* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial;
  height: 100%;
  overflow: hidden;
}

.header {
  text-align: center;
  padding: 32px;
}

.row {
  display: -ms-flexbox; /* IE10 */
  display: flex;
  -ms-flex-wrap: wrap; /* IE10 */
  flex-wrap: wrap;
  padding: 0 4px;
}

/* Create four equal columns that sits next to each other */
.column {
  -ms-flex: 25%; /* IE10 */
  flex: 25%;
  max-width: 25%;
  padding: 0 4px;
}

.column img {
  margin-top: 8px;
  vertical-align: middle;
  width: 100%;
}

/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 800px) {
  .column {
    -ms-flex: 50%;
    flex: 50%;
    max-width: 50%;
  }
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
  .column {
    -ms-flex: 100%;
    flex: 100%;
    max-width: 100%;
  }
}

img {
  /*filter: grayscale(100%);*/
  transition: all 0.3s;
}

img:hover {
  filter: grayscale(0%);
  transition: all 0.3s;
  cursor: pointer;
}
.photo-grid {
  position: absolute;
}
.contact-link-div{
  position: absolute;
  z-index: 9;
  bottom: 0;
  width: 100%;
  background: #f87f01;
  padding: 16px 0px;
  text-align: center;
}
.contact-link {
  text-decoration: none;
  font-size: 24px;
  color: white;
  text-transform: uppercase;
}
.contact-link-div p{
  font-size: 18px;
  color: white;
  text-transform: uppercase;
}
.contact-link-div p a{
    text-decoration: none;
    color: white;
}