: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{max-width:1280px;margin:0 auto;padding:2rem;text-align:center}.app{background:linear-gradient(135deg,#7b2ff7,#068f11);color:#fff;padding:20px;max-width:400px;margin:auto;border-radius:12px;font-family:Arial,sans-serif}.header{text-align:center;font-weight:700;margin-bottom:15px}.todo-input{width:70%;padding:8px;border-radius:8px;border:none;margin-right:10px;font-size:16px}.add-btn{background-color:#ff6f91;color:#fff;border:none;padding:9px 15px;cursor:pointer;border-radius:8px;font-weight:700;transition:background-color .3s ease}.add-btn:hover{background-color:#ff4b69}.todo-list{list-style:none;padding:0;margin-top:20px}.todo{background:#fff;color:#333;padding:12px;margin-bottom:10px;border-radius:10px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:18px;box-shadow:0 4px 6px #0000001a;transition:background-color .3s ease}.todo.completed{background:#a3d2ca;text-decoration:line-through;color:#555}.delete-btn{background:#ff4b69;border:none;color:#fff;border-radius:8px;padding:4px 8px;cursor:pointer;font-weight:700;transition:background-color .3s ease}.delete-btn:hover{background:#ff1e3c}