:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:#213547;background-color:#fff;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}#root{width:100%}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}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:#f9f9f9;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}:root{--primary-color: #007bff;--secondary-color: #6c757d;--background-color: #f8f9fa;--font-color: #333;--border-color: #dee2e6;--white: #fff;--light-gray: #f1f1f1}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--background-color);color:var(--font-color);margin:0;padding:20px}.container{max-width:900px;margin:0 auto;text-align:center}.header{margin-bottom:40px}.header h1{font-size:2.5rem;margin-bottom:10px}.header p{font-size:1.2rem;color:var(--secondary-color)}.main-content{display:flex;flex-direction:column;gap:20px}.drop-zone{border:2px dashed var(--border-color);border-radius:10px;padding:40px;cursor:pointer;transition:background-color .3s;background-color:var(--white)}.drop-zone:hover{background-color:var(--light-gray)}.upload-placeholder{display:flex;flex-direction:column;align-items:center;gap:10px}.upload-icon{color:var(--secondary-color)}.browse-button{background-color:var(--primary-color);color:var(--white);border:none;padding:10px 20px;border-radius:5px;cursor:pointer;font-size:1rem}.preview-section{background-color:var(--white);border-radius:10px;padding:20px;min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center}.preview-placeholder{color:var(--secondary-color);display:flex;flex-direction:column;align-items:center;gap:15px}.preview-container{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}.preview-image-container{position:relative}.preview-image{max-width:100px;max-height:100px;border-radius:5px}.cancel-button{position:absolute;top:-5px;right:-5px;background-color:#00000080;color:#fff;border:none;border-radius:50%;width:20px;height:20px;font-size:12px;line-height:20px;text-align:center;cursor:pointer}.merge-button{background-color:var(--secondary-color);color:var(--white);border:none;padding:10px 20px;border-radius:5px;cursor:pointer;font-size:1rem;width:100%;margin-top:auto}.merge-button:disabled{background-color:#ccc;cursor:not-allowed}.download-button{background-color:var(--primary-color);color:var(--white);border:none;padding:15px 30px;border-radius:5px;cursor:pointer;font-size:1.2rem;display:flex;align-items:center;gap:10px;margin-top:20px}