*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-size: 100%;
  font-weight: normal;
}

body {
	background-image: linear-gradient(to right bottom , rgb(1,12,35), rgb(13, 51, 59));
  background-repeat: no-repeat; 
	font-family: 'Noto Serif KR', serif; 
	min-height: 100vh;
	padding: 20px;
	overflow: hidden;
}

a.home {
	font-size: 38px;
	line-height: .25;
	color: rgba(162, 184, 183, 0.3);
	text-decoration: none;
	text-shadow: 4px 8px 10px rgb(60,85,84);
	transition: 1s;
	position: absolute;
	top: 1%;
	left: 1%;
}

h1 {
	margin: 25px 0 50px 0;
	font-size: 20px;
	color: rgba(243, 243, 243, 0.3);
	font-weight: normal;
	text-align: center;
}

h2 {
	margin-bottom: 10px;
	color: black;
	font-size: 25px;
}

div.column {
	width: 50%;
	margin-right: 20px;
}

div.column_side{
	width: 20%;
}

div.column_side, div.column {
	float: left;
	padding: 20px;
	height: 700px;
	color: black;
	font-size: 17px;
	line-height: 1.7;
	text-align: left;
	background-color: rgb(177, 183, 194 , 0.3);
	border-radius: 20px;
	overflow: auto;
}

div.row {
	margin-top: 4%;
	margin-left: 18%;
}

.row:after{
  content: "";
  display: table;
  clear: both;
}

p {
	margin-bottom: 50px;
}

a {
	text-decoration: none;
	color: black;
	transition: 1s;
}

a:hover {
	color: rgb(162, 184, 183);
}

a.sebald {
	color: rgba(243, 243, 243, 0.3);
}

span:hover {
	color: rgba(134, 169, 166, 0.9);
}

.hovertext {
 	position: relative;
}

.hovertext:before {
	content: attr(data-hover);
	visibility: hidden;
	opacity: 0;
	text-align: left;
	transition: opacity 1s;
	position: absolute;
	z-index: 1;
	top: 100%;
	font-size: 13px;
	width: 300px;
}

.hovertext:hover:before {
	opacity: 1;
	visibility: visible;
}

@media screen and (max-width:600px) {

.row {
	float: none;
	margin: 0 0;
}

div.column {
	margin: ;
	width: 300px;
	height: 400px;
}
div.column, div.column_side {
  	font-size: 15px;
  }

}