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

.container{
    width:100%;
    min-height: 100vh;
    background:linear-gradient(125deg, #1b4eb3 , #71078c);
    padding: 10px;
}
.to-do-app{
    width:100%;
    max-width: 540px;
    background-color: white;
    margin: 100px auto 20px;
    padding:40px 30px 70px;
    border-radius: 10px;
}
.to-do-app h2 img{
    height: 50px;
    width: 50px;
    margin-left: 10px;;
}
.to-do-app h2{
    color:#002765;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}
.row{
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #edeef0;
    border-radius: 30px;
    padding-left: 20px;
    margin-bottom: 25px;
}
.row input{
   flex:1;
   border: none;
   background: transparent;
   outline: none;
   padding: 10px;
}
.row button{
    background-color: orange;
    color: white;
    border: none;
    outline: none;
    padding:16px 50px;
    font-size: 16px;
    border-radius: 25px;
    cursor: pointer;
}
ul li{
    list-style: none;
    font-size: 17px;
    padding:12px 8px 12px 50px;
    user-select: none;
    cursor: pointer;
    position: relative;
}
ul li::before{
    position: absolute;
    content: '';
    height: 28px;
    width: 28px;
    border-radius: 50px;
    background-image:url(unchecked1.png);
    background-size: cover;
    background-position: center;
    top:9px;
    left:8px;
}
ul li.checked{
    color: #555;
    text-decoration: line-through;
}
ul li.checked::before{
    background-image: url(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;
}