.card_row{
  height:33%;
}
#box_3{
 background: linear-gradient(135deg, rgba(255,255,255,1) 0%, rgb(243, 243, 243) 36%, rgb(230, 227, 227) 52%, rgb(167, 165, 165) 100%)!important;
  
}

@media(max-width:500px){
  #box_3 .card_text{
    font-size:18px;
  }
 #box_3  .card_custom{
   height:550px;
  }
  
}