:root{--primary-color:#3498db;--secondary-color:#2ecc71;--background-color:#f8f9fa;--text-color:#333;--border-color:#ddd}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:2rem}.card{background-color:#fff;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.1);padding:2rem;margin-bottom:2rem}.btn{display:inline-block;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;padding:.75rem 1.5rem;font-size:1rem;cursor:pointer;transition:background-color .3s ease}.btn:hover{background-color:#2980b9}.btn-secondary{background-color:var(--secondary-color)}.btn-secondary:hover{background-color:#27ae60}.btn:disabled{opacity:.7;cursor:not-allowed}.preparing-text{color:#666;font-size:.9rem;margin-top:.5rem;text-align:center}.image-container{display:flex;flex-wrap:wrap;gap:1rem;margin:1.5rem 0}.image-preview{position:relative;max-width:200px;border:1px solid var(--border-color);border-radius:4px;overflow:hidden}.image-preview img{width:100%;height:auto;display:block}.image-controls{position:absolute;top:5px;right:5px;display:flex;gap:4px}.btn-small{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;background-color:hsla(0,0%,100%,.8);border:none;cursor:pointer;font-size:14px;padding:0}.btn-small:hover{background-color:#fff}.btn-small:disabled{opacity:.5;cursor:not-allowed}.btn-danger{color:#e74c3c}.btn-danger:hover{background-color:#e74c3c;color:#fff}.image-name{display:block;font-size:.8rem;padding:4px;text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.actions{margin-top:1rem;display:flex;justify-content:flex-end}.dropzone{border:2px dashed var(--border-color);border-radius:4px;padding:2rem;text-align:center;cursor:pointer;transition:border-color .3s ease}.dropzone.active,.dropzone:hover{border-color:var(--primary-color)}.form-group{margin-bottom:1.5rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500}.form-control{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:4px;font-size:1rem}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem}.header h1{color:var(--primary-color)}.navigation{display:flex;gap:1.5rem}.nav-link{color:var(--text-color);text-decoration:none;font-weight:500;transition:color .3s;cursor:pointer}.nav-link:hover{color:var(--primary-color)}.footer{text-align:center;margin-top:2rem;padding:1rem 0;border-top:1px solid var(--border-color)}.footer-links{margin-top:.5rem}.footer-link{color:var(--primary-color);cursor:pointer;text-decoration:none;transition:color .3s}.footer-link:hover{text-decoration:underline}.footer-link-separator{margin:0 .5rem;color:var(--border-color)}@media (max-width:768px){.container{padding:1rem}.image-preview{max-width:150px}}.file-info{text-align:center}.progress-container{margin:1.5rem 0}.progress-bar{width:100%;height:10px;background-color:var(--border-color);border-radius:5px;overflow:hidden;margin-bottom:.5rem}.progress-fill{height:100%;background-color:var(--primary-color);transition:width .3s ease}.compression-stats{display:flex;justify-content:space-around;margin:1.5rem 0;flex-wrap:wrap;gap:1rem}.stat{display:flex;flex-direction:column;align-items:center;min-width:100px}.stat span{font-size:.9rem;color:#666;margin-bottom:.5rem}.stat strong{font-size:1.2rem;color:var(--text-color)}.action-buttons{display:flex;justify-content:center;gap:1rem;margin-top:1.5rem;flex-wrap:wrap}.range-labels{display:flex;justify-content:space-between;font-size:.8rem;color:#666;margin-top:.25rem}.result-container{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--border-color);text-align:center}.small{font-size:.8rem;color:#666;margin-top:.5rem}.pdf-list{margin-top:1.5rem;border-top:1px solid var(--border-color);padding-top:1.5rem}.file-list{list-style:none;padding:0;margin:1rem 0}.file-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem;border:1px solid var(--border-color);border-radius:4px;margin-bottom:.5rem;background-color:#f9f9f9}.file-item:hover{background-color:#f0f0f0}.file-info{gap:.75rem;width:100%;text-align:left}.file-info,.file-number{display:flex;align-items:center}.file-number{background-color:var(--primary-color);color:#fff;width:24px;height:24px;border-radius:50%;justify-content:center;font-size:.8rem;flex-shrink:0}.file-name{flex-grow:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-size{color:#666;font-size:.85rem;flex-shrink:0}.file-actions{display:flex;gap:.5rem}.total-size{text-align:right;margin:1rem 0;font-size:.9rem;color:#666}.error-message{background-color:#ffe5e5;border:1px solid #f99;border-radius:4px;padding:.75rem;margin:1rem 0;color:#d32f2f;text-align:center}.pdf-split-container{width:100%;margin-top:1.5rem}.file-info-container{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.preview-container{margin:1.5rem 0}.page-previews{display:flex;gap:1rem;overflow-x:auto;padding:1rem 0}.page-preview{position:relative;min-width:120px;max-width:120px;border:1px solid var(--border-color);border-radius:4px;overflow:hidden}.page-preview img{width:100%;height:auto;display:block}.page-number{position:absolute;bottom:0;left:0;right:0;background-color:rgba(0,0,0,.7);color:#fff;font-size:.8rem;padding:2px 4px;text-align:center}.more-pages{display:flex;align-items:center;justify-content:center;min-width:120px;height:160px;background-color:#f5f5f5;border:1px solid var(--border-color);color:#666;text-align:center;padding:0 1rem}.more-pages,.page-range-help{border-radius:4px;font-size:.9rem}.page-range-help{margin-top:.5rem;background-color:#f9f9f9;padding:.75rem}.page-range-help h4{margin-bottom:.5rem;color:#555}.page-range-help ul{list-style-type:none;padding-left:.5rem}.page-range-help li{margin-bottom:.25rem}