:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;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{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:#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}}.container{max-width:640px;margin:40px auto;padding:0 16px;text-align:left}h1{font-size:20px;margin-bottom:4px}.subtitle{color:#888;margin-top:0;margin-bottom:24px;font-size:14px}.upload-row{display:flex;align-items:center;gap:12px;margin-bottom:16px}.upload-btn{background:#1a73e8;color:#fff;border:none;padding:10px 18px;border-radius:6px;font-size:14px;cursor:pointer}.upload-btn:hover{background:#1558b0}.file-name{font-size:13px;color:#888}.error{color:#e0554f;font-size:13px;margin:8px 0}.preview{margin-top:16px}.preview img{max-width:100%;max-height:240px;border-radius:6px;border:1px solid #444}.result-block{margin-top:16px}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.result-header span{font-size:13px;font-weight:600}.copy-btn{background:#eee;color:#1a1a1a;border:1px solid #ccc;border-radius:4px;padding:4px 10px;font-size:12px;cursor:pointer}.copy-btn:hover{background:#ddd}textarea{width:100%;min-height:160px;box-sizing:border-box;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;padding:10px;border-radius:6px;resize:vertical}