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

/*main-----------------------------------------*/
body {
	background-color: #FFFFFF;
	color: #333333;
	width: 100%;
	margin: 0px;
	font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
	position: relative;
	overflow-x: hidden;
}

#backgroundCanvas {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: -1;
	pointer-events: none;
}

h1{
	text-decoration: none;
	font-size: 54px;
	font-weight: bold;
	margin: 120px 0 50px 0;
}

a{
	text-decoration: none;
	color: #000;
}

a:hover{
	text-decoration: underline;
	color: #333;
}

dl dt {
	width: 80px;
	float: left;
	clear: both;
	font-weight: bold;
}
dl dd {
	padding: 0 0 10px 80px;
}

#container{
	margin: 0 0 50px 0;
	position: relative;
	margin-left: auto;
	margin-right: auto;
	width: 1000px;
	margin-top: 0;
}

/* サムネイル */
.thumbnail-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 50px 0 0;
  justify-content: space-between;
  box-sizing: border-box;
}

.thumb {
  flex: 0 0 calc(33.333% - 11px);
  box-sizing: border-box;
}

.thumb img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

/* フッター */
.site-footer {
  background-color: #f9f9f9;
  text-align: center;
  padding: 14px 16px;
  font-size: 14px;
  color: #666;
  border-top: 1px solid #ddd;
}

.site-footer p {
  margin: 0;
}

@media screen and (max-width: 768px) {
  #container {
    width: auto;
    padding: 0 16px;
  }
  dl dd {
    padding-left: 50px;
  }
  .thumb {
    flex: 0 0 calc(50% - 8px); /* 2列 */
  }

}