main, #footlinks {
  margin: 1.2rem 9vw 2.4rem;
}

nav ul {
  display: block;
  margin: 36px 0 12px;
  text-align: center;
}
nav li, nav a {
  display: inline;
}
nav li {
  margin: 0 0.4rem;
}
nav a {
  background: transparent;
}

h1, h2 {
  text-align: center;
}

/* ↓ サイトトップページへ戻るためのボタン設定 ↓ */
/*参考サイト:https://cotodama.co/pagetop/*/
#site_top {
	width: 105px;
	height: 80px;
	position: fixed;
	right: 0;
	bottom: 0;
	background: #333;
	opacity: 0.6;
	border-radius: 15px;
}

#site_top a {
	position: relative;
	display: block;
	width: 100px;
	height: 60px;
	text-decoration: none;
}

#site_top a::before {
	font-family: 'Font Awesome 5 Free';
	font-weight: 900;
	content: '\f102';
	font-size: 25px;
	color: #fff;
	position: absolute;
	width: 25px;
	height: 25px;
	top: -25px;
	bottom: 0;
	right: 0;
	left: 0;
	margin: auto;
	text-align: center;
}

#site_top a::after {
	content: 'K.Kishimoto のトップへ戻る';
	font-size: 13px;
	color: #fff;
	position: absolute;
	top: 30px;
	bottom: 0;
	right: 0;
	left: 0;
	margin: auto;
	text-align: center;
}

/* ↑ サイトトップページへ戻るためのボタン設定 ↑ */


#footlinks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
}
#footlinks section:nth-child(even) {
  margin-left: 1.2rem;
}