@volanar I made it with the following CSS code.
@media (max-width: 767px) {
.slideout-menu .chat-list li .main-avatar .avatar {
    border-radius: 50%;
}}

body.lights-out .recent-replies ul li {
     background: #36393e;
}

.recent-replies ul li p {
    font-size: 12px
}
.recent-replies ul li {
    width: 100%;
    height: 70px;
    line-height: 16px;
    margin-left: 0;
    padding: 10px 10px 10px 10px;
    list-style-type: none;
    border-radius: 8px;
    margin-bottom: 10px;
    background: #ffffff;
}

.recent-replies ul {
    width: 100%;
    height: 100%;
    line-height: 16px;
     margin-left: 0;
    padding: 5px 5px 5px 0;
    list-style-type: none;
}

.recent-replies ul li span {
    font-size: 12px;
    overflow: hidden;
    height: 16px;
    float: left !important;
    margin-left: 15px;
    margin-right: 3px;
}

.recent-replies ul li .avatar {
border-radius: 50%;
}

.recent-replies ul li>div {
    max-height: 35px;
}




span.tag:before {
    content: "\f02c";
    font-family: "Font Awesome 5 Free";
    margin-right: 3px;
    margin-left: 2px;
    font-weight: 600;
	font-size: 9px;
	vertical-align: 0;
}


.fa-chevron-up:before {
    font-family: 'Font Awesome 5 Free';
	font-weight: 600;
	font-size: 17px;
	content: '\f164';
	margin-right: 4px;
	vertical-align: -1px;
}

.fa-chevron-down:before  {
    font-family: 'Font Awesome 5 Free';
	font-weight: 600;
	font-size: 17px;
	content: '\f165';
	margin-right: 4px;
	vertical-align: -1px;
	
}
.topic [component="post/downvote"], .topic [component="post/upvote"] {
    color: #d9d9d9;
}

.answered i, .unanswered i {
    vertical-align: 0;
    margin-right: 2px;
}

.answered, .unanswered {
    border-radius: 4px
}

.posts-list .posts-list-item .topic-title {
    text-decoration: none;

}

.category>ul>li:not(.unread) .card {
    border-color: #e7672e!important;
}

.topic [component="topic/labels"] {
    color: #e7672e;
}

.topic .pagination-block .progress-bar {
    background-color: #e7672e;
    border-radius: 4px 4px 0 0;
}


.input-group-addon {
    
    background-color: #e7672e;
    border: 1px solid #e7672e;
   color: #fff;
}


.tag-topic-count {
    color: #e7672e;
}
.pagination>.active>a, .pagination>.active>a:focus, .pagination>.active>a:hover, .pagination>.active>span, .pagination>.active>span:focus, .pagination>.active>span:hover {
    
    background-color: #e7672e;
    border-color: #e7672e;
    
}

.breadcrumb .fa {
   color: #E7672E;
}
.fab {
    background-color: #E7672E;
}
.badge {
    background-color: #E7672E;
    border-radius: 4px;
}

pre {
    padding: 9.5px;
    margin: 0 0 10px;
    font-size: 13px;
    background-color: #e8ecf3;
    border: 1px solid #e8ecf3;
    border-radius: 4px;
}

.posts-list .posts-list-item .post-body {
    border-right: 2px solid #236ee7;
    
}

.topic .posts .content blockquote {
    font-size: 14px;
    font-style: italic;
}

blockquote {
    border-left: 5px solid #1c74e9;
    background-color: #e8ecf3;
    border-radius: 0 4px 4px 0;
}

.navbar-default .navbar-nav>.active>a, .navbar-default .navbar-nav>.active>a:focus, 
.navbar-default .navbar-nav>.active>a:hover {
    color: #667c99;
    background-color: #e8ecf3;
}

.navbar-default .navbar-nav>li>a {
    color: #667c99;
}

.composer .tags-container [component="composer/tag/dropdown"]>button {
    padding: 6px 12px;
    margin-top: 10px;
}

.categories>li, .category>ul>li {
	margin-left: 0;
    margin-right: 0;
    padding-bottom:0
}

