style.css

body{
    background-color: #e11010;
    height:100vh ;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container1{
    border-radius: 10px;
    background-color: rgb(53, 46, 77);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.container1 input{
    padding: 5px;
    border-radius: 5px;
    outline: none;
    border: none;
}
input:focus {
    outline: none;
    border: 2px rgb(50, 50, 222) solid;
}
.addbtn{
    padding: 5px;
    margin-left: 10px;
    color: white;
    background-color: rgb(43, 43, 230);
    border: none;
    border-radius: 10px;
}
.container1 button:hover{
    background-color: rgb(106, 106, 218);
}

ul{
    color: white;
    width: 100%;
    padding: 0px;

    /* display: flex; */
    
}
ul li{
    display: flex;
    justify-content: space-around;
    background-color: rgba(76, 84, 91, 0.199);
    list-style: none;
    padding: 7px;
    margin-top: 7px;
    border-radius: 8px;
    cursor: pointer;
}
ul button{
   background-color: rgb(157, 12, 22);
   border: none;
   color: white;
   padding: 4px;
   border-radius: 5px;
   padding-right: 8px;
   padding-left: 8px;
}

.completed{
    text-decoration: line-through;
    color: rgb(177, 180, 183);
}