.ms_post{
    width: 30%;
    padding-top: 24%;
    position: relative;
    background-position: center;
    background-size: cover;
    display: inline-block;
    margin: 1%;
}

.ms_post a{
    border: 2px solid green;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
}
.ms_post img{
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

@media screen and (max-width: 850px) {
    .ms_post{
        width: 47%;
        padding-top: 33%;
        position: relative;
        background-position: center;
        background-size: cover;
        display: inline-block;
        margin: 1%;
    }
  }


@media screen and (max-width: 550px) {
    .ms_post{
        width: 100%;
        padding-top: 70%;
        position: relative;
        background-position: center;
        background-size: cover;
        display: inline-block;
        margin-bottom: 1%;
    }
  }
  

  .nascondi{
    display: none !important;
  }