#pdf-merger-app{width:100%;max-width:1200px;margin:0 auto;font-family:var(--font-family);}#files-preview-container{display:flex;flex-wrap:wrap;gap:1.5rem;margin-top:2rem;justify-content:center;}.pdf-preview-item{position:relative;width:160px;text-align:center;background:var(--card-bg);padding:1rem;border-radius:10px;border:1px solid var(--card-border);transition:transform 0.3s,box-shadow 0.3s;}.pdf-preview-item:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(0,0,0,0.2);}.pdf-preview-item canvas{width:100%;height:auto;border-radius:8px;margin-bottom:0.5rem;}.pdf-preview-item p{font-size:0.8rem;color:var(--text-color-light);word-break:break-all;height:40px;overflow:hidden;}.pdf-preview-item .remove-btn{position:absolute;top:-10px;right:-10px;background:var(--primary-color);color:white;border:2px solid var(--bg-color);border-radius:50%;width:28px;height:28px;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform 0.3s;}.pdf-preview-item .remove-btn:hover{transform:scale(1.1);}.options-bar{display:flex;justify-content:space-between;align-items:center;margin:2rem 0;padding:1rem 1.5rem;background-color:var(--card-bg);border-radius:10px;border:1px solid var(--card-border);}.page-mode-toggle{display:flex;align-items:center;gap:0.75rem;font-weight:500;}.switch{position:relative;display:inline-block;width:50px;height:28px;}.switch input{opacity:0;width:0;height:0;}.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--card-border);transition:.4s;background-image:none;}.slider:before{position:absolute;content:"";height:20px;width:20px;left:4px;bottom:4px;background-color:white;transition:.4s;}input:checked+.slider{background:var(--primary-gradient);height:27px;}input:checked+.slider:before{transform:translateX(22px);}.slider.round{border-radius:34px;height:27px;}.slider.round:before{border-radius:50%;}#page-selection-area{margin-top:1rem;}.pdf-page-container{margin-bottom:2rem;padding:1.5rem;background-color:var(--card-bg);border-radius:10px;border:1px solid var(--card-border);}.pdf-page-container h4{margin-bottom:1.5rem;font-size:1.1rem;color:var(--primary-color);}.pages-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:1.5rem;}.page-item{position:relative;text-align:center;cursor:pointer;transition:transform 0.3s;}.page-item:hover{transform:scale(1.05);}.page-item canvas{width:100%;height:auto;border:2px solid var(--card-border);border-radius:8px;transition:border-color 0.3s;}.page-item.selected canvas{border-color:var(--primary-color);box-shadow:0 0 15px rgba(255,77,141,0.3);}.page-item .page-number{font-size:0.8rem;margin-top:0.5rem;color:var(--text-color-light);}.page-item .selection-tick{position:absolute;top:8px;right:8px;width:24px;height:24px;background:var(--primary-gradient);color:white;border-radius:50%;border:2px solid var(--bg-color);display:none;align-items:center;justify-content:center;font-size:1.2rem;}.page-item.selected .selection-tick{display:flex;}.fixed-bottom-bar{position:sticky;bottom:0;left:0;width:100%;background-color:rgba(13,13,26,0.8);backdrop-filter:blur(10px);padding:1.5rem 0;text-align:center;box-shadow:0 -5px 20px rgba(0,0,0,0.2);z-index:1000;border-top:1px solid var(--card-border);}.sortable-ghost{opacity:0.4;background:rgba(255,255,255,0.1);border-radius:10px;}#selected-pages-preview-area{margin-top:2rem;padding:1.5rem;background-color:var(--card-bg);border-radius:10px;border:1px solid var(--card-border);}#selected-pages-preview-area h4{margin-bottom:1.5rem;font-size:1.1rem;color:var(--primary-color);}#selected-pages-container{display:flex;flex-wrap:wrap;gap:1rem;min-height:150px;border:2px dashed var(--card-border);border-radius:8px;padding:1rem;}.selected-page-item{position:relative;width:120px;text-align:center;cursor:grab;}.selected-page-item canvas{width:100%;height:auto;border-radius:8px;margin-bottom:0.5rem;}.selected-page-item .page-number{font-size:0.8rem;color:var(--text-color-light);}.selected-page-item .remove-selected-btn{position:absolute;top:-8px;right:-8px;background:var(--primary-color);color:white;border:2px solid var(--bg-color);border-radius:50%;width:24px;height:24px;font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform 0.3s;}.selected-page-item .remove-selected-btn:hover{transform:scale(1.1);}