body {
    font-family: Arial, sans-serif;
    text-align: center;
}

form {
    margin-bottom: 1rem;
}

input {
    padding: 0.5rem;
    font-size: 1rem;
}

button {
    padding: 0.5rem;
    font-size: 1rem;
}
.completed {
    text-decoration: line-through;
}
#todo-list, #todo-list ul {
    list-style-type: none;
    padding-left: 0;
}