.App{font-family:sans-serif;max-width:400px;margin:2rem auto;text-align:center}.input-row{margin-bottom:1rem}input{padding:.5rem;width:70%}button{padding:.5rem;margin-left:.5rem;cursor:pointer}ul{list-style:none;padding:0}li{display:flex;justify-content:space-between;align-items:center;margin:.5rem 0;padding:.5rem;border:1px solid #ddd}li span{flex-grow:1;cursor:pointer}li.completed span{text-decoration:line-through;color:gray}.delete-btn{background:none;border:none;font-size:1rem;cursor:pointer}