.slides
    {
        background-image: url('../images/old_map.png');
        background-color: rgba(255,255,255,0.1);
        background-blend-mode: lighten;
    }
    h1, h2, h3
    {
        /*color: rgb(133, 0, 65);*/
        color: rgb(25, 25, 25);
    }
    .next
    {
        color: black;
        background-color: #deb887;
        -webkit-box-shadow: 0 0 5pt black;
        box-shadow: 0 0 7pt black;
    }
    .next:hover
    {
        -webkit-box-shadow: 0 0 3pt black;
        box-shadow: 0 0 3pt black;
    }
    .next:focus
    {
        -webkit-box-shadow: 0 0 0pt black;
        box-shadow: 0 0 0pt black;
    }
    a
    {
        color: rgb(133, 0, 65);
    }
    a:hover, a:focus
    {
        color: black;
    }
    .copyright a
    {
        color: rgb(133, 0, 65);
    }
    .copyright a:hover
    {
        color: black;
    }
    hr
    {
        border-top: 1pt solid black;
    }
    .portrait-separator
    {
        border: 1px solid black;
    }
    .source
    {
        background-color: white;
    }
    .source .hljs-type, .source .hljs-keyword
    {
        color: blue;
    }
    .source .hljs-comment
    {
        color: #580762;
    }
    .source-long .hljs-comment
    {
        color: #580762 !important;
    }
    .hljs-string
    {
        color: green;
    }
    .hljs-literal
    {
        color: #800080;
    }
    @media screen and (orientation: portrait)
    {
        body
        {
             background-image: url('../images/old_map.png');
             background-color: rgba(255,255,255,0.1);
             background-blend-mode: lighten;
        }
        .slides
        {
            background-image: unset;
            background-color: unset;
            background-blend-mode: unset;
        }
    }
    /* Smaller Devices */
    @media screen and (min-width : 320px) and (max-width : 1200px) and (orientation : landscape)
    {
        body
        {
             background-image: url('../images/old_map.png');
             background-color: rgba(255,255,255,0.1);
             background-blend-mode: lighten;
        }
        .slides
        {
            background-image: unset;
            background-color: unset;
            background-blend-mode: unset;
        }
    }