#gallery {
   line-height:0;
   -webkit-column-count:5; /* split it into 5 columns */
   -webkit-column-gap:5px; /* give it a 5px gap between columns */
   -moz-column-count:5;
   -moz-column-gap:5px;
   column-count:5;
   column-gap:5px;
}

#gallery img {
   width: 100% !important;
   height: auto !important;
   margin-bottom:5px; /* to match column gap */
}

@media (max-width: 1200px) {
   #gallery {
    -moz-column-count:    4;
    -webkit-column-count: 4;
    column-count:         4;
   }
}

@media (max-width: 1000px) {
   #gallery {
    -moz-column-count:    3;
    -webkit-column-count: 3;
    column-count:         3;
   }
}

@media (max-width: 800px) {
   #gallery {
    -moz-column-count:    2;
    -webkit-column-count: 2;
    column-count:         2;
   }
}

@media (max-width: 400px) {
   #gallery {
    -moz-column-count:    1;
    -webkit-column-count: 1;
    column-count:         1;
   }
}

#f_left  {
float: left;    
 margin: 0 15px 0 0;
}

#no_gloat  {
float:none ;    
 margin: 0 15px 0 0;
}

img {
  filter: none;
}

#gallery img:hover {
   filter:grayscale(75%);
}

area:hover {
  background-color: yellow;
}

header {
  text-align: center;
}

