.fixed-header {
    width: 100%;
    position: fixed;
    background: dodgerblue;
    padding: 10px 0;
    color: #fff;
    font-size: 16px;
}
.fixed-header{
    top: 0;
}
.container{
    width: 80%;
    margin: 0 auto; /* Center the DIV horizontally */
    font-size: 16px;
}