: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:800px;margin:0 auto;padding:2rem;font-family:system-ui,sans-serif}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}nav button{margin-left:1rem;padding:.5rem 1rem;cursor:pointer}form{display:flex;flex-direction:column;gap:1rem;margin-bottom:2rem;padding:1.5rem;background:#f4f4f5;border-radius:8px}input{padding:.5rem;border:1px solid #ddd;border-radius:4px}button[type=submit]{padding:.5rem;background:#000;color:#fff;border:none;border-radius:4px;cursor:pointer}ul{list-style:none;padding:0}li{padding:1rem;border-bottom:1px solid #eee}.error{color:red;background:#ffe6e6;padding:1rem;border-radius:4px}