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


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

}
.todo-app{
    width:100%;
    max-width: width 540px;
    background:#fff;
    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 h2 img{
    width:30px;
    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-positon:center;
    top:12px;
    left:8px;

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

}
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;
    text-align:center;
}
ul li span:hover {
    background: #edeef0;
    border-radius: 50%;
    color: #ff5945;
    cursor: pointer;
}
/* JavaScript code removed. Place this script in a .js file, not in CSS. */