todo.css

body {
    background-color: rgb(69, 2, 43);
    font-family: 'Poppins', sans-serif;
}
.container {
    width: 360px;
    padding: 33px;
    text-align: center;
    background-color: #fff;
    margin-left: 33%;
    margin-top: 5px;
}
input {
    width: 270px;
    padding: 8px;
    border: 2px solid rgb(56, 1, 13);
    outline: none;
    font-size: 19px;
}
button {
    width: 60px;
    height: 41px;
    background-color: rgb(79, 3, 35);
    color: white;
    border: none;
    cursor: pointer;
    outline: none;
    border-radius: 2px;
    font-size: 19px;
}
.text ul {
    display: flex;
    align-items: center;
    background-color: rgb(77, 4, 48);
    color: white;
    font-size: 19px;
    padding: 7px;
    margin: 5px 0;
    list-style-type: none;
}
.text ul span {
    flex-grow: 1;
}
.text ul input[type="checkbox"] {
    margin-left: 
}
.text ul i {
    cursor: pointer;
}
.text ul .edit-btn {
    margin-left: 10px;
}
.text ul .fa-trash {
    margin-left: 0; 
}
.text ul.completed {
    text-decoration: line-through;
    background-color: rgb(128, 128, 128);
}