.avatar.avatar-rounded {
    background-color: #e8ecf3;
}


.users-container .users-box {
    width: 138px;
    border: 1px solid #f2f6fc;
    border-radius: 8px;
    background-color: #fff;
    padding-top: 15px;
    margin-left: 0;
}

body.lights-out .users-container .users-box {
 
	border: 1px solid #252a30;
    border-radius: 8px;
    background-color: #36393e;
}


.categories>li, .category>ul>li {
    border-radius: 8px;
    margin-bottom: 10px;
	background-color: #fff;
}

body {
background-color: #e8ecf3;

}

.topic-list-header {
 background-color: #e8ecf3;
 border-top: none;
 border-bottom: none;
}

.btn-default {
    color: #56646f;
    background-color: #ffffff;
    border-color: #e8ecf3;
}

.recent-cards .recent-card-container .recent-card {
	border: 1px solid #ffffff;
    background-color: #ffffff;
}
.topic .topic-header {
	background-color: #e8ecf3;
}

li[component="post"] {
	background-color: #fff;
    border-radius: 8px;
}


body.lights-out .categories>li, body.lights-out .category>ul>li {
background-color: #36393e;
border: 1px solid #252a30;
}

body.lights-out li[component="post"] {
	background-color: #36393e;
}

.categories>li .content h2 a, .category>ul>li .content h2 a, .recent-cards .recent-card-container .recent-card h4 a {
    color: #272c32;
}

.composer .mobile-navbar {
    background: #1c74e9
}

.btn-group>.btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {
    border-radius: 0 4px 4px 0;
}


.composer .resizer .trigger i {
    background-color: #1c74e9;
    border-color: #1c74e9;
}

body.lights-out .btn-primary {
    background-color: #1c74e9;
    border-color: #1c74e9;
    font-weight: 600;
}
.btn-default {
font-weight: 600
}

a {
    color: #1c74e9;
    
}
.btn-primary {
    background-color: #1c74e9;
    border-color: #1c74e9;
    font-weight: 600;
}

body.lights-out .btn-primary.active, body.lights-out .btn-primary.focus, body.lights-out .btn-primary:active, body.lights-out .btn-primary:focus, body.lights-out .btn-primary:hover, body.lights-out .open>.dropdown-toggle.btn-primary {
    background-color: #0e79cf;
    border-color: #0e79cf;
    font-weight: 600;

}

.btn-primary.active, .btn-primary.focus, .btn-primary:active, .btn-primary:focus, .btn-primary:hover, .open>.dropdown-toggle.btn-primary {
    background-color: #0e79cf;
    border-color: #0e79cf;
    font-weight: 600;
}


.selection-tooltip-container {
    border: none;
    background: none;
}

.tag-list .tag {
    background: #f5f5f5;
    padding: 3px 5px;
    color: #667c99;
}

.modal-content {
    border-radius: 8px
}

.topic .posts.timeline [component="topic/event"].timeline-event .timeline-text, .topic .posts.timeline [component="topic/necro-post"].timeline-event .timeline-text {
    line-height: 16px
}

.posts [component=post][data-index="-1"].isSolved {
    border-left: 4px solid #5cb85c !important;
    border-top: 1px solid #5cb85c !important;
    border-bottom: 1px solid #5cb85c !important;
    border-right: 1px solid #5cb85c !important;
    padding: 20px 20px 15px 0px !important;
}

body.lights-out .categories>li .content h2 a, body.lights-out .category>ul>li .content h2 a {
    color: #fff
}

body.lights-out .recent-cards .recent-card-container .recent-card h4 a {
    color: #fff
}


@media (max-width: 767px){
.slideout-panel {padding-top: 50px !important;}
    .topic .topic-header {background: #e8ecf3}
    .btn-default {
        background-color: #fff !important;
        
    }
}

.chat-modal [component="chat/header"], .chats-full [component="chat/header"] {
    background-color: #a46afd
}

@media (max-width: 767px){
.recent-cards.carousel-mode {
    margin-top: 10px
}}
a.permalink {text-decoration: none;
}
#nprogress .bar {
display: none
}


@media (max-width: 767px){

   body.lights-out .topic .topic-header {background: #36393e}
   body.lights-out .btn-default {
        background-color: #252a30 !important;
       color: #ffffff;
   }
}

.topic .posts.timeline .timeline-event:not(:first-child), .topic .posts.timeline>[component=post]:not(:first-child) {margin-bottom: 20px;}

.topic-owner-post [itemprop="author"]:after {
    content: "\f303";
    font-family: 'font awesome 5 free';
    background-image: linear-gradient(to right, #f75, #feaa4a);
    border-radius: 50%;
    color: #fff;
    margin-left: 10px;
    margin-right: 0px;
    vertical-align: middle;
    font-size: 9px;
    padding: 5px;
}

.topic .posts.timeline .timeline-event:not(:first-child), .topic .posts.timeline>[component=post]:not(:first-child) {
    padding-top: 20px;
}

li[component="post"] { border: 1px solid #eee !important;
    margin-bottom: 20px;
    
    padding-right: 30px;
}
li.topic-owner-post {
    padding-top: 20px;
}

.posts-list .posts-list-item {
    margin-bottom: 20px;
    padding: 20px;
}

body.lights-out li[component="post"] { border: 1px solid #252a30 !important;}

.topic .posts.timeline [component=post]:last-child:after {
border-bottom: none !important
}

@media only screen and (max-width: 991px){
.topic .content {
    padding: 0px 20px 0px 20px !important;
}}

@media only screen and (max-width: 991px){
.topic .posts.timeline [component=post]>div:not(.content) {
    padding: 0px 20px 0px 20px !important;
}}

.topic .content {font-size: 16px}

@media (max-width: 991px){
.topic .posts.timeline [component=post] {
    border-bottom: 1px solid #eee;
}}

@keyframes pulsate{0%{opacity:0}100%{opacity:1}}
.unread-count:after {
    animation: pulsate 2s infinite;
    height: 16px;
    min-height: 16px;
}

body.lights-out .fa.fa-lightbulb-o:before {
    content: "\f186";
}

.unread-count:after {
    position: absolute;
    left: 23px;
    top: 10px;
    font-size: 10px;
    text-align: center;
    border: 1px solid #890405;
    color: #fff;
    font-weight: 700;
    min-width: 16px;
    border-radius: 3px;
    background: #c91106;
    padding: 1px 2px;
}

@media (max-width: 767px){.btn {padding: 8px 12px;}}

.navbar-fixed-top {
background: #fff;
}

#content {
    padding-bottom: 20px;
    transition: opacity 0ms linear;
}

@media (max-width: 991px){
.topic h1 .topic-title {
  
    margin-top: 15px;
}}


.chat-modal .chat-content li.chat-message .chat-user a, .expanded-chat .chat-content li.chat-message .chat-user a {
    color: #d9d9d9;
}

.nav-pills>li>a {
    border-radius: 4px;
}
.form-control:focus {box-shadow:none}

.btn, .group-label, .topic .posts .content pre code, .hljs, code, .tag-list .tag .btn-info:hover, .btn-info:focus, .btn-info.focus, .btn-info:active, .btn-info.active, .open>.dropdown-toggle.btn-info, .btn-primary, .btn-primary:hover, .btn-primary:focus, .btn-primary.focus, .btn-primary:active, .btn-primary.active, .open>.dropdown-toggle.btn-primary, .tag-list .tag, .alert-warning
{
    border-radius: 4px
}



.input-group-addon {
    
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}


.announcements-widget {
    padding: 0;
    list-style-type: none;
}


.header .forum-logo {
    height: 35px;
    margin-top: 8px;
    margin-right: 12px;
}

.categories>li .category-children .category-children-item {
    min-width: 110px;
}


code {
    color: #333;
    background-color: #e8ecf3;
}

.hljs{
    background: #e8ecf3;
    color: #33343d;
    padding: 10px;
}

.nav-pills>li.active>a, .nav-pills>li.active>a:focus, .nav-pills>li.active>a:hover {border-radius: 4px}



@media (max-width: 767px){
.header .forum-logo {
     margin-left: 1px; 
}}

.popular-tags > .inline-block {
	width: 100%;
	margin-top: -8px;
	
	&:first-child {
		margin-top: 0;
	}

	&:last-child {
		margin-bottom: -5px;
	}
}

.popular-tags .tag-topic-count {
	float: left;
	width: 20%;
	margin-top: 0px;
	background-color: #cbebf7;
	color: #777;
	padding: 4px 4px 5px 4px;
	border: 0;
	text-align: center;
}

