body {
    font-family: Comic Sans MS;
    margin: 0;
    font-size: 32px;
}
.header {   
    text-align: center;
    position: fixed;
    width: 100%;
    background: #fff;
    z-index: 1;
}
.content {
    margin: 0 15%;
    padding: 250px 0;
    z-index: 0;
}
.progress-container {
    height: 15px;
    width: 100%;
    background: #ccc;
}
.progress-bar {
    height: 15px;
    background: red;
    width: 0%;
}