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

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

.todo-app {
    width: 100%;
    max-width: 540px;
    background: white;
    margin:100px auto 20px ;
    padding: 40px 30px 70px;
    border-radius: 10px;
}

.todo-app h2 {
    color: #002765;
    display: flex;
    align-items: center;
    margin-bottom: 20px;

}

.todo-app img {
    width:35px ;
    margin-left: 10px;
}

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

    input{
        flex: 1;
        border: none;
        outline: none;
        background:transparent ;
        padding: 10px;
    }

    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 span:hover{
        background:#edeef0 ;
    }