style.css

*{
    margin: 0px;
    padding: 0px;
    font-family:sans-serif, "Poppins";
    box-sizing: border-box;

}


.containeer{
    width:100%;
    min-height: 100vh;
    background : linear-gradient(135deg, #153677, #4e085f);
    padding :10px;

}


.todo-list{
    width: 100%; 
    max-width: 540px;
    background: #fff;
    margin: 100px  auto 20px;
    padding:40px 30px 70px;
    border-radius:10px;

}
.todo-list img{
    width: 30px;
    margin-left: 10px;
}


.todo-list h2{
    color:#002765;
    display:flex;
    align-items: center;
    margin-bottom: 20px;
}
.row{
    display:flex;
    align-items: center;
    justify-content: space-evenly;
    background: #edeef0;
    border-radius: 30px;
    padding-left:20px;
    margin-bottom: 25px;
 

}

input{
    flex: 1;
    border: none;
    outline: none;
    background : transparent;
    padding:10px;
    font-weight: 14px;
}

.button{
    border:none;
    outline:none;
    padding:16px 50px;
    background:#ff5945;
    color:#fff;
    font-size:16px;
    cursor:pointer;
    border-radius:40px;

}

ul li{
    list-style: none;
    font-size:17px;
    padding:12px 8px 12px  50px;
    user-select:  none;
    cursor: pointer;
     position: relative;
}

ul li::before{
    content : '';
    position:absolute;
    height: 28px;
    width: 28px;
    border-radius:50%;
    background-image: url(images/unchecked.png);
    background-size: cover;
    background-position: center;
    top:12px;
    left:8px;;
}

ul li.checked{
color: #555;
text-decoration: line-through;
}

ul li.checked::before{
    background-image:url(images/checked.png);
    
}

ul li span{
    position:absolute;
    right:0;
    top :5px;
    width:40px;
    height: 40px;
    font-size: 22px;
    color: #555;
    line-height: 40px;
    text-align:center;
    border-radius: 50% ;
}


ul.li:hover{
background:#edeef0;

}