.header {
    background-color: rgb(192, 200, 200);
    padding: 30px 40px;
    color: rgb(102, 24, 24);
    text-align: center;
    font-size: x-large;
    }
.header:after {
    content: "";
    display: table;
    clear: both;
    }
.addBtn {
    padding: 10px;
    width: 90px;
    height: 40px;
    background: #700808;
    color: rgb(254, 254, 254);
    float: left;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 10px;
    margin-left: 1%;
    }
    .addBtn:hover {
        background-color: rgb(99, 96, 96);
        }
    input {
    margin: 0;
    border: none;
    padding: 10px;
    float: left;
    font-size: 16px;
    width: 500px;
    height: 20px;
    border-radius: 10px;
    margin-left: 25%;
    }
    [type=text],[type=button]
    {
        font-family:'Century Gothic';
        font-size:x-large;
        
    }
    .checked{
        background: #888;
        color: #fff;
        text-decoration: line-through;
    }
    
    tr {
        cursor: pointer;
        position: relative;
        padding: 16px 8px 12px 40px;
        background: #eee;
        font-size: 33px;
        transition: 0.2s;
        }
    tr:nth-child(odd) {
        background: #e6caca;
    }
    tr:hover {
        background: #ddd;
    }
    table {
        width: 700px;
        margin-left: 22%;
    }