: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}}:root{--bg: #121212;--text: #ffffff;--box: #1e1e1e;--button-bg: #1e90ff;--button-hover: #007acc;--highlight: #ffc107;--error-bg: #ffe0e0;--error-text: #b00020}[data-theme=light]{--bg: #ffffff;--text: #121212;--box: #f0f0f0;--button-bg: #007acc;--button-hover: #005999;--highlight: #ff5722;--error-bg: #ffeeee;--error-text: #d00000}body{background-color:var(--bg);color:var(--text);margin:0;font-family:Segoe UI,sans-serif;transition:all .3s ease}.app{max-width:800px;margin:40px auto;padding:20px;text-align:center}h1{font-size:2.5rem;margin-bottom:20px}textarea{width:100%;height:180px;font-size:16px;padding:12px;margin:16px 0;border:2px solid var(--text);border-radius:10px;background-color:var(--box);color:var(--text);resize:vertical}button{background-color:var(--button-bg);color:#fff;padding:12px 24px;font-size:16px;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease;margin-bottom:12px}button:hover:not(:disabled){background-color:var(--button-hover)}button:disabled{background-color:#555;cursor:not-allowed}.explanation-box{background-color:var(--box);padding:24px;margin-top:24px;border-radius:10px;text-align:left;box-shadow:0 0 15px #00ffff1a;border:1px solid #333;transition:all .3s ease}.explanation-box h3{color:var(--highlight);margin-bottom:10px}.explanation-box p{white-space:pre-line;line-height:1.6;color:var(--text)}.explanation-box.error{background-color:var(--error-bg);color:var(--error-text);border:2px solid var(--error-text)}.theme-toggle{position:absolute;top:20px;right:20px;background:none;border:2px solid var(--button-bg);border-radius:20px;padding:6px 14px;font-size:14px;cursor:pointer;color:var(--text);transition:all .3s ease}