent-primary);animation:1s linear infinite spin}.success-icon{color:var(--success)}.progress-bar-wrapper{flex:1;align-items:center;gap:12px;max-width:320px;display:flex}.progress-track{background:var(--border-color);border-radius:var(--radius-full);flex:1;height:8px;overflow:hidden}.progress-fill{background:var(--accent-gradient);border-radius:var(--radius-full);height:100%;transition:width .2s ease-out}.progress-percentage{color:var(--accent-primary);min-width:36px;font-size:.8rem;font-weight:700}.export-actions{align-items:center;gap:12px;display:flex}@media (width<=768px){.header-container{flex-wrap:wrap}.privacy-pill{display:none}.export-toolbar-container{flex-direction:column;align-items:stretch;gap:12px}.export-actions{justify-content:stretch}.export-actions .btn{flex:1}}