*{
    margin: 0;
    padding: 0;
    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-color: white;
    margin: 100px auto 20px;
    padding: 40px 30px 70px;
    border-radius: 20px;
}
.todo-app h1{
    color: #002765;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 10px;
}
.row{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}
#input-box{
    width: 1005;
    padding: 10px 30px;
    overflow-x: scroll;
    flex: 1;
    border: none;
    outline: 0;
    background-color: #1e3e72;
    border-radius: 30px;
    font-size: x-large;
    color: aliceblue;
    
}
input::placeholder{
    color: white;
}
.row button{
    padding: 17px;
    border: none;
    border-radius: 50%;
    background-color: #183563;
    color: aliceblue;
    cursor: pointer;
}
ul li{
    margin-top: 10px;
    list-style: none;
    font-size: 22px;
    padding: 12px 8px 12px 50px;
    cursor: pointer; 
    user-select: none;
    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-position: center;
 top: 12px;
 left: 8px;
}
.checked{
    color: #002765;
    text-decoration: line-through;
}
.checked::before{
    background-image: url(./images/checked.png);
}
span{
    position: absolute;
    right: 0;
    top: 5px;
    width: 40px;
    height: 40px;
    font-size: 30px;
    line-height: 40px;
    text-align: center;
}
span:hover{
    background-color: #002765;
    color: aliceblue;
    border-radius: 50%;
}
.clear-btn{
    
    background-color: #002765;
    color: aliceblue;
    padding: 10px;
    border: none;
    outline: 0;
    border-radius: 5px;
}
.clear-btn:hover{
    background-color: wheat;
    color: #002765;
    transition: 1s;
}