body{
font-family:Arial;
background:linear-gradient(to right,#4facfe,#00f2fe);
display:flex;
justify-content:center;
align-items:center;
height:100vh;
}

.container{
background:white;
padding:30px;
border-radius:15px;
width:400px;
}

.input-section{
display:flex;
gap:10px;
}

input{
flex:1;
padding:10px;
}

button{
padding:10px;
border:none;
background:#007bff;
color:white;
cursor:pointer;
border-radius:5px;
}

.filters{
margin:20px 0;
display:flex;
justify-content:space-between;
}

li{
background:#f4f4f4;
padding:10px;
margin-top:10px;
display:flex;
justify-content:space-between;
border-radius:5px;
}

.completed{
text-decoration:line-through;
opacity:0.6;
}