@charset "utf-8";
/* CSS Document */

body {
	font-family: Arial, Helvetica, sans-serif;
}
.content {
    display: flex;
  flex-direction: column;
  justify-content: center;
}
.box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  border: 4px #000000 solid;
}
.box a {
	display: block;
	margin: 25px 20px;
}
.box a img {
	filter: grayscale(0%);
}
.box a:hover img {
	filter: grayscale(100%);
}