* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	margin: 8px;
}

body::before {
	content: '';
	position: fixed; /* スマホでも固定 */
	top: 0;
	left: 0;
	width: 100%;
	height: 120vh; /* 画面全体を覆う */
	background-image: url('../image/background.png');
	background-size: cover; /* 必要ならカバーサイズ指定 */
	background-position: center;
	background-repeat: no-repeat;
	z-index: -1; /* コンテンツの下に */
}

h1,
h2,
h3,
h4,
h5,
h6 {
	font-family: 'Zen Maru Gothic', 'メイリオ', sans-serif;
	color: #ffffff;
	margin: 0;
}

h1 {
	font-weight: 900;
	font-size: 36px;
}

h2 {
	font-weight: 700;
	font-size: 28px;
}

h3 {
	font-weight: 400;
	font-size: 18px;
}

h4 {
	font-weight: 400;
	font-size: 14px;
}

h5 {
	font-weight: 400;
	font-size: 14px;
}

h6 {
	font-weight: 400;
	font-size: 14px;
}

a {
	font-family: 'Zen Maru Gothic', 'メイリオ', sans-serif;
}

a.logo-text {
	text-decoration: none;

	h1 {
		text-align: center;
		margin-top: 80px;
		text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
	}
}

h2.title-text {
	padding: 32px 0 16px 0;
	text-align: center;
	text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

div.top {
	color: #ffffff;
	text-align: center;
	text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
	margin-bottom: 16px;

	img {
		display: block;
		margin: 24px auto;
		width: 120px;
		height: auto;
	}

	h2 {
		margin-bottom: 16px;
	}
}

.content {
	@media screen and (max-width: 600px) {
		width: 100%;
	}
	@media screen and (min-width: 601px) {
		width: 600px;
	}

	position: relative;
	background-color: #ffffff;
	text-decoration: none;
	text-align: start;
	margin: 0 auto 16px auto;
}

span {
	font-family: 'Zen Maru Gothic', 'メイリオ', sans-serif;
	font-size: 24px;
	color: #000000;
	font-weight: 400;
	position: absolute;
	right: 16px;
	top: 50%;
	transform: translateY(-50%);
}

.content-link {
	display: grid;
	grid-template-rows: 40px 40px;
	grid-template-columns: 80px 1fr;
	border-radius: 8px;
	cursor: pointer;

	img {
		grid-row: 1 / 3;
		grid-column: 1 / 2;
		margin: auto 0 auto 8px;
		width: 64px;
		box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
		border-radius: 8px;
	}

	img.small {
		padding: 8px;
	}

	h3 {
		grid-row: 1 / 2;
		grid-column: 2 / 3;
		color: #000000;
		margin-top: 8px;
	}

	h4 {
		grid-row: 2 / 3;
		grid-column: 2 / 3;
		color: #000000;
		margin-bottom: 4px;
	}

	span::before {
		content: '＋';
	}
}

details[open] {
	summary {
		margin: 0 auto 0 auto;
		border-radius: 8px 8px 0px 0px;
	}
	span::before {
		content: 'ー';
	}
}

summary:focus {
	outline: none;
}

.info {
	display: flex;
	flex-direction: column;
	gap: 24px;
	padding: 24px 8px 24px 8px;
	border-radius: 0px 0px 8px 8px;

	h3,
	h5 {
		color: #999999;
		text-align: center;
	}

	.app-buttons {
		display: flex;
		gap: 8px;

		a {
			width: 100%;
			height: auto;
			box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
			border-radius: 8px;
			padding: 8px;
			align-items: center;
			display: flex;
			justify-content: center;

			img {
				width: 32px;
			}
		}

		.apple {
			background-color: #2d48d1;
		}

		.google {
			background-color: #19e83c;
		}

		.steam {
			background-color: #4dabe9;
		}
	}

	iframe {
		width: 100%;
		height: auto;
		aspect-ratio: 16 / 9;
	}

	h4 {
		color: #000000;
	}
}

footer {
	margin: 120px auto 0 auto;

	h6 {
		text-align: center;
		color: #ffffff;
		margin-bottom: 16px;

		a {
			color: #ffffff;
		}
	}
}