index.css

*{
    padding:0px;
    margin:0px;
    box-sizing: border-box;
    font-family: sans-serif;
    font-size: 1;
}
.parent{
     display: flex;
     justify-content: space-around;
     align-items: center;
    height:100vh;
    max-width:100%;
    background-color: black;
    
    margin:auto
}
.origin{
  
   height: 80%;
   width:30%;
   background-color:black;
   border: 2px dashed  #4AAE9B;
 
 
}
.draggable-item{
    position: relative;
    top:15%; 
    text-align: center;
    width:40%;
   
    background-color: #4AAE9B;
  
    font-weight: normal;
     border-style: none;
     border-radius: 3%;
    margin: auto;
    margin-bottom: 1rem;
    padding: 2rem;
}


.dropzone{
   
    text-align: center;
    padding: 1rem;
  height: 80%;
  width:30%;
  background-color: black;
  border:2px dashed  #4AAE9B;

  

}
.dragging{
    background-color: #D0F5BE;
    display: hidden;
}

.dropping{
    background-color: #00DFA2;
}
.reset-btn{

  position: absolute;
  top: 80%;
 
 background-color: #4AAE9B;
 color: black;
 font-weight: 800;
 padding: 1.2rem;
 text-align: center;
 border-style: none;
 border-radius: 17%;
 

   

}
.instruction{
    margin: auto;
    position: relative;
    top:20%;
    width: 60%;
    text-align:justify;
    color:#4AAE9B;
   padding: 1rem;
   font-weight: bolder;
   
   
}
.instruction li{
    list-style: none;
    margin: 0.9rem;line-height: 1.5rem;
}



@media (min-width: 30em) and (max-width: 80em) {
    .parent{
        display: flex;
        flex-direction: column;
    }
    .origin{
     height: 30%;
     width:60%;
     margin: 2rem;
    }
    .dropzone{
        text-align: center;
      height:60%;
      width: 60%;
      margin:0.5rem;
    }
    
    .draggable-item{
        width:65%;
        padding: 0.5rem;
    }

    .reset-btn{
      top:88%;
      left: 44%;
      padding: 0.5rem;
    }
    
    
}

@media only screen and (max-width: 115em) {
    .instruction{
        display: none;
    }
}