/* otasuke.app 共通スタイル。dmarc.otasuke.app の LP と同じトークン */
:root {
	--navy: #0b1e3a;
	--navy-100: #b9c6da;
	--navy-300: #6f80a0;
	--teal: #33d6b5;
	--teal-ink: #0a3d33;
	--paper: #f6f8fb;
	--card: #ffffff;
	--ink: #14213d;
	--ink-muted: #5c6478;
	--rule: #d5d9e1;
	--rule-strong: #14213d;
	/* Web フォントは読み込まず端末のフォントを使う。見出しも本文と同じファミリーで、太さで差をつける */
	--display:
		"Noto Sans JP", "Noto Sans CJK JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
		"Yu Gothic UI", Meiryo, system-ui, sans-serif;
	--body:
		"Noto Sans JP", "Noto Sans CJK JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
		"Yu Gothic UI", Meiryo, system-ui, sans-serif;
	--mono: ui-monospace, "SFMono-Regular", Consolas, