index.css

 body{
	 max-height: 100vh !important;
 }
 
 main_container{
	 max-height: 100vh !important;
 }
 
 div.container {
	margin: 0px;
	padding: 0px;
	width: 100%;
 }
 div.chat_container {
	 display: flex;
	 justify-content: center;
	 background-color: rgb(245, 245, 245);
	 min-height: 100vh;
 }
 
 #custom-search-input {
 	background: #fff none repeat scroll 0 0;
 	margin: 0;
 	padding: 7px;
	border: none;
	position: relative;
	filter: blur(0px);
	-webkit-filter: blur(0px);
	-moz-filter: blur(0px);
	-ms-filter: blur(0px);
	-o-filter: blur(0px);
 }

 #custom-search-input::before {
	content: '';
  position: absolute;
  z-index: -1;
  height: 100%;
	width: 100%;
	overflow: hidden;
  top: 0px; right: 0px; left: 0px; bottom: 0px;
	filter: blur(15px);
	-webkit-filter: blur(20px);
	-moz-filter: blur(15px);
	-ms-filter: blur(15px);
	-o-filter: blur(15px);
 }

 ::-webkit-scrollbar {
    width: 8px;
}
 
::-webkit-scrollbar-thumb {
    border-radius: 10px;
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.5); 		
}

input.search-query.form-control {
	box-shadow: none;
	border-radius: 0px;
	border-color: rgba(0, 0, 0, 0);
	
}

input.search-query.form-control:focus {
	box-shadow: none;
	border-radius: 0px;
	border-color: #dddddd;
}

/*div.input-group.col-md-12 {
	width: 30%;
  -webkit-transition: width .35s ease-in-out;
	-moz-transition: width .35s ease-in-out;
  transition: width .35s ease-in-out;
}

div.input-group.col-md-12:active {
	width: 100%;
}*/

ul.dropdown-menu.dropdown-menu-left li.divider{
	margin-bottom: 0px;
}

 #custom-search-input .search-query {
 	background: #fff none repeat scroll 0 0 !important;
 	border-radius: none;
 	height: 33px;
 	margin-bottom: 0;
 	padding-left: 7px;
 	padding-right: 7px;
 }

 #custom-search-input button {
 	background: rgba(0, 0, 0, 0) none repeat scroll 0 0;
 	border: 0 none;
 	border-radius: 3px;
 	color: #666666;
 	left: auto;
 	margin-bottom: 0;
 	margin-top: 7px;
 	padding: 2px 5px;
 	position: absolute;
 	right: 0;
 	z-index: 9999;
 }

 .search-query:focus+button {
 	z-index: 3;
 }

 .all_conversation button {
 	background: #f5f3f3 none repeat scroll 0 0;
 	border: 1px solid #dddddd;
 	height: 38px;
 	text-align: left;
 	width: 100%;
 }

 .all_conversation i {
 	background: #e9e7e8 none repeat scroll 0 0;
 	border-radius: 100px;
 	color: #636363;
 	font-size: 17px;
 	height: 30px;
 	line-height: 30px;
 	text-align: center;
 	width: 30px;
 }

 .all_conversation .caret {
 	bottom: 0;
 	margin: auto;
 	position: absolute;
 	right: 15px;
 	top: 0;
 }

 .all_conversation .dropdown-menu {
 	background: #f5f3f3 none repeat scroll 0 0;
 	border-radius: 0;
 	margin-top: 0;
 	padding: 0;
 	width: 100%;
 }

 .all_conversation ul li {
 	border-bottom: 1px solid #dddddd;
 	line-height: normal;
 	width: 100%;
 }

 .all_conversation ul li a:hover {
 	background: #dddddd none repeat scroll 0 0;
 	color: #333;
 }

