.thumb {
    margin-bottom:1.1rem;
}

.thumb img{
    border:none;
    padding:0;
}

.caption {
    padding-top:.75rem;
    margin:0;
    font-family: 'Nunito Sans',sans-serif;
    font-weight: 300;
    line-height:1;
}
 
 .w-20 {
  -webkit-box-flex: 0;
      -ms-flex: 0 0 50% !important;
          flex: 0 0 50% !important;
  max-width: 50%;
}

 @media (min-width: 768px){ .w-20 {
  -webkit-box-flex: 0;
      -ms-flex: 0 0 25% !important;
          flex: 0 0 25% !important;
  max-width: 25%;
}}

 @media (min-width: 1200px){ .w-20 {
  -webkit-box-flex: 0;
      -ms-flex: 0 0 20% !important;
          flex: 0 0 20% !important;
  max-width: 20%;
}}

.w-20 {
  padding:.5rem;
}

.w-20 img{
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;margin-bottom:.25rem
}

a.darken img {
    display: block;

    -webkit-transition: all 0.5s linear;
       -moz-transition: all 0.5s linear;
        -ms-transition: all 0.5s linear;
         -o-transition: all 0.5s linear;
            transition: all 0.5s linear;
}

a.darken:hover img {
    opacity: 0.7;

}