.app{max-width:1200px;margin:0 auto;padding:20px}h1{text-align:center;color:#333;margin-bottom:30px}.container{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:20px}.input-section,.output-section{display:flex;flex-direction:column}h2{color:#555;margin-bottom:15px;font-size:1.2rem}.json-textarea{width:100%;height:300px;padding:15px;border:2px solid #ddd;border-radius:8px;font-family:Courier New,monospace;font-size:14px;resize:vertical;margin-bottom:15px}.json-textarea:focus{outline:none;border-color:#007bff}.process-btn{background-color:#007bff;color:#fff;border:none;padding:12px 24px;border-radius:6px;cursor:pointer;font-size:16px;transition:background-color .2s}.process-btn:hover{background-color:#0056b3}.json-output{background-color:#f8f9fa;border:2px solid #e9ecef;border-radius:8px;padding:15px;text-align:left;font-family:Courier New,monospace;font-size:14px;min-height:300px;white-space:pre-wrap;overflow-x:auto;margin:0 0 15px}.copy-btn{background-color:#28a745;color:#fff;border:none;padding:10px 20px;border-radius:6px;cursor:pointer;font-size:14px;transition:background-color .2s}.copy-btn:hover{background-color:#218838}.error{color:#dc3545;margin-top:10px;padding:10px;background-color:#f8d7da;border:1px solid #f5c6cb;border-radius:4px}.toast{position:fixed;top:20px;right:20px;background-color:#28a745;color:#fff;padding:12px 20px;border-radius:6px;box-shadow:0 2px 10px #0003;z-index:1000;animation:slideIn .3s ease-out}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@media (max-width: 768px){.container{grid-template-columns:1fr;gap:20px}.json-textarea,.json-output{height:250px}.toast{right:10px;left:10px;text-align:center}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:#333;background-color:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}*{box-sizing:border-box}body{margin:0;padding:20px;min-width:320px;min-height:100vh}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;width:100%}