todo.css

body {
    font-family: sans-serif;
    background-color: white;
}


.container {
    width: 50%;
    margin: auto;
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: start;
    padding: 0 20px;
    margin-top: 5%;
}

.container {
    background-color: whitesmoke;
}

h1 {
    text-align: center;
}

.input-div,
.item {
    /* height: 50px; */
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 10px 0;
    padding: 0 10px;
}

form {
    background-color: rgb(235, 235, 235);
    padding: 0 15px;
    border-radius: 10px;
}

.item {
    background-color: white;
    max-width: 100%;
}

.input-div {
    position: relative;
}

input {
    height: 25px;
    width: 70%;
    border: none;
    outline: none;
    border-radius: 10px;

}

.submitBtn {
    position: absolute;
    right: 0;
}

.itemTitle,
input {
    flex: 1;
}

#btn,
.deleteBtn {
    /* height: 25px; */
    border: none;
    outline: none;
    border-radius: 10px;
    background-color: rgb(28, 182, 182);
    color: white;
    padding: 8px 15px;
    cursor: pointer;

}

.deleteBtn {
    background-color: red;
    padding: 8px;
    margin-left: 5px;
}

.checkBtn {
    height: 5px;
    width: 5px;
    background-color: transparent;
    border: 3px solid black;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    position: relative;
}


.checkBtn.checked {
    border: 3px solid rgb(58, 247, 58);
}

.checkBtn.checked::before {
    content: '\2713';
    color: rgb(58, 247, 58);
    font-weight: bolder;
    font-size: 20px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}