.cluster{
  height: 100%;
  width: 100%;
  padding:10px;
  padding-bottom:100px;
  }
 
 .cluster td, th{
    color:black;
    border-bottom: none;
    margin: 0;
    width: 180px;
    height: 50px;
    background-color: rgba(255,255,255,0.5);
    padding: 15px;
    border:15px solid rgba(255,255,255,0);
    background-clip:padding-box;
    -webkit-background-clip:padding-box;
    text-overflow: hidden;
    vertical-align: center;
    text-align: center;
    border-radius: 20px;
 }
 
.cluster a{
    transition: all 0.2s;
    color: black;
    font-size:14px;
 }
 
.cluster p{
     margin: 0;
 }
 
 .block-title {
    padding-left: 25px;
}

img:hover {
  -webkit-filter: grayscale(100%);
  -webkit-transition: .5s ease-in-out;
  -moz-filter: grayscale(100%);
  -moz-transition: .5s ease-in-out;
  -o-filter: grayscale(100%);
  -o-transition: .5s ease-in-out;
  filter: grayscale(100%);
} 

img {
  -webkit-filter: grayscale(0%);
  -webkit-transition: .5s ease-in-out;
  -moz-filter: grayscale(0%); 
  -moz-transition: .5s ease-in-out;
  -o-filter: grayscale(0%); 
  -o-transition: .5s ease-in-out;
  filter: grayscale(0%);
}