*{
    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: 540px;
    background: #fff;
    margin: 100px auto 20px;
    padding: 40px 30px 70px;
    border-radius: 10px;
 }
 .row{
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #edeef0;
    border-radius: 30px;
    padding-left: 20px;
    margin-bottom: 25px;
    
 }
 .filter-buttons {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}
.filter-btn {
    background: #edeef0;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
}
.filter-btn:hover {
    background: #ddd;
}
ul {
    list-style: none;
}
li {
    display: flex;
    align-items: center;
    padding: 10px;
    background: #edeef0;
    border-radius: 10px;
    margin-bottom: 10px;
}
li input[type="checkbox"] {
    margin-right: 10px;
}
li.checked {
    text-decoration: line-through;
    color: #888;
}
li span {
    margin-left: auto;
    cursor: pointer;
    font-size: 20px;
}