 .all_conversation ul li a {
 	color: #333;
 	line-height: 30px;
 	padding: 3px 20px;
 }

 li.conversations a {
	color: #333;
 	line-height: 30px;
 	padding: 3px 20px;
 }

 li.conversations {
	border-bottom: 1px solid #dddddd;
 	line-height: normal;
 }

 li.conversations:hover {
	background: #dddddd none repeat scroll 0 0;
 	color: #fff;
 	cursor: pointer;
 }

li.conversations:last-child {
	border-bottom: none; 
}

div.header_sec {
	display: inline-block;
}

div.header_sec .primary-font{
	padding: 0px 10px;
}

div.contact_sec {
	position: absolute;
	display: inline-block;
	right: 5px;
}

div.chat-body.clearfix {
	padding: 10px 0px;
}

 /*.member_list .chat-body {
 	margin-left: 47px;
 	margin-top: 0;
 }*/

 .top_nav {
 	overflow: visible;
 }

/* .member_list .contact_sec {
 	margin-top: 3px;
 }

 .member_list li {
 	padding: 6px;
 }

 .member_list ul {
 	border: 1px solid #dddddd;
 }*/

 .chat-img img {
 	height: 34px;
 	width: 34px;
 }

 /*.member_list li {
 	border-bottom: 1px solid #dddddd;
 	padding: 6px;
 }

 .member_list li:last-child {
 	border-bottom: none;
 }

 .member_list {
 	height: 60vh auto;
 	overflow-x: hidden;
 	overflow-y: auto;
 }*/

 .sub_menu_ {
 	background: #e8e6e7 none repeat scroll 0 0;
 	left: 100%;
 	max-width: 233px;
 	position: absolute;
 	width: 100%;
 }

 .sub_menu_ {
 	background: #f5f3f3 none repeat scroll 0 0;
 	border: 1px solid rgba(0, 0, 0, 0.15);
 	display: none;
 	left: 100%;
 	margin-left: 0;
 	max-width: 233px;
 	position: absolute;
 	top: 0;
 	width: 100%;
 }

 .all_conversation ul li:hover .sub_menu_ {
 	display: block;
 }

 .new_message_head button {
 	background: rgba(0, 0, 0, 0) none repeat scroll 0 0;
 	border: medium none;
 }

 .new_message_head {
 	background: rgba(230,240,255,1);
	color: #777777;
 	float: left;
 	font-size: 13px;
 	font-weight: 600;
 	padding: 18px 10px;
 	width: 100%;
	position: relative;
	filter: blur(0px);
	-webkit-filter: blur(0px);
	-moz-filter: blur(0px);
	-ms-filter: blur(0px);
	-o-filter: blur(0px);
	z-index: 999;
	/*backdrop-filter: blur(5	px);*/
 }

.new_message_head::before {
  content: '';
  position: absolute;
  z-index: -1;
  height: 100%;
	width: 100%;
	overflow: hidden;
  top: 0px; right: 0px; left: 0px; bottom: 0px;
	background-image: url(http://cdn.css-tricks.com/images/forums-bg.png);	
	filter: blur(15px);
	-webkit-filter: blur(20px);
	-moz-filter: blur(15px);
	-ms-filter: blur(15px);
	-o-filter: blur(15px);
}

 .message_section {
 	border: 1px solid #dddddd;
 }

 .message_section .row {
 	height: 99vh;
 }

 .chat_area {
 	float: left;
 	overflow-x: hidden;
 	overflow-y: auto;
 	width: 100%;
	margin-bottom: 0px;
	max-height: 82vh;
 }

 .chat_area ul.list-unstyled{
	 margin-bottom: 0px;
	 padding-bottom: 55px;
 }

 .chat_area li {
 	padding: 14px 14px 0;
 }

 .chat_area li .chat-img1 img {
 	height: 40px;
 	width: 40px;
 }

 .chat_area .chat-body1 {
 	margin-left: 50px;
 }

 .chat-body1 p {
 	background: rgba(245,243,243,0.9) none repeat scroll 0 0;
 	padding: 10px;
	border-radius: 10px;
	min-width: 50px;
	max-width: 90%;
	padding-bottom: 7px;
	margin-top: 10px;
	display: block;
 }

 .chat_area .admin_chat .chat-body1 {
 	margin-left: 0;
 	margin-right: 50px;
 }

 .admin_chat .chat-body1.clearfix p {
	 float: right;
	 box-sizing: content-box;
	 position: relative;
	 min-width: 50px;
	 max-width: 90%;
 }

