.adm-icon { 
    background-image: url('https://www.flaticon.com/svg/static/icons/svg/2881/2881142.svg');
    background-size: 16px;
}
.mod-icon { 
    background-image: url('https://ru.tankiwiki.com/images/ru/f/f9/Avatar_moder_chat.png');
    background-size: 16px;
}
.chatFull .transparent:before {
    position: absolute;
    width: 100%;
    text-align: center;
    left:0;
    color: #00BFFF; /* цвет текста меняем на нужный */
    top: 90%; /* положение текста 0% - 90% сверху вниз */
    content:'Приветствуем вас.'; /* содержание текста */
    font-size: 20px; /* размер текста */
}
.chatMessage .user2829216{
background: url(Vincenzo)
	 url('https://www.flaticon.com/svg/static/icons/svg/811/811868.svg') no-repeat 19px 0;
    background-size:17px     
 

}

.user2829216::before { content: "[admin]"; color: purple; color: #red; font-size: 111%; padding: 3px; letter-spacing: 0px; color: red; backround: blue}
.chatMessage.chatMessageToMe:nth-last-child(7) {margin-left: 10px;}
.chatMessage.chatMessageToMe:nth-last-child(6) {margin-left: 15px;}
.chatMessage.chatMessageToMe:nth-last-child(5) {margin-left: 20px;}
.chatMessage.chatMessageToMe:nth-last-child(4) {margin-left: 25px;}
.chatMessage.chatMessageToMe:nth-last-child(3) {margin-left: 30px;}
.chatMessage.chatMessageToMe:nth-last-child(2) {margin-left: 35px;}
.chatMessage.chatMessageToMe:last-child        {margin-left: 40px;}