diff --git a/photogallery.py b/photogallery.py
index 73c302c..5f23e78 100644
--- a/photogallery.py
+++ b/photogallery.py
@@ -24,20 +24,47 @@ def imagegallery_argparse(args):
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
     <style>
+    :root
+    {
+        --color_bodybg: #272822;
+        --color_codebg: rgba(255, 255, 255, 0.05);
+        --color_codeborder: rgba(255, 255, 255, 0.2);
+        --color_h1bg: #284142;
+        --color_htmlbg: #1b1c18;
+        --color_blockquotebg: rgba(0, 0, 0, 0.2);
+        --color_blockquoteedge: rgba(255, 255, 255, 0.2);
+        --color_inlinecodebg: rgba(255, 255, 255, 0.1);
+        --color_link: #ae81ff;
+        --color_maintext: #ddd;
+    }
+
+    *, *:before, *:after
+    {
+        box-sizing: inherit;
+    }
+
     html
     {
-        background-color: black;
-        color: white;
-        font-family: sans-serif;
+        height: 100vh;
+        box-sizing: border-box;
+
+        background-color: var(--color_htmlbg);
+        color: var(--color_maintext);
+
+        font-family: Verdana, sans-serif;
+        font-size: 10pt;
+        margin: 0;
     }
-    body,
-    body h1
+
+    body
     {
-        text-align: center;
-    }
-    body *
-    {
-        text-align: initial;
+        min-height: 100%;
+        width: fit-content;
+        margin-left: auto;
+        margin-right: auto;
+        margin-top: 0;
+        margin-bottom: 0;
+        padding: 8px;
     }
     body.noscrollbar::-webkit-scrollbar
     {
@@ -47,40 +74,52 @@ def imagegallery_argparse(args):
     {
         scrollbar-width: none;
     }
+
     header
     {
-        text-align: end;
-    }
-    a
-    {
-        cursor: pointer;
-        color: #ae81ff;
-    }
-    p
-    {
+        width: 100%;
+        max-width: 120em;
         margin-left: auto;
         margin-right: auto;
-        width: 100%;
-        max-width: 1024px;
+        text-align: end;
     }
-    .photocell
+    header > *
+    {
+        display: inline-block;
+        padding: 16px;
+        background-color: var(--color_bodybg);
+    }
+
+    .album,
+    .photograph
     {
-        text-align: center;
-        display: block;
         position: relative;
         margin-left: auto;
         margin-right: auto;
-        margin-top: 8px;
-        margin-bottom: 8px;
-        max-width: 1024px;
+        margin-top: 8vh;
+        margin-bottom: 8vh;
     }
-    .photocell img
+
+    .photograph
     {
-        min-height: 100px;
-        min-width: 100px;
-        max-width: 100%;
+        padding: 2vh;
+        background-color: var(--color_bodybg);
+        border-radius: 16px;
     }
-    .photocell .download_link
+    article .photograph:first-of-type
+    {
+        margin-top: 0;
+    }
+    article .photograph:last-of-type
+    {
+        margin-bottom: 0;
+    }
+    .photograph img
+    {
+        max-height: 92vh;
+        border-radius: 8px;
+    }
+    .photograph .download_link
     {
         position: absolute;
         bottom: 8px;
@@ -95,14 +134,150 @@ def imagegallery_argparse(args):
         font-weight: bold;
         opacity: 80%;
     }
+    article .morelink
+    {
+        font-size: 2em;
+        text-align: center;
+        margin-top: 0;
+    }
+    @media not print
+    {
+        .photograph
+        {
+            box-shadow: #000 0px 0px 40px -10px;
+        }
+    }
+
+    @media screen and (min-width: 600px)
+    {
+        article
+        {
+            width: fit-content;
+        }
+    }
+
+    @media screen and (max-width: 600px)
+    {
+        .photograph
+        {
+            box-shadow: none;
+        }
+    }
+
     @media not all and (pointer: fine)
     {
+        #keyboardhint,
         #scrollbartoggle
         {
             display: none;
         }
     }
 
