Task3.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body
{
    height: 100vh;
    background-image: url('https://images.pexels.com/photos/2096622/pexels-photo-2096622.jpeg?auto=compress&cs=tinysrgb&w=1600');
   background-repeat:inherit;
}


.text1
{
    display:inline-block;
    font-size: 35px;
    text-align: center;
    font-family: 'Aleo';
    border: 1px solid rgb(255, 102, 0);
    margin-left:42%;
    padding: 23px;
    margin-top:12px;
    text-align: center;
    background-color:rgb(38, 255, 0);
    border-radius: 40%;
}
.container
{
    position: relative;
    max-width: 800px;
    padding: 10px;
    margin: 50px auto;
}
.addTask
{
    width: 100%;
    display: flex;
    padding: 10px 0;
}
.addTask > input[type="text"]
{
    width: 90%;
    color: rgb(211, 230, 49);

    border:none;
    border-bottom: 2px solid rgb(8, 136, 175);
    background: none;
    padding: 10px;
    font-size: 22px;
    outline: none;
}
.addTask button
{
    margin: 0 10px;
    background:rgb(134, 202, 244);
    color: black;
    font-size: 18px;
    text-transform: uppercase;
    padding: 10px;
    border: none;
    outline: none;
    border-radius: 50%; 
    cursor: pointer;
}
.notCompleted, .Completed
{
    margin: 5px 0;
    padding: 20px;
}
h3
{
    font-size: 28px;
    text-transform: uppercase;
    text-align: center;
    color: rgb(31, 23, 23);

}
ol
{
    list-style: none;
    counter-reset: my-counter;
}
ol li
{
    width: 100%;
    padding: 18px;
    margin: 5px 0;
    background: red;
    font-size: 22px;
    counter-increment: my-counter;
    border-radius: 20px;
}
ol.Completed li
{
    background: #00ff62;
}
ol li::before
{
    content: counter(my-counter);
    background: green;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: inline-block;
    line-height: 2rem;
    text-align: center;
    color: #fff;
    margin-right: 0.5rem;
}
li button
{
    float: right;
    padding: 5px;
    font-size: 28px;
    line-height: 28px;
    margin-right: 15px;
    background: none;
    border: none;
    outline: none;
    cursor: pointer;

}

::placeholder{

    color:yellow;

    opacity: 1;
}