:root {
	color-scheme: light;
	--bg: #f4f5f7;
	--paper: #ffffff;
	--ink: #17191d;
	--muted: #5c6570;
	--line: #e3e6eb;
	--accent: #2457d6;
	--accent-soft: #e8eefc;
	--shadow: 0 10px 28px rgba(23, 25, 29, 0.06);
}

* { box-sizing: border-box; }

body {
	margin: 0;
	min-height: 100vh;
	background: var(--bg);
	color: var(--ink);
	font-family: "Yu Gothic UI", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
	line-height: 1.7;
}

a {
	color: var(--accent);
}

a:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 3px;
}

.site-header {
	position: sticky;
	top: 0;
	z-index: 2;
	background: rgba(244, 245, 247, 0.92);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--line);
}

.header-inner,
.wrap {
	width: min(68rem, calc(100% - 2rem));
	margin: 0 auto;
}

.header-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	min-height: 4rem;
}

.brand {
	color: var(--ink);
	font-weight: 750;
	font-size: 1.05rem;
	letter-spacing: 0.01em;
	text-decoration: none;
}

.brand span {
	color: var(--accent);
}

.site-nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.35rem 0.9rem;
	font-size: 0.92rem;
}

.site-nav a {
	color: var(--muted);
	text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
	color: var(--ink);
}

.site-nav .here {
	color: var(--ink);
	font-weight: 700;
}

.wrap {
	padding: 2.5rem 0 3.5rem;
}

.hero {
	margin: 0 0 2.25rem;
}

.hero h1 {
	margin: 0 0 0.45rem;
	font-size: clamp(1.8rem, 4vw, 2.5rem);
	line-height: 1.25;
	letter-spacing: 0.01em;
}

.eyebrow {
	margin: 0 0 0.45rem;
	font-size: 0.82rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	color: var(--accent);
}

.hero p {
	margin: 0;
	max-width: 40rem;
	color: var(--ink);
}

.section h2.lead-title {
	margin: 0 0 0.75rem;
	font-size: 1.35rem;
	line-height: 1.4;
	letter-spacing: 0;
	color: var(--ink);
}

.lead-note {
	margin: -0.35rem 0 0.2rem;
	color: var(--muted);
}

.kinds {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 0.85rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.kinds li {
	padding: 1.1rem 1.15rem 1.15rem;
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 1rem;
}

.kinds h3 {
	margin: 0 0 0.35rem;
	font-size: 1.02rem;
}

.kinds p {
	margin: 0;
	color: var(--muted);
	font-size: 0.92rem;
}

.section {
	margin-top: 2rem;
}

.section h2 {
	margin: 0 0 0.8rem;
	font-size: 0.82rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	color: var(--muted);
}

.cards {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(16.5rem, 1fr));
	gap: 0.85rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.card {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
	min-height: 9.5rem;
	padding: 1.15rem 1.15rem 1rem;
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 1rem;
	color: inherit;
	text-decoration: none;
	box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
	overflow: hidden;
}

.card.has-image {
	padding: 0 0 1rem;
}

.card img {
	display: block;
	width: 100%;
	aspect-ratio: 3 / 2;
	object-fit: contain;
	background: #f6f7f9;
}

.card.has-image .kicker {
	margin-top: 0.9rem;
	padding: 0 1.15rem;
}

.card.has-image h3,
.card.has-image p,
.card.has-image .open {
	padding: 0 1.15rem;
}

.card:hover,
.card:focus-visible {
	border-color: #c5d0ea;
	box-shadow: var(--shadow);
}

.kicker {
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	color: var(--accent);
}

.kicker.game { color: #0f766e; }
.kicker.illust { color: #9a3412; }

.card h3 {
	margin: 0;
	font-size: 1.08rem;
	line-height: 1.45;
}

.card p {
	margin: 0;
	color: var(--muted);
	font-size: 0.92rem;
}

.card .open {
	margin-top: auto;
	padding-top: 0.8rem;
	font-size: 0.84rem;
	font-weight: 700;
	color: var(--accent);
}

.doc {
	max-width: 42rem;
	padding: 1.6rem 1.4rem 1.8rem;
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 1rem;
}

.doc h1 {
	margin: 0 0 0.8rem;
	font-size: 1.7rem;
	line-height: 1.35;
}

.doc h2 {
	margin: 1.6rem 0 0.35rem;
	font-size: 1.05rem;
}

.doc p,
.doc li {
	margin: 0.35rem 0;
}

.doc ul {
	margin: 0.2rem 0 0.4rem;
	padding-left: 1.2rem;
}

.site-footer {
	border-top: 1px solid var(--line);
}

.footer-inner {
	width: min(68rem, calc(100% - 2rem));
	margin: 0 auto;
	padding: 1.2rem 0 1.6rem;
	color: var(--muted);
	font-size: 0.86rem;
}

.footer-inner p {
	margin: 0.7rem 0 0;
}

@media (max-width: 40rem) {
	.header-inner {
		align-items: flex-start;
		flex-direction: column;
		padding: 0.8rem 0;
	}

	.kinds {
		grid-template-columns: 1fr;
	}

	.wrap {
		padding-top: 1.6rem;
	}

	.doc {
		padding: 1.2rem 1rem 1.4rem;
	}
}