.pdf-to-png{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:1.5rem}.page-header{text-align:center;color:#fff;margin-bottom:1rem}.page-header h1{font-size:2.5rem;margin-bottom:.5rem;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.page-header p{font-size:1rem;opacity:.95}.upload-zone{background:#fff;border:3px dashed #ccc;border-radius:16px;padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease}.upload-zone:hover{border-color:#667eea;box-shadow:0 8px 20px #0000001a}.upload-zone:hover:not(:has(.btn-primary:hover)){transform:translateY(-2px)}.upload-zone .btn-primary{transition:all .2s ease}.upload-zone .btn-primary:hover{transform:none}.upload-zone.drag-over{border-color:#667eea;background:#f0f4ff}.upload-zone.has-file{border-style:solid;border-color:#4caf50;cursor:default}.upload-icon{font-size:4rem;margin-bottom:1rem}.upload-zone p{color:#666;margin-bottom:1.5rem;font-size:1.1rem}.file-info{display:flex;align-items:center;justify-content:center;gap:1rem;padding:1rem;background:#f9fafb;border-radius:8px}.file-icon{font-size:2rem}.file-name{flex:1;font-weight:600;color:#333;word-break:break-all}.btn-remove{background:#ff5252;color:#fff;border:none;width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:1.2rem;display:flex;align-items:center;justify-content:center;transition:all .2s}.btn-remove:hover{background:#d32f2f;transform:scale(1.1)}.btn{padding:.8rem 2rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.btn-primary{background:#667eea;color:#fff}.btn-primary:hover{background:#5568d3;transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.btn-convert{width:100%;padding:1rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:1.2rem;margin-top:1rem}.btn-convert:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.btn-convert:disabled{opacity:.6;cursor:not-allowed}.options{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 4px 12px #0000001a}.options h3{color:#333;margin-bottom:1.5rem;font-size:1.3rem}.option-group{margin-bottom:1.5rem}.option-group label{display:block;color:#555;margin-bottom:.5rem;font-weight:500}.option-group strong{color:#667eea;float:right}.option-group input[type=range]{width:100%;height:6px;border-radius:3px;background:#e0e0e0;outline:none;-webkit-appearance:none}.option-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:#667eea;cursor:pointer}.option-group input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#667eea;cursor:pointer;border:none}.option-group input[type=checkbox]{margin-right:.5rem;width:18px;height:18px;cursor:pointer}.page-range{display:flex;align-items:center;gap:1rem;margin-top:.5rem}.page-range input{flex:1;padding:.5rem;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem}.page-range span{color:#999;font-weight:700}.progress{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 4px 12px #0000001a}.progress p{color:#555;margin-bottom:1rem;text-align:center;font-weight:500}.progress-bar{width:100%;height:20px;background:#e0e0e0;border-radius:10px;overflow:hidden;margin-bottom:.5rem}.progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);transition:width .3s ease}.progress-text{text-align:center;color:#667eea;font-weight:600}@media(max-width:768px){.page-header h1{font-size:2rem}.upload-zone{padding:2rem 1rem}.upload-icon{font-size:3rem}.options,.progress{padding:1.5rem}}