: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-color: #f5f5f5;--content-bg: white;--text-color: #333;--input-bg: white;--input-border: #ccc;--button-bg: #007bff;--button-text: white;--progress-bg: #e0e0e0;--progress-fill: #007bff;--error-text: red}@media (prefers-color-scheme: dark){:root{--bg-color: #121212;--content-bg: #1e1e1e;--text-color: #ffffff;--input-bg: #2e2e2e;--input-border: #555;--button-bg: #2196f3;--button-text: white;--progress-bg: #444;--progress-fill: #2196f3;--error-text: #ff6b6b}}.container{display:flex;justify-content:center;align-items:center;height:100vh;width:100vw;background-color:var(--bg-color);transition:background-color .3s ease}.content{background:var(--content-bg);padding:30px;border-radius:12px;box-shadow:0 4px 10px #0000001a;text-align:center;width:350px;color:var(--text-color);transition:background-color .3s ease,color .3s ease}.input-group{display:flex;gap:10px;margin-top:15px}input{flex:1;padding:12px;border:1px solid var(--input-border);border-radius:6px;font-size:16px;background-color:var(--input-bg);color:var(--text-color);transition:background-color .3s ease,color .3s ease,border-color .3s ease}button{padding:12px;background-color:var(--button-bg);color:var(--button-text);border:none;border-radius:6px;cursor:pointer;font-size:16px;transition:background-color .3s ease,color .3s ease}button:disabled{background-color:#ccc;cursor:not-allowed}h2{font-size:24px;margin:15px 0}p{font-size:18px;color:var(--text-color)}.error{color:var(--error-text);font-size:14px;margin-top:10px}.progress-bar{width:100%;height:8px;background-color:var(--progress-bg);border-radius:5px;margin:10px 0;overflow:hidden;position:relative}.progress-fill{height:100%;background-color:var(--progress-fill);width:100%;transition:width 1s linear}