.popular-tags .tag-item {
	float: left;
	width: 80%;
	background-color: #4fc3f7;
	color: white;
	font-weight: 500;
	padding-left: 10px;
	position: relative;
	padding: 5px 5px 4px 10px;
}

.popular-tags-bar {
	background-color: rgba(0,0,0,0.07);
	width: 0px;
	height: 32px;
	position: absolute;
	top: 0px;
	left: 0px;
	-webkit-transition: width 750ms ease-out;
	-moz-transition: width 750ms ease-out;
	-ms-transition: width 750ms ease-out;
	-o-transition: width 750ms ease-out;
	transition: width 750ms ease-out;
}

.topic .posts .content .img-responsive {
    padding: 6px;
    border: 1px solid #c3c3c3;
    background-color: #eee;
    border-radius: 3px;
    margin: 10px;
}

.well {
background-color: #ffffff;
border-radius: 8px;
box-shadow: none;
border: none;

}


.btn-default {
    color: #56646f;
    background-color: #fff;
    border-color: #e8ecf3;
}

.form-control {
    border-radius:4px;
   
}

.btn-default.active, .btn-default.focus, .btn-default:active, .btn-default:focus, .btn-default:hover, .open>.dropdown-toggle.btn-default {
    color: #fff;
    background-color: #667c99;
    border-color: #667c99;
}

.open>.dropdown-menu  {
       border-radius: 4px;
}

.panel-default {
     border-radius: 4px;
     border-color: #e8ecf3;
}

.topic .pagination-block {
        background-color: #fff;
		border-radius: 8px 8px 0 0;
}


.dropdown-menu>li>form>.btn-link, .dropdown-menu>li>form>button {
    color: #f23d37;
}

.alert-warning {
    background-color: #d9534f;
    color: #fff;
    border-color: #d9534f;
}

body.lights-out .pagination a {
    
    background-color: #36393e;
   
}

@media (max-width: 991px){
body.lights-out .topic .posts.timeline [component=post] {
    border-bottom: 1px solid #252a30;
}}

body.lights-out .bg-info {
    background-color: #36393e;
}

body.lights-out .alert-info {
    background-color: #36393e;
    border-color: #252a30;
    color: #ddd;
    border-radius: 4px;
}

body.lights-out .page-register-complete .tos { background: #36393e;}

body.lights-out .chat-list .unread {
    background-color: #252a30;
}

body.lights-out .header .notification-list li.unread, .slideout-menu .notification-list li.unread {background-color: #252a30;}


body.lights-out .alert-danger {
    background-color: #36393e;
    border-color: #252a30;
    color: #999;
    border-radius: 4px
}


body.lights-out .recent-cards .recent-card-container .recent-card {
    
    
    border: 1px solid #252a30;
    background-color: #36393e;
    
}

body.lights-out .topic [component="post/downvote"], .topic [component="post/upvote"] {color: #d9d9d9;}

body.lights-out .topic .topic-info {
    border-bottom: 1px solid #252525;
}


body.lights-out .topic .posts>[component=post] .avatar {
    box-shadow: 0 0 0 0.5rem #36393e;
}


body.lights-out .form-control {
    background-color:#36393e;
    border: 1px solid #252a30;
    color: #d9d9d9;
}


body.lights-out .input-group-addon {
    background-color: #36393e;
    border: 1px solid #252a30;
    
}

body.lights-out .well {
   
    background-color: #36393e;
    
}

body.lights-out .topic .pagination-block .pagination-text {
    color: #d9d9d9
}

body.lights-out .navbar-default .navbar-nav>li>a {color: #fff}

body.lights-out .topic .pagination-block {
    background-color: #36393e;
}

body.lights-out .tag-list .tag {
    background: #36393e;
}



body.lights-out .composer .write {
    background: #36393e;
}

body.lights-out .composer {
    background:  #36393e;
}

body.lights-out .composer .formatting-bar .formatting-group li {
    color: #b3b3b3;
}

body.lights-out .modal-content{
    background-color: #3d4147;
    color: #d9d9d9
}

body.lights-out .account .profile .profile-meta strong {color: #337ab7}

body.lights-out .modal-footer {
    border-top: 1px solid #252a30;
}

body.lights-out code {
    
    color: #898685;
    background-color: #36393e;
    
