:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{width:100vw;height:100vh;margin:0;display:flex;background:#f8f8f8;place-items:center}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe 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#dee2e6;min-height:100px;display:flex;flex-direction:column;justify-content:center}.file-input-wrapper{margin-bottom:1.5rem}input[type=file]{display:none}.file-input-label{display:flex;flex-direction:column;align-items:center;gap:.5rem;background:#fff;border:2px dashed #6c757d;border-radius:12px;padding:2rem;cursor:pointer;transition:all .3s ease;color:#495057;font-size:1.1rem;font-weight:500;min-height:120px;justify-content:center}.file-input-label:hover{background:#f8f9fa;border-color:#667eea;color:#667eea;transform:translateY(-2px)}.upload-icon{font-size:2rem;margin-bottom:.5rem}.file-name{font-size:.9rem;color:#28a745;font-weight:600;text-align:center;word-break:break-all}.button-group{display:flex;gap:1rem;justify-content:center;align-items:center;flex-wrap:wrap}button{border:none;padding:.75rem 1.5rem;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;display:inline-flex;align-items:center;gap:.5rem;justify-content:center;min-width:140px}.primary-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 15px #667eea66}.primary-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea99}.primary-button:disabled{background:#adb5bd;cursor:not-allowed;transform:none;box-shadow:none}.secondary-button{background:#fff;color:#6c757d;border:2px solid #dee2e6}.secondary-button:hover:not(:disabled){background:#f8f9fa;border-color:#6c757d;color:#495057;transform:translateY(-2px)}.download-button-small{background:linear-gradient(135deg,#28a745,#20c997);color:#fff;font-size:.9rem;padding:.5rem 1rem;min-width:auto;box-shadow:0 2px 8px #28a7454d}.download-button-small:hover{transform:translateY(-1px);box-shadow:0 4px 12px #28a74580}.status-section{min-height:40px;display:flex;align-items:center;justify-content:center}.loading-indicator{background:linear-gradient(135deg,#e3f2fd,#bbdefb);border:1px solid #2196f3;border-radius:8px;padding:1rem;text-align:center}.loading-indicator p{margin:0;color:#1976d2;font-weight:500}.error-message{background:linear-gradient(135deg,#ffebee,#ffcdd2);border:1px solid #f44336;color:#c62828;padding:1rem;border-radius:8px;font-weight:500;text-align:center}.preview-section{flex:1;display:flex;align-items:center;min-height:280px}.preview-container{width:100%;display:grid;grid-template-columns:1fr auto 1fr;gap:2rem;align-items:center;min-height:400px}.preview-column{display:flex;flex-direction:column;height:100%}.preview-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid #e9ecef}.preview-header h3{font-size:1.3rem;margin:0;color:#343a40;font-weight:700}.image-placeholder{flex:1;display:flex;align-items:center;justify-content:center;min-height:300px;border-radius:12px;background:#f8f9fa;border:2px solid #e9ecef}.image-container{background:#fff;border-radius:12px;padding:1rem;box-shadow:0 4px 20px #0000001a;max-width:100%;max-height:100%;display:flex;align-items:center;justify-content:center}.result-container{background:repeating-conic-gradient(#f8f9fa 0% 25%,#fff 0% 50%) 50% / 20px 20px}.preview-image{max-width:300px;max-height:300px;border-radius:8px;object-fit:contain;display:block}.placeholder-content{text-align:center;color:#6c757d;padding:2rem}.placeholder-icon{font-size:3rem;margin-bottom:1rem;opacity:.7}.placeholder-content p{margin:0;font-size:1rem;line-height:1.5}.arrow-container{display:flex;align-items:center;justify-content:center;width:60px}.arrow{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;box-shadow:0 4px 15px #667eea4d}.processing-indicator{display:flex;align-items:center;justify-content:center}.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top:2px solid white;border-radius:50%;animation:spin 1s linear infinite}.spinner-large{width:24px;height:24px;border:3px solid rgba(255,255,255,.3);border-top:3px solid white;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.footer-section{background:#f8f9fa;padding:1.5rem 2rem;text-align:center;border-top:1px solid #e9ecef}.footer-section p{margin:0;color:#6c757d}.footer-section small{font-size:.85rem}@media (max-width: 1024px){.preview-container{grid-template-columns:1fr;gap:1.5rem}.arrow-container{transform:rotate(90deg);margin:1rem 0}}@media (max-width: 768px){.app{padding:.5rem}.app-container{min-height:90vh}.header-section{padding:1.5rem}.brand h1{font-size:2.5rem}.main-content{padding:1.5rem;gap:1.5rem}.upload-section{padding:1.5rem;min-height:160px}.file-input-label{padding:1.5rem;min-height:100px}.button-group{flex-direction:column;gap:.75rem}.preview-image{max-width:250px;max-height:250px}.preview-header{flex-direction:column;gap:.5rem;align-items:flex-start}}@media (max-width: 480px){.app{padding:.25rem}.brand h1{font-size:2rem}.tagline{font-size:1rem}.main-content,.upload-section{padding:1rem}.preview-image{max-width:200px;max-height:200px}.footer-section{padding:1rem}}