 .partner_chat .chat-body1.clearfix div.image_chat{
	 background: rgba(245,243,243,0.9) none repeat scroll 0 0;
 	 padding: 10px;
	 border-radius: 10px;
	 display: block;
	 max-width: 60%;
	 margin-top: 10px;
	 float: left;
	 box-sizing: content-box;
	 position: relative;
 }

 .partner_chat .chat-body1.clearfix .image_chat::before {
	 display: block;
	 content: '';
	 width: 10px;
	 height: 10px;
	 background-color: rgba(245,243,243,0.9);
	 border-radius: 50%;
	 position: absolute;
	 left: -8px;
	 top: -7px;
 }

 .admin_chat .chat-body1.clearfix div.image_chat{
	 background: rgba(245,243,243,0.9) none repeat scroll 0 0;
 	 padding: 10px;
	 border-radius: 10px;
	 display: block;
	 max-width: 60%;
	 margin-top: 10px;
	 float: right;
	 box-sizing: content-box;
	 position: relative;
 }

 .admin_chat .chat-body1.clearfix .image_chat::before {
	 display: block;
	 content: '';
	 width: 10px;
	 height: 10px;
	 background-color: rgba(245,243,243,0.9);
	 border-radius: 50%;
	 position: absolute;
	 right: -8px;
	 top: -7px;
 }

 .partner_chat .chat-body1.clearfix p {
	 float: left;
	 box-sizing: content-box;
	 position: relative;
	 min-width: 50px;
	 max-width: 90%;
 }

 .admin_chat .chat-body1.clearfix p::before {
	 display: block;
	 content: '';
	 width: 10px;
	 height: 10px;
	 background-color: rgba(245,243,243,0.9);
	 border-radius: 50%;
	 position: absolute;
	 right: -8px;
	 top: -7px;
 }


 .partner_chat .chat-body1.clearfix p::before {
	 display: block;
	 content: '';
	 width: 10px;
	 height: 10px;
	 background-color: rgba(245,243,243,0.9);
	 border-radius: 50%;
	 position: absolute;
	 left: -8px;
	 top: -7px;
 }

 ul.dropdown-menu {
	 min-width: 250px;
	 box-shadow: 0px 4px 8px 2px rgba(25, 25, 25, 0.4);
	 border-radius: 0px;
	 border: none;
 }

 .chat_area li:last-child {
 	padding-bottom: 10px;
 }

 .message_write {
 	background: #f5f3f3 none repeat scroll 0 0;
 	float: left;
 	padding: 15px 15px 15px 15px;
 	width: 100%;
	position: absolute;
	bottom: 0px;
	margin-top: 0px;
	
 }

 .message_write textarea.form-control {
 	/*padding: 10px;*/
	border-radius: 0px;
	border-color: #dddddd;
	box-shadow: none ;
	-webkit-transition: box-shadow .25s ease-in-out;
	-moz-transition: box-shadow .25s ease-in-out;
  transition: box-shadow .25s ease-in-out;
	resize: none;
	overflow-y: auto;
	overflow-x: hidden;
	box-sizing: border-box;
	line-height: 20px;
	height: 50px;	
	min-height: 50px;
	max-height: 100px;
	word-wrap: break-word;
	white-space: pre-wrap;
	text-rendering: optimizeLegibility;
 }

 .message_write textarea.form-control:focus {
 	box-shadow: 0px 5px 8px 2px rgba(25, 25, 25, 0.4);
 }

a.pull-right.btn.btn-success{
	background-color: #777777;
	border-radius: 0px;
	border: none;
}

a.pull-right.btn.btn-success:hover{
	background-color: #dddddd;
	color: #777777;
}

i.fa.fa-paperclip.fa-2x{
	transform:rotateY(180deg);
}

 .chat_bottom {
 	float: left;
 	margin-top: 13px;
 	width: 100%;
 }

 .upload_btn {
 	color: #777777;
	padding: 0px 10px;
 }

 .sub_menu_>li a,
 .sub_menu_>li {
 	float: left;
 	width: 100%;
 }

 .member_list li:hover {
 	background: #428bca none repeat scroll 0 0;
 	color: #fff;
 	cursor: pointer;
 }