:root{--primary:#3498db;--primary-dark:#2980b9;--secondary:#2ecc71;--secondary-dark:#27ae60;--danger:#e74c3c;--warning:#f39c12;--light:#f8f9fa;--dark:#343a40;--gray:#6c757d;--border-radius:8px;--box-shadow:0 4px 6px rgba(0,0,0,0.1);--transition:all .3s ease}*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif}body{background-color:#f5f7fa;color:var(--dark);line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:20px}header{text-align:center;padding:40px 0;background:linear-gradient(135deg,var(--primary),var(--secondary));color:white;border-radius:var(--border-radius);margin-bottom:30px;box-shadow:var(--box-shadow)}h1{font-size:2.5rem;margin-bottom:10px}.subtitle{font-size:1.2rem;opacity:.9}.card{background:white;border-radius:var(--border-radius);box-shadow:var(--box-shadow);padding:30px;margin-bottom:30px;transition:var(--transition)}.card:hover{transform:translateY(-5px);box-shadow:0 10px 20px rgba(0,0,0,0.1)}.card-title{font-size:1.5rem;margin-bottom:20px;color:var(--primary);display:flex;align-items:center}.card-title i{margin-right:10px}.upload-area{border:2px dashed var(--gray);border-radius:var(--border-radius);padding:40px 20px;text-align:center;cursor:pointer;transition:var(--transition);margin-bottom:20px}.upload-area:hover{border-color:var(--primary);background-color:rgba(52,152,219,0.05)}.upload-area.active{border-color:var(--secondary);background-color:rgba(46,204,113,0.1)}.upload-icon{font-size:48px;color:var(--gray);margin-bottom:15px}.upload-text{font-size:1.1rem;margin-bottom:10px}.upload-hint{color:var(--gray);font-size:.9rem}.btn{display:inline-block;background-color:var(--primary);color:white;border:0;padding:12px 24px;border-radius:var(--border-radius);font-size:1rem;cursor:pointer;transition:var(--transition);text-decoration:none;text-align:center;font-weight:600}.btn:hover{background-color:var(--primary-dark);transform:translateY(-2px)}.btn-secondary{background-color:var(--secondary)}.btn-secondary:hover{background-color:var(--secondary-dark)}.btn-danger{background-color:var(--danger)}.btn-warning{background-color:var(--warning)}.btn:disabled{background-color:var(--gray);cursor:not-allowed;transform:none}.file-info{display:none;background-color:var(--light);padding:15px;border-radius:var(--border-radius);margin-bottom:20px}.file-info.active{display:block}.progress-container{display:none;margin:30px 0}.progress-container.active{display:block}.progress-bar{height:10px;background-color:#e9ecef;border-radius:5px;overflow:hidden;margin-bottom:10px}.progress{height:100%;background:linear-gradient(90deg,var(--secondary),var(--primary));width:0;transition:width .3s ease}.progress-text{text-align:center;font-size:.9rem;color:var(--gray)}.preview-container{display:none;margin:20px 0}.preview-container.active{display:block}.preview-title{font-size:1.2rem;margin-bottom:15px;color:var(--primary)}.preview-images{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:15px;max-height:400px;overflow-y:auto;padding:10px;border:1px solid #e9ecef;border-radius:var(--border-radius)}.preview-image{width:100%;height:200px;object-fit:cover;border-radius:var(--border-radius);box-shadow:var(--box-shadow);cursor:pointer;transition:var(--transition)}.preview-image:hover{transform:scale(1.05)}.quality-settings{display:none;margin:20px 0;padding:20px;background-color:var(--light);border-radius:var(--border-radius)}.quality-settings.active{display:block}.setting-group{margin-bottom:15px}.setting-label{display:block;margin-bottom:5px;font-weight:600}.setting-input{width:100%;padding:8px 12px;border:1px solid #ced4da;border-radius:var(--border-radius);font-size:1rem}.setting-range{width:100%}.range-value{display:inline-block;margin-left:10px;font-weight:600;color:var(--primary)}.result-container{display:none;text-align:center;padding:30px}.result-container.active{display:block}.result-icon{font-size:64px;color:var(--secondary);margin-bottom:20px}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:40px}.feature{text-align:center;padding:20px}.feature-icon{font-size:36px;color:var(--primary);margin-bottom:15px}.privacy-notice{background-color:#e8f4fd;border-left:4px solid var(--primary);padding:15px;margin:20px 0;border-radius:var(--border-radius)}footer{text-align:center;padding:30px 0;margin-top:50px;color:var(--gray);border-top:1px solid #dee2e6}.hidden{display:none}@media(max-width:768px){.container{padding:10px}h1{font-size:2rem}.card{padding:20px}.preview-images{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}}