:root{--font-family:"Inter", sans-serif;--bg-main:#f9fafb;--bg-panel:#fff;--text-primary:#111827;--text-secondary:#4b5563;--border-color:#e5e7eb;--border-focus:#3b82f6;--primary-color:#000;--primary-hover:#1f2937;--primary-text:#fff;--danger-color:#ef4444;--success-color:#10b981;--neutral-color:#f3f4f6;--neutral-hover:#e5e7eb;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--shadow-premium:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--transition-fast:.15s ease;--transition-normal:.25s ease}@media (prefers-color-scheme:dark){:root{--bg-main:#0f1115;--bg-panel:#1a1d24;--text-primary:#f9fafb;--text-secondary:#9ca3af;--border-color:#374151;--border-focus:#60a5fa;--primary-color:#fff;--primary-hover:#e5e7eb;--primary-text:#000;--neutral-color:#374151;--neutral-hover:#4b5563;--shadow-premium:0 20px 25px -5px #00000080, 0 8px 10px -6px #00000080}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-main);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}#app{flex-direction:column;max-width:1200px;min-height:100vh;margin:0 auto;padding:40px 24px;display:flex}.header{text-align:center;margin-bottom:40px}.header h1{letter-spacing:-.025em;margin-bottom:8px;font-size:2.5rem;font-weight:700}.header p{color:var(--text-secondary);font-size:1.125rem}.main-grid{grid-template-columns:1fr;align-items:start;gap:32px;display:grid}@media (width>=900px){.main-grid{grid-template-columns:1.2fr 1fr;gap:48px}}.panel{background:var(--bg-panel);border-radius:var(--radius-xl);box-shadow:var(--shadow-premium);border:1px solid 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center;background-repeat:no-repeat;background-size:16px;padding-right:40px}textarea.form-control{resize:vertical;min-height:100px}.form-control.is-invalid{border-color:var(--danger-color)}.error-message{color:var(--danger-color);margin-top:4px;font-size:.75rem;display:none}.form-control.is-invalid+.error-message{display:block}.qr-preview-container{background:var(--bg-main);border-radius:var(--radius-lg);border:1px solid var(--border-color);flex-direction:column;justify-content:center;align-items:center;min-height:300px;margin-bottom:24px;padding:40px;display:flex;position:relative}#qr-preview{border-radius:var(--radius-sm);box-shadow:var(--shadow-md);transition:opacity var(--transition-fast);background:#fff;justify-content:center;align-items:center;padding:16px;display:flex}.qr-placeholder{color:var(--text-secondary);text-align:center;font-size:.875rem}.btn{border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-family:inherit;font-size:.95rem;font-weight:500;display:inline-flex}.btn-primary{background:var(--primary-color);color:var(--primary-text)}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn-secondary{background:var(--neutral-color);color:var(--text-primary)}.btn-secondary:hover{background:var(--neutral-hover)}.btn-block{width:100%}.actions-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.privacy-promise{border-left:4px solid var(--success-color);border-radius:0 var(--radius-md) var(--radius-md) 0;background:#10b9811a;align-items:flex-start;gap:12px;margin-top:32px;padding:16px;display:flex}.privacy-promise svg{color:var(--success-color);flex-shrink:0;margin-top:2px}.privacy-promise-content h4{color:var(--text-primary);margin-bottom:4px;font-size:.95rem;font-weight:600}.privacy-promise-content p{color:var(--text-secondary);margin:0;font-size:.875rem}.settings-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.color-picker-wrapper{align-items:center;gap:12px;display:flex}.color-picker{appearance:none;border-radius:var(--radius-sm);cursor:pointer;background:0 0;border:none;width:40px;height:40px;padding:0}.color-picker::-webkit-color-swatch-wrapper{padding:0}.color-picker::-webkit-color-swatch{border:1px solid var(--border-color);border-radius:var(--radius-sm)}.toggle-wrapper{cursor:pointer;align-items:center;gap:12px;display:flex}.toggle-wrapper