.secret {}

body {
    background-image: url("/supporting/tiling_background_1019.png");
    font-family: sans-serif;
}

header, nav, main, footer, .external-section {
    max-width: 1024px;
    border: 1px solid yellow;
    border-radius: 10px;
    margin: auto auto 10px auto;
    background-color: white;
    padding: 10px;
}

a[href] {
    color: blue;
}

.anchor-link {
    color: inherit;
    text-decoration: inherit;
    font-size: smaller;
}

a:target {
    background-color: rgba(255, 255, 0, 0.3);
}

header {
    text-align: center;
}

nav {
    display: flex;
    justify-content: space-between;
}

.imageDiv {
    float: left;
}
.imageDiv > img {
    margin: auto 10px auto 10px;
    max-width: 240px;
}
.imageDiv > video {
    margin: auto 10px auto 10px;
}

nav ul {
    padding: 0;
    display: inline;
}

h1, h2, h3 {
    background-color: inherit;
}

@media (max-width: 768px) {
    nav {
        display: block;
        text-align: center;
    }
    
    .imageDiv {
        float: none;
        text-align: center;
    }
    
    ul {
        margin: 0;
        display: block;
    }
}