@charset "utf-8";

* {
	margin: 0;
	padding: 0;
}

html {
	font-size: calc(16px + (50vmin / 32));
}

img {
	width: 100%;
	height: 100%;
}

body {
	height: 100%;
	width: 100%;
	max-width: 1000px;
	margin: 0px auto;
	font: normal 1em "Georgia", Serif;
	background-image: url("./images/top_background.png");
	background-attachment: fixed;
	background-repeat: no-repeat;
	background-position: center center;
	background-size: contain;
	text-align: center;
}

a {
        text-decoration: none;
        color: #006;
}

.contents {
	padding-top: 100px;
	padding-bottom: 100px;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
}

.sphere {
	width: 170px;
	aspect-ratio: 1/1;
	border-radius: 50%;
	box-shadow: -30px -30px 50px 5px rgba(0, 0, 0, .5) inset;
	filter: drop-shadow(30px 60px 30px rgba(0,0,0,0.4));
	display: table;
	margin: 30px;
}

.sphere:hover {
	background: rgba( 0, 153, 0, 1);
}

.sphere_text{
	display: table-cell;
	vertical-align: middle;
	font: normal 20px Georgia, Serif;
	font-size: 20px;
}

#irgc110404 {
	font-size: 18px;
}

.sphere_text:hover {
	color: #0ff;
}