JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flex-container">
   <div class="item">
      <div class="box">
         <div class="inner text-uppercase margin">
            Text text<br />
            Text text
         </div>
      </div>
   </div>
   <div class="item margin">
      <div class="box">
         <div class="inner">
            <article>               
               <h2 class="text-uppercase ls">Slogan</h2>
               <hr class="main_hr" style="background-color: #9f6a4a;" align="center">
               <div class="copy">
                 <br>
                  <p>Text text text
                  </p>
               </div>
            </article>
         </div>
      </div>
   </div>
   <div class="item third margin">
      <div class="box">
         <div class="inner">
            <article>               
               <h2 class="text-uppercase ls">Text</h2>
               <hr class="main_hr" style="background-color: #9f6a4a;" align="center">
               <div class="copy">
                <br>
                  <p>More text
	           </p>

               </div>
            </article>
         </div>
      </div>
   </div>   
   <div class="item">
         <img class="sppb-img-responsive first" src="https://picsum.photos/600/600">      
   </div>   
</div>

CSS

.flex-container {
	display:-webkit-box;
	display:flex;
	display: -ms-flexbox;
	-ms-flex-wrap: wrap;
	-o-flex-wrap: wrap;
	flex-wrap:wrap;
	-ms-flex-wrap: wrap;	
	text-align:center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
		justify-content: center;   
    color: #fff;  
}
.flex-container .item h2{
  /*letter-spacing: 0.4em;*/
  font-size: 1.1em;
  font-weight: 300;
}

.flex-container>div {    
  /*margin:5px;*/
  /*flex: 0 1 calc(50% - 10px);  */
  -webkit-box-flex: 0;
      -ms-flex: 0 1 50%;
          flex: 0 1 50%;  
  -webkit-box-sizing:border-box;  
          box-sizing:border-box;   
  max-width: 50%;
} 

.flex-container .item:first-child { 
  background: #986a4b;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;  
  -webkit-box-align: center;  
      -ms-flex-align: center;  
          align-items: center;  
  text-align: left; 
}

.flex-container .item.third, .flex-container .item.third article{
  background: #fff;
  color:#986a4b;
}

.flex-container .item:nth-child(4) {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;  
}

/*IE11*/
.flex-container .item .pirmas{height: /*100%;*/ auto; min-height: 1px;}
.flex-container .item img {     
    width: 100%;
}
.flex-container .item:not(img){
  padding: 1em;
}

.flex-container .item { 
  display: -webkit-box; 
  display: -ms-flexbox; 
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  text-align: center;   
  color: #fff;
  font-size: 0.9em;  
}

.flex-container .item {
	background: #fff;
}

.flex-container .margin{padding:60px;}

.flex-container article {
	color: #9f6a4a;
}


@media screen and (max-width: 1000px){    
  .flex-container .item .box .inner{font-size:1.5em;}  
 ...