.header, .footer {
    z-index: 100;
}

.content-outer {
    flex-basis: 80%;
    background-color: rgba(0, 0, 0, 0.7);

    -webkit-backdrop-filter: blur(100px);
    backdrop-filter: blur(100px);
    
    border-left: solid 1px rgba(255, 255, 255, 0.2);
    border-right: solid 1px rgba(255, 255, 255, 0.2);
    
    box-shadow: 0 0 40px rgba(0, 0, 0, 1.0);
}

#page-filter {
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    width: 100%;
    height: 100%;
}

#page-background {
    display: block;

    position: fixed;
    top: 0;
    left: 0;

    height: 100vh;
    width: 100vw;

    background-size: cover;
    background-position: center;
}