header.secret-society{
    background: url(../images/2023/Secret_room_of_an_old_society_of_mathematicians_scie.png) no-repeat, linear-gradient(#171716, #171716);
    background-size:auto;
    background-position: center center;
    padding-top: 150px;
    padding-left: 0px;
    min-height: 400px;
    text-align: center;
    color: white;
    font-family:Roboto, sans-serif;
    font-weight: 300;
}

header .tagline {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 25px;
    text-shadow:#222 1px 1px 1px;
}