add descriptions and modify css

mattermost.md

@@ -6,37 +6,37 @@ description: "A list of communities and a NixNet-styled theme for Mattermost"
 cover: /assets/pages/mattermost.png 
 ---
 ## Communities
-- [NixNet](https://matter.nixnet.xyz/signup_user_complete/?id=n5qbfgiuaidmtmppetgj45zxuh)
-- [LenoirLUG](https://matter.nixnet.xyz/signup_user_complete/?id=rrko34wdzjfo5ykc49d1kkikeo)
-- [Linux Audio](https://matter.nixnet.xyz/signup_user_complete/?id=5ob84if1w3bx3n5phhsbjm3ohh)
+- [NixNet](https://matter.nixnet.xyz/signup_user_complete/?id=n5qbfgiuaidmtmppetgj45zxuh) - General chat, randomness, shiptosting, getting support, etc.
+- [Linux Audio](https://matter.nixnet.xyz/signup_user_complete/?id=5ob84if1w3bx3n5phhsbjm3ohh) - Open to anyone with an interest in audio recording, production, etc. on Linux
+- [LenoirLUG](https://matter.nixnet.xyz/signup_user_complete/?id=rrko34wdzjfo5ykc49d1kkikeo) - A chat room for the Lenoir Linux User Group
 
 ## Theme
 I've created a theme for Mattermost that uses the same colour scheme as the NixNet website. Copy and paste the code below into the application's theme settings under `Account Settings > Display > Theme > Custom Theme`.
 ```css
 {
-   "sidebarBg":"#242424",
-   "sidebarText":"#ffffff",
-   "sidebarUnreadText":"#ffffff",
-   "sidebarTextHoverBg":"#525252",
-   "sidebarTextActiveBorder":"#2b6863",
-   "sidebarTextActiveColor":"#ffffff",
-   "sidebarHeaderBg":"#242424",
-   "sidebarHeaderTextColor":"#ffffff",
-   "onlineIndicator":"#2b6863",
-   "awayIndicator":"#68652b",
-   "dndIndicator":"#682b2b",
-   "mentionBj":"#573c3c",
-   "mentionColor":"#ffffff",
-   "centerChannelBg":"#333333",
-   "centerChannelColor":"#ffffff",
-   "newMessageSeparator":"#2b6863",
-   "linkColor":"#5a76c7",
-   "buttonBg":"#5a76c7",
-   "buttonColor":"#ffffff",
-   "errorTextColor":"#654040",
-   "mentionHighlightBg":"#426350",
-   "mentionHighlightLink":"#2b6863",
-   "codeTheme":"monokai",
-   "mentionBg":"#573c3c"
-}
+  "sidebarBg":"#242424",
+  "sidebarText":"#ffffff",
+  "sidebarUnreadText":"#ffffff",
+  "sidebarTextHoverBg":"#525252",
+  "sidebarTextActiveBorder":"#2b6863",
+  "sidebarTextActiveColor":"#ffffff",
+  "sidebarHeaderBg":"#242424",
+  "sidebarHeaderTextColor":"#ffffff",
+  "onlineIndicator":"#2b6863",
+  "awayIndicator":"#68652b",
+  "dndIndicator":"#682b2b",
+  "mentionBj":"#573c3c",
+  "mentionColor":"#ffffff",
+  "centerChannelBg":"#333333",
+  "centerChannelColor":"#ffffff",
+  "newMessageSeparator":"#2b6863",
+  "linkColor":"#5a76c7",
+  "buttonBg":"#5a76c7",
+  "buttonColor":"#ffffff",
+  "errorTextColor":"#654040",
+  "mentionHighlightBg":"#949494",
+  "mentionHighlightLink":"#66aaa5",
+  "codeTheme":"monokai",
+  "mentionBg":"#573c3c"
+}```
 ```