* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans KR";
  color: #666666;
}

header {
  margin-left: 5px

}
/* The grid: Four equal columns that floats next to each other */
.column {
  float: left;
  padding: 6px;
}

/* Style the images inside the grid */
.column img {
  opacity: 1; 
  cursor: pointer; 
}

.column img:hover {
  opacity: 0.8;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* The expanding image container (positioning is needed to position the close button and the text) */
.container {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  padding-top: 46px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  max-height: 700px;
  text-align: center;
}

/* Closable button inside the image */
.close {
  position: absolute;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  transition: 0.3s;
  cursor: pointer;
}