body{
    margin: 0%;
    padding: 0%;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    background-color: #f0f0f0;
}
.container{
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(to right, #f0f0f0, #e0e0e0);
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: left;
}
.todo-app{
    width: 100%;
    max-width: 540px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    margin: 100px auto 20px;
    padding: 40px 30px 70px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.todo-app ul{
    text-align: center;
    width: 50px;
    margin: 0;
    padding: 0;
}
.list-container{
    align-items: left;
    text-align: left;
    justify-content: left;
}
.todo-app h1{
    font-size: 30px;
    color: #333;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.todo-app h1 img{
    width: 30px;
    margin-left: 10px;
    color: #007bff;
}
.row{
    width: 90%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 19px;
    padding-left: 20px;
    border-radius: 30px;
    background: #edeefe;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
input{
    flex: 1;
    border: none;
    padding: 10px;
    outline: none;
    background: transparent;
    font-size: 18px;

}
button{
    border: none;
    outline: none;
    padding: 15px 30px;
    background: #ff5945;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    border-radius: 15px;

}


ul li{
    font-size: 16px;
    padding: 12px 8px 12px 50px ;
    user-select:none;
    cursor: pointer;
    list-style: none;
    position: relative;
    text-align: center;

}
ul li::before{
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    border-radius: 30px;
    background-color: #90969c;
    background-image: url('https://img.icons8.com/ios-filled/50/ffffff/uncheckmark.png');
    background-size: cover;
    background-position: center;
    top: 12px;
    left: 8px;
}
ul li.checked{
    background-image: url('https://img.icons8.com/ios-filled/50/ffffff/checkmark.png');
    background-size: cover;
    background-position: center;
    text-decoration: line-through;
}
ul li.checked::before{
    background-image: url('https://img.icons8.com/ios-filled/50/ffffff/checkmark.png');
    background-size: cover;
    background-position: center;
    background-color: #ff5945;

}
ul li span{
    position: absolute;
    left: 0;
    top: 5px;
    width: 40px;
    height: 40px;
    font-size: 22px;
    color: #555;
    line-height: 40px;
    text-align: right;
    border-radius: 30px;
}
ul li span:hover{
    background: #edeefe;

}