input{width:18px;height:18px;accent-color:var(--primary-color)}input[type=range]{width:100%;accent-color:var(--primary-color)}.batch-section{margin-top:40px}@media (width<=768px){#app{padding:16px 12px}.panel{border-radius:var(--radius-lg);padding:16px}.header{margin-bottom:24px}.header h1{font-size:2rem}.main-grid{gap:16px}.settings-grid{grid-template-columns:1fr;gap:12px}.actions-grid{grid-template-columns:1fr;gap:8px}.qr-preview-container{min-height:200px;padding:24px}.batch-section{margin-top:24px}}#app{max-width:100%!important}.pdftool-app{background-color:var(--bg-color);min-height:100vh}.sidebar{background:var(--bg-panel);border-right:1px solid var(--border-color);z-index:10;flex-direction:column;width:260px;height:100vh;display:flex;position:fixed;top:0;bottom:0;left:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid var(--border-color);padding:24px}.sidebar-header h2{color:var(--text-primary);margin:0;font-size:1.25rem;font-weight:600}.tool-nav{flex-direction:column;gap:4px;padding:16px;display:flex}.nav-category{color:var(--text-secondary);letter-spacing:.05em;text-transform:uppercase;margin-top:16px;margin-bottom:8px;padding-left:12px;font-size:.75rem;font-weight:700}.nav-btn{text-align:left;border-radius:var(--radius-sm);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;padding:8px 12px;font-size:.9rem;font-weight:500}.nav-btn:hover{background:var(--bg-color)}.nav-btn.active{background:var(--primary-color);color:#fff}.main-content{flex-direction:column;gap:32px;min-height:100vh;margin-left:260px;padding:32px;display:flex}.tabs-container{-webkit-overflow-scrolling:touch;scrollbar-width:none;margin-bottom:8px;padding-bottom:8px;overflow-x:auto}.tabs-container::-webkit-scrollbar{display:none}.tabs{flex-direction:column;gap:4px;display:flex}.tab-divider{background-color:var(--border-color);width:100%;height:1px;margin:4px 0}.nav-btn.tab{cursor:pointer;color:var(--text-secondary);border-radius:var(--radius-md);transition:all var(--transition-fast);background:0 0;border:none;padding:8px 16px;font-size:.95rem;font-weight:500}.nav-btn.tab:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-btn.tab.active{background:var(--bg-color);color:var(--primary-color);border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.workspace-grid{grid-template-columns:1fr 1fr;align-items:start;gap:32px;display:grid}.panel-column{flex-direction:column;gap:24px;min-width:0;display:flex}.order-desktop-1{order:1}.order-desktop-2{order:2}.order-desktop-3{order:3}.preview-container{background-color:var(--bg-color);border-radius:var(--radius-md);border:1px solid var(--border-color);flex-direction:column;align-items:center;width:100%;height:500px;padding:16px;display:flex;position:relative;overflow:auto}#preview-canvas-container{flex-direction:column;align-items:center;gap:16px;width:100%;display:flex}.pdf-page-canvas{max-width:100%;box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}#selected-files-list{margin:0;padding:0;list-style:none}#selected-files-list li{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:8px 0;font-size:.85rem;display:flex}.file-name{white-space:nowrap;text-overflow:ellipsis;flex:1;overflow:hidden}.file-size{color:var(--text-secondary);margin-left:8px}@media (width<=900px){.pdftool-app{flex-direction:column;display:flex}.sidebar{border-right:none;border-bottom:1px solid var(--border-color);width:100%;height:auto;position:static}.sidebar-header{display:none}.tool-nav{padding:8px 16px}.tabs{-webkit-overflow-scrolling:touch;scrollbar-width:none;flex-direction:row;align-items:center;gap:8px;overflow-x:auto}.tabs::-webkit-scrollbar{display:none}.tab-divider{width:1px;height:20px;margin:0 4px}.nav-category{display:none}.nav-btn{white-space:nowrap}.main-content{gap:16px;margin-left:0;padding:16px 12px}.workspace-grid{grid-template-columns:1fr}.preview-container{height:350px}.order-mobile-1{order:1!important}.order-mobile-2{order:2!important}.order-mobile-3{order:3!important}}