body{margin:0;padding:0;font-family:Arial,sans-serif;background-color:#57ec9a}.todo-container{max-width:700px;margin:60px auto;border-radius:15px;justify-content:center;text-align:center;padding:20px;font-family:Arial,sans-serif;background-color:#21ce38}.todo-container h1{text-align:center;font-size:2em;margin-bottom:20px}.todo-input{padding:8px;width:70%;margin-right:10px;border-radius:4px;border:1px solid #ccc}.add-btn{padding:8px 12px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer}.todo-list{list-style:none;padding:0}.todo-item{display:flex;align-items:center;margin-bottom:5px}.todo-item input[type=checkbox]{margin-right:30px}