/*
 * Yugien 共通CSS基盤
 *
 * 既存ページへの段階導入を前提としています。代表ページでは
 * body.reference-page を付けて読み込みます。
 */

:root {
	color-scheme: light dark;
	--site-bg: #fdfdfd;
	--site-surface: #f4f6fa;
	--site-text: #111;
	--site-muted-text: #4b5563;
	--site-border: rgba(17, 17, 17, 0.2);
	--site-link: #0000ee;
	--site-code-bg: #f1f3f5;
	--site-code-text: #202124;
	--site-focus: #005fcc;
	--site-content-width: 1000px;
}

html[data-theme="light"] {
	color-scheme: light;
}

html[data-theme="dark"] {
	color-scheme: dark;
	--site-bg: #080f04;
	--site-surface: #1b1f23;
	--site-text: #fbfbfa;
	--site-muted-text: #c2c8cf;
	--site-border: rgba(255, 255, 255, 0.25);
	--site-link: #66b3ff;
	--site-code-bg: #222;
	--site-code-text: #f8f8f2;
	--site-focus: #8ec7ff;
}

@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) {
		--site-bg: #080f04;
		--site-surface: #1b1f23;
		--site-text: #fbfbfa;
		--site-muted-text: #c2c8cf;
		--site-border: rgba(255, 255, 255, 0.25);
		--site-link: #66b3ff;
		--site-code-bg: #222;
		--site-code-text: #f8f8f2;
		--site-focus: #8ec7ff;
	}
}

body.reference-page {
	box-sizing: border-box;
	width: 100%;
	max-width: var(--site-content-width);
	margin: 0 auto;
	padding: 1em;
	background-color: var(--site-bg);
	color: var(--site-text);
	line-height: 1.7;
	transition: background-color 0.2s ease, color 0.2s ease;
}

body.reference-page *,
body.reference-page *::before,
body.reference-page *::after {
	box-sizing: inherit;
}

body.reference-page a {
	color: var(--site-link);
}

body.reference-page a:focus-visible,
body.reference-page button:focus-visible {
	outline: 3px solid var(--site-focus);
	outline-offset: 3px;
}

body.reference-page .article-lead {
	max-width: 72ch;
	margin: 1.5rem auto;
	font-size: 1.1rem;
	color: var(--site-muted-text);
}

body.reference-page .soce,
body.reference-page .smp {
	max-width: 100%;
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
}

body.reference-page pre {
	max-width: 100%;
	overflow-x: auto;
	white-space: pre;
}

body.reference-page pre > code {
	white-space: pre;
}

body.reference-page table {
	max-width: 100%;
}

body.reference-page img,
body.reference-page svg,
body.reference-page video {
	max-width: 100%;
	height: auto;
}

body.reference-page .site-header,
body.reference-page .site-footer {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	flex-wrap: wrap;
}

body.reference-page .site-header {
	margin-bottom: 1.5rem;
}

body.reference-page .site-brand {
	font-weight: 700;
}

body.reference-page .theme-switcher {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	margin: 0;
	padding: 0.35rem 0.6rem;
	border: 1px solid var(--site-border);
	border-radius: 0.4rem;
	color: var(--site-text);
}

body.reference-page .theme-switcher legend {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
}

body.reference-page .theme-switcher label {
	white-space: nowrap;
	cursor: pointer;
}

body.reference-page .site-footer {
	margin-top: 3rem;
	padding-top: 1rem;
	border-top: 1px solid var(--site-border);
}

@media (max-width: 640px) {
	body.reference-page {
		padding: 0.75rem;
		font-size: 1rem;
	}

	body.reference-page h1 {
		padding: 0.6em 0.75em;
		font-size: clamp(1.5rem, 7vw, 2rem);
	}

	body.reference-page h2 {
		margin-top: 1.5em;
		padding: 0.5em 0.75em;
		border-width: 0.3em;
	}

	body.reference-page h3 {
		margin-top: 3em;
	}

	body.reference-page p {
		margin-inline: 0.25rem;
	}

	body.reference-page .soce,
	body.reference-page .smp {
		margin-inline: 0;
	}

	body.reference-page .pagetop {
		right: 1rem;
		bottom: 1rem;
		height: 44px;
		width: 44px;
	}
}

@media (prefers-reduced-motion: reduce) {
	body.reference-page {
		transition: none;
	}

	body.reference-page,
	body.reference-page * {
		scroll-behavior: auto;
		transition-duration: 0.001ms !important;
	}
}

@media (forced-colors: active) {
	body.reference-page a:focus-visible,
	body.reference-page button:focus-visible {
		outline: 2px solid Highlight;
	}
}