.container { width: 100%; max-width: 1000px; min-width: 320px; margin: 0 auto; clear: both; }

.col-3 { float: left;  
   width: 27.8%; 
   margin-right: 3.8%; 
   margin-bottom:25px;
   background-color:#ffffff;
   padding:1.5%;


}

.last { margin-right: 0; }


.videomaske{ 
   width: 27.8%; 

  }




@media screen and (max-width:450px) {
   
   .col-3 { 
    margin-right: 0;      
      width:94%; 
      padding:3%;
   }
   
   .videomaske{ 
   width: 94%; 

  }
   
   

   
}