Topic: Simple userstyle and Firefox theme

I've put together some custom CSS that simplifies the look of the site, tightens up some margins, reduces text size, and saves some vertical space.

Updated for the redesign. Here's a screenshot of what it looks like: https://i.imgur.com/EuZrJZw.png

Just paste into the custom CSS section of the advanced user settings page, or use a browser plugin like Stylus

CSS
body {
    font-size: 80%;
}

div#page {
    margin: 0;
    padding: .25rem .5rem;
}

header {
    margin:0;
}

header#top h1 {
        position: absolute;
        font-size: 1.2em;
        margin: 0 1.35em;
}

header#top menu {
    margin-top: 0px;
    padding: 2px 1rem;
}

header#top menu.main {
    font-size: 106%;
    margin-left: 4em
}

.tag-list-header {
    font-size: .9em !important;
    margin-left: .1em;
    margin-top: .1em;
}

#tag-list > ul {
    margin-bottom: 0;
}

div#page aside#sidebar h1 {
    font-size: 1em;
}

.search-help {
    font-size: 0.8em;
}

#nav-links {
    border: none !important;
    padding: 4px !important;
    border-radius: initial;
}

#add-fav-button {
    box-shadow: none;
}

#remove-fav-button {
    box-shadow: none;
}

.bottom-notices > div {
    border: none;
}

#artist-commentary {
    border: none !important;
    box-shadow: none;
}

#comments {
    padding: .01em 1rem;
    box-shadow: none;
}

#search-box #tags {
    border-radius: 2px 0px 0px 2px;
    box-shadow: none;
}

#search-box button {
    box-shadow: none;
    padding: 1px 5px !important;
    border-radius: 0px 2px 2px 0px;
    background: #e7e7e7 !important
}

.wiki-link {
    margin-right: 0 !important;
}

.search-inc-tag {
   margin: 0px -1px;
}

.search-exl-tag {
    margin-right: 1px;
}

Optional smaller fav button:

.fav-buttons {
    font-size: 1em !important;
    margin-right: .7em !important;
}

Remove tag type headers:

.tag-list-header {
    display: none;
}

I've also made a quick Firefox Color theme to go with it: https://color.firefox.com/?theme=XQAAAAIUAQAAAAAAAABBqYhm849SCia2CaaEGccwS-xNKlhLliJ51ygIDSHb1doLaygW8Bddi9GoqshZlsLqwbpbODZCBui7Qg-sAra5UM5Vbf4flMlTTRMY4frhLzqzYV1JPal1SK8-J1jzGNCKwK9fKK8PtQ-8oNk2YxeRwQReQS7rvey4HClAHnV6R4GuuG0A4JvkCr522syakes_QSJKTceLDN7GOVuT3mf2YPWWQavRZnTOjE5RPhJ95xd2I0hVfN2H_-LaJAA

Updated