+    h1, h2, h3, h4, h5
+    {
+        margin-bottom: 0;
+    }
+    h1:first-child, h2:first-child, h3:first-child, h4:first-child, h5:first-child
+    {
+        margin-top: 0;
+    }
+    h2, h3, h4, h5
+    {
+        border-bottom: 1px solid var(--color_maintext);
+        /*background-color: var(--color_h1bg);*/
+    }
+    p:last-child
+    {
+        margin-bottom: 0;
+    }
+    h1 {font-size: 2.00em;} h1 * {font-size: inherit;}
+    h2 {font-size: 1.75em;} h2 * {font-size: inherit;}
+    h3 {font-size: 1.50em;} h3 * {font-size: inherit;}
+    h4 {font-size: 1.25em;} h4 * {font-size: inherit;}
+    h5 {font-size: 1.00em;} h5 * {font-size: inherit;}
+
+    .header_anchor_link {display: none; font-size: 1.0em; text-decoration: none}
+    h1:hover > .header_anchor_link {display: initial;}
+    h2:hover > .header_anchor_link {display: initial;}
+    h3:hover > .header_anchor_link {display: initial;}
+    h4:hover > .header_anchor_link {display: initial;}
+    h5:hover > .header_anchor_link {display: initial;}
+
+    a
+    {
+        color: var(--color_link);
+        cursor: pointer;
+    }
+
+    article *
+    {
+        max-width: 100%;
+        word-wrap: break-word;
+    }
+
+    #table_of_contents
+    {
+        border: 1px solid var(--color_blockquoteedge);
+        padding-top: 8px;
+        padding-bottom: 8px;
+        border-radius: 8px;
+    }
+
+    blockquote
+    {
+        background-color: var(--color_blockquotebg);
+        margin-inline-start: 0;
+        margin-inline-end: 0;
+        border-left: 4px solid var(--color_blockquoteedge);
+
+        padding: 8px;
+        padding-inline-start: 20px;
+        padding-inline-end: 20px;
+    }
+
+    table
+    {
+        border-collapse: collapse;
+        font-size: 1em;
+    }
+    table, table th, table td
+    {
+        border: 1px solid var(--color_maintext);
+    }
+    table th, table td
+    {
+        padding: 4px;
+    }
+
+    ol ol, ul ul, ol ul, ul ol
+    {
+        padding-inline-start: 20px;
+    }
+
+    *:not(pre) > code
+    {
+        background-color: var(--color_inlinecodebg);
+        border-radius: 4px;
+        line-height: 1.5;
+        padding-left: 4px;
+        padding-right: 4px;
+    }
+
+    pre
+    {
+        padding: 8px;
+        border: 1px solid var(--color_codeborder);
+        background-color: var(--color_codebg);
+        overflow-x: auto;
+    }
+
+    code,
+    pre,
+    .highlight *
+    {
+        font-family: monospace;
+    }
+
     </style>
     </head>
     <body>
@@ -116,14 +291,16 @@ def imagegallery_argparse(args):
         <p>Click each photo to view its full resolution. Click the number to download it.</p>
 
         {% for file in files %}
-        <div class="photocell">
+        <article class="photograph">
             <a target="_blank" href="{{urlroot}}{{file.relative_to('.', simple=True)}}"><img loading="lazy" src="{{urlroot}}thumbs/small_{{file.relative_to('.', simple=True)}}"/></a>
             <a class="download_link" download="{{file.basename}}" href="{{urlroot}}{{file.relative_to('.', simple=True)}}">#{{loop.index}}/{{files|length}}</a>
-        </div>
+        </article>
         {% endfor %}
     </body>
 
     <script type="text/javascript">
+    let desired_scroll_position = null;
+
     function toggle_scrollbar()
     {
         if (document.body.classList.contains("noscrollbar"))
@@ -150,6 +327,84 @@ def imagegallery_argparse(args):
         }
     }
 
+    function get_center_img()
+    {
+        let center_x = window.innerWidth / 2;
+        let center_y = window.innerHeight / 2;
+        while (true)
+        {
+            const element = document.elementFromPoint(center_x, center_y);
+            console.log(element);
+            if (element.tagName === "IMG")
+            {
+                return element;
+            }
+            center_y -= 20;
+            if (center_y <= 0)
+            {
+                return null;
+            }
+        }
+    }
+    function next_img(img)
+    {
+        const images = Array.from(document.images);
+        const this_index = images.indexOf(img);
+        if (this_index === images.length-1)
+        {
+            return img;
+        }
+        return images[this_index + 1];
+    }
+    function previous_img(img)
+    {
+        const images = Array.from(document.images);
+        const this_index = images.indexOf(img);
+        if (this_index === 0)
+        {
+            return img;
+        }
+        return images[this_index - 1];
+    }
+    function scroll_step()
+    {
+        const distance = desired_scroll_position - document.body.scrollTop;
+        const jump = (distance * 0.25) + (document.body.scrollTop < desired_scroll_position ? 1 : -1);
+        document.body.scrollTop = document.body.scrollTop + jump;
+        console.log(`${document.body.scrollTop} ${desired_scroll_position}`);
+        const new_distance = desired_scroll_position - document.body.scrollTop;
+        if (Math.abs(new_distance / distance) < 0.97)
+        {
+            window.requestAnimationFrame(scroll_step);
+        }
+    }
+    function scroll_to_img(img)
+    {
+        const img_centerline = img.offsetParent.offsetTop + img.offsetTop + (img.offsetHeight / 2);
+        // document.body.scrollTop = img_centerline - (window.innerHeight / 2);
+        desired_scroll_position = Math.round(img_centerline - (window.innerHeight / 2));
+        scroll_step();
+    }
+    function scroll_to_next_img()
+    {
+        scroll_to_img(next_img(get_center_img()));
+    }
+    function scroll_to_previous_img()
+    {
+        scroll_to_img(previous_img(get_center_img()));
+    }
+    function arrowkey_listener(event)
+    {
+        if (event.keyCode === 37)
+        {
+            scroll_to_previous_img();
+        }
+        else if (event.keyCode === 39)
+        {
+            scroll_to_next_img();
+        }
+    }
+
     let hide_cursor_timeout = null;
     function hide_cursor()
     {
@@ -167,6 +422,7 @@ def imagegallery_argparse(args):
     }
     function on_pageload()
     {
+        document.documentElement.addEventListener("keydown", arrowkey_listener);
         document.documentElement.addEventListener("mousemove", mousemove_handler);
         mousemove_handler();
         load_scrollbar_setting();