YouTube | Chat Properties by grindle

/* ==UserStyle==
@name           YT Chat Props
@namespace      https://github.com/Granshmeyr/userstyles
@version        1.0.2
@description    Adjust properties of YouTube livestream chat.
@author         Grindle
@preprocessor stylus
@var number      padding-horizontal         "Element Padding Horizontal (px):"    [7,   0, 128, 1]
@var number      padding-vertical           "Element Padding Vertical (px):"      [7,   0, 128, 1]
@var number      line-height                "Message Line Spacing (px):"          [14,  0, 128, 1]
@var number      message-font-size          "Message Font Size (px):"             [12,  0, 128, 1]
@var number      author-font-size           "User Name Size (px):"                [12,  0, 128, 1]
@var checkbox    author-hidden              "User Icons Hidden?"                  0
@var number      emoji-scale                "Emoji Scale (%):"                    [100, 0, 400, 1]
@var number      emoji-margin-horizontal    "Emoji Padding Horizontal (px):"      [2, 0, 128, 1]
==/UserStyle== */
@-moz-document url-prefix("https://www.youtube.com/live_chat") {
    yt-live-chat-text-message-renderer {
        padding: ((padding-vertical)px (padding-horizontal)px) !important;
    }

    #author-photo {
        if author-hidden==1 {
            display: none !important;
        }
        else {
            display: block !important;
        }
    }

    #author-name.member.yt-live-chat-author-chip {
        font-size: (author-font-size)px !important;
    }

    #author-name.yt-live-chat-author-chip {
        font-size: (author-font-size)px !important;
    }

    #message.yt-live-chat-text-message-renderer {
        font-size: (message-font-size)px !important;
        line-height: (line-height)px !important;
    }

    #message.yt-live-chat-text-message-renderer .emoji.yt-live-chat-text-message-renderer {
        scale: (emoji-scale)% !important;
        margin: 0px (emoji-margin-horizontal)px 0px !important;
    }
}