JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>

<div class="structure">
    <div class="lvl1">
        <div class="obertka">
            <div class="small_cart">
                some html
                <div class="opening">20 отделов</div>
            </div>
            <div class="full_cart closed">
              <span class="close_cart"><i class="demo-icon icon-left">&#xe800;</i>
              Закрыть карточку</span>
              some html
            </div>
        </div>
        <div class="lvl2">
            <div class="obertka">
                <div class="small_cart">
                    some html
                    <div class="opening">20 отделов</div>
                </div>
                <div class="full_cart closed">
					        <span class="close_cart"><i class="demo-icon icon-left">&#xe800;        </i>Закрыть карточку</span>
                  some html
                </div>
            </div>
            <div class="acc">
                <div class="lvl3">
                    <div class="obertka">
                        <div class="small_cart">
                            some html
                            <div class="opening">20 отделов</div>
                        </div>
                        <div class="full_cart closed">
							              <span class="close_cart"><i class="demo-icon icon-left">&#xe800;</i>Закрыть карточку</span>
                            some html
                        </div>
                    </div>
                    <div class="lvl4">
                        <div class="obertka">
                            <div class="small_cart">
                            	some html    
                              <div class="opening">20 отделов</div>
							               </div>
                            <div class="full_cart closed">
								                <span class="close_cart"><i class="demo-icon icon-left">&#xe800;</i>Закрыть карточку</span>
                     ...

CSS

.structure {
  float: left;
  width: 100%;
}
.lvl2, .lvl3, .lvl4 {
  width: calc(100% - 60px);
  padding-left: 60px;
  float: left;
}
.obertka {
  padding: 5px;
  margin: 10px;
  float: left;
  width: 80%;
  border: 1px solid blue;
}
.opening {
  background: rgba(0,0,0,.5);
}
.close_cart {
  border: 3px solid red;
  float: left;
}
.full_cart {
  width: 100px;
  height: 100px;
  background: green;
}
.closed {
  background: magenta;
}

JavaScript

$('.opening').on( "click", function() {
		$(this).parent().parent().find('.full_cart').addClass('closed');
 		$(this).parent().parent().find('.full_cart').removeClass('closed');
	});