}

body.lights-out {
    background: none repeat scroll 0 0 #3d4147;
    color: #d9d9d9
}

body.lights-out .navbar-default {
    background-color: #36393e;
    border-color: #d9d9d9
}
  
  
  body.lights-out .topic-header {
    background-color: #3d4147;
}

body.lights-out .topic .topic-info {
    border-bottom: 1px solid #252a30;
}

body.lights-out .dropdown-menu {
    background-color: #36393e;
}

body.lights-out .topic-list-header {
  background-color: #3d4147;
  border-top: 1px solid #252a30;
    border-bottom: 1px solid #252a30;
}

body.lights-out .btn-default {
    color:#d9d9d9;
    background-color: #36393e;
    border-color: #252a30;
}

body.lights-out .dropdown-menu>li>a {
    color: #fff;
}

body.lights-out .chat-modal .modal-header {
    background-color: #337ab7;
    color: #eee;
    border-bottom: 0 solid #252a30;
}

body.lights-out .chat-modal .modal-body {
    background-color: #3d4147;
}

.chat-modal [component="chat/composer"] [component="chat/input"], .chats-full [component="chat/composer"] [component="chat/input"] {
    border: 1px solid #252a30;
}


body.lights-out .panel-body {
    background-color: #3d4147;
    color: #d9d9d9;
}

body.lights-out .panel-default .panel-heading {
    background-color: #36393e;
    color: #d9d9d9;
    border-color: #252a30;
}

body.lights-out .chats-list>li .room-name {color: #fff}

body.lights-out pre {
    
    color: #d9d9d9;
    background-color: #36393e;
    border: 1px solid #252a30;
    border-radius: 4px;
    
}

body.lights-out .posts-list .posts-list-item .topic-title {
    color: #d9d9d9
}

body.lights-out .navbar {
    border:0
}

body.lights-out .category>ul>li .tag-list .tag {
    background-color: #36393e;
}

body.lights-out .list-group-item {
   
    background-color: #36393e;
    border: 1px solid #252a30;
}

body.lights-out .panel {
    background-color: #36393e;
}

body.lights-out .panel-default {
    border-color: #252a30;
}

body.lights-out hr {
    
    border-top: 1px solid #252a30;
}




body.lights-out .bootstrap-tagsinput {
    background-color: #3d4147;
}

body.lights-out .navbar-default .navbar-nav>.open>a, body.lights-out .navbar-default .navbar-nav>.open>a:focus, body.lights-out .navbar-default .navbar-nav>.open>a:hover {
    background-color: #333;
    color: #555;
}

body.lights-out .category>ul>li:not(.unread) h2 a {color: #d9d9d9 !important}


body.lights-out .chat-modal .chat-content li.chat-message .message-body-wrapper .message-body, .expanded-chat .chat-content li.chat-message .message-body-wrapper .message-body:hover {background: transparent}

body.lights-out .chats-list>li .teaser-content {
   color: #6c757d;
}

body.lights-out .chats-list>li:hover {background: #3d4147}

body.lights-out .header .chat-list, .slideout-menu .chat-list {color: #ccc}

body.lights-out .nav-pills>li>a:hover {background: #36393e}


@media (max-width: 767px){
.menu-profile {
    
    background: #3d4147;
}}

@media (max-width: 767px){
.slideout-menu {
    z-index: 10000!important;
    background-color: #36393e;
    background-image: linear-gradient(
145deg
,#36393e,#36393e);
}}

@media (max-width: 767px){
.topic-list-header {
    border-top: none;
    border-bottom: none;
}
}

body.lights-out .page-register-complete .tos {
    background: #252a30;
}

body.lights-out  .table-striped>tbody>tr:nth-of-type(odd) {
    background-color: #252a30;
}

body.lights-out .table-bordered>tbody>tr>td, body.lights-out .table-bordered>tbody>tr>th, body.lights-out .table-bordered>tfoot>tr>td, body.lights-out .table-bordered>tfoot>tr>th, body.lights-out .table-bordered>thead>tr>td, body.lights-out .table-bordered>thead>tr>th {
    border: 1px solid #252a30;
}

body.lights-out .table-bordered {
    border: 1px solid #252a30;
}
Kurulumu.Net

admin
