body{font-family:sans-serif;background:#f4f4f4;display:flex;justify-content:center;padding:2rem}.app{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 4px 12px #0000001a;width:400px}.add-todo{display:flex;gap:8px;margin-bottom:1rem}.add-todo input{flex:1;padding:6px}._todo_6az4x_1{color:#000;text-decoration:none}._completed_6az4x_6{color:gray;text-decoration:line-through}