My custom BeautifulDiscord StyleSheet

BeautifulDiscord.css

/*Channel Categories*/
.containerDefault-1bbItS{
	padding-top: 11px;
}
.nameCollapsed-3_ChMu, .nameDefault-Lnjrwm, .nameHovered-1YFSWq, .nameHoveredCollapsed-2c-EHI, .nameMuted-1n0LSj, .nameUnread-WKlSv-{
	text-transform: none;	
	font-size: 95%;
}

/*Completely hide blocked messages*/
.message-group-blocked{
	display:none;
}

/*Larger Avatars in Chat*/
div.avatar-large{	
	height: 50px;
	width: 50px;
	background-size: 100%;
	background-repeat: no-repeat;
}

/*Server Name*/
.name-3gtcmp{
	font-size: 18px;
}

/*New Messages*/
.theme-dark .friends-table .messages .divider.divider-red>span, .theme-dark .messages-wrapper .messages .divider.divider-red>span{
    color: #000000;
    background: red;
    border: 1px solid yellow;
}

/*Status Menue and Server Dropdown*/
.status-picker .popout-menu-item, .popout-menu .popout-menu-item {
	background-color: #1F2123;
}
.popout-menu .popout-menu-item:hover{
	background-color: black;
}
.popout-menu .popout-menu-separator{
	border-bottom: 1px solid #484D51;
}

/*Blue Mentions*/
.app.theme-dark .chat .content .messages-wrapper .messages .mentioned .message-text {
    background: rgba(53, 163, 216, 0.1);
	padding-bottom: 9px;
	padding-top: 1px;
}
.app.theme-dark .chat .content .messages-wrapper .messages .mentioned .message-text:after {
    background: rgba(53, 163, 216, 0.1);
    border-left: 4px solid #3487CE;
}

/*Double Column Servers*/
.guilds-wrapper{
	width: 125px;
}
.guilds-wrapper .scroller-wrap{
	width: 150px;
}
.guilds-wrapper .guilds {
    display: flex;
    flex-flow: row wrap;
    padding-left: 0;
    align-content: flex-start;
}

.guilds-wrapper .guilds .guild {
	margin-left: 8px;
    margin-top: 8px;
}

.guilds-wrapper .guilds .guild.unread::before {
	left: -2px;
    top: 5px;
    z-index:9000;
}

.guilds-wrapper .guilds .guild:first-child {
    position: relative; 
    left: 0;
    margin: auto;
    margin-top: 15px;
}

.guilds-wrapper .guilds .guild-separator {
	position: relative;
    width: 100%;
    margin-top: 10px;
}

.guilds-wrapper .guilds .friends-online {
	position: relative;
    width: 100%;
    margin: auto;
	margin-bottom: -20px;
    margin-top: 5px;
}

.guilds-wrapper .guilds .guild.selected:before {
    display: none;
}

.guilds-wrapper .guilds .guild {
	position: relative;
}

.guilds-wrapper .guilds .dms {
    width: 100%;
    display: flex;
    flex-flow: row wrap;
}

.guilds-wrapper .guilds .dms .guild {
    left: 0;
} 
.guilds-wrapper .guilds-add{
    position: absolute;        /* take element out of the normal page flow! */
	top: 10px;                /* position the element vertically using top or bottom
							and define width as you like:*/
	width: 50%;   	
	left: 0;                  /* set left and right to the same value! */
	right: 0;
	margin-left: auto;        /* adding auto-margins left and right will
                               center the element horizontally!*/
	margin-right: auto;
}