body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;padding:20px;background-color:#f5f5f5}.todo-container{max-width:600px;margin:0 auto;background-color:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 4px #0000001a}.todo-form{display:flex;gap:10px;margin-bottom:20px}.todo-input{flex:1;padding:8px;border:1px solid #ddd;border-radius:4px}.todo-button{padding:8px 16px;background-color:#06c;color:#fff;border:none;border-radius:4px;cursor:pointer}.todo-button:hover{background-color:#0052a3}.todo-list{list-style:none;padding:0}.todo-item{display:flex;align-items:center;gap:10px;padding:10px;border-bottom:1px solid #eee}.todo-item.completed{text-decoration:line-through;color:#888}.delete-button{padding:4px 8px;background-color:#dc3545;color:#fff;border:none;border-radius:4px;cursor:pointer}.delete-button:hover{background-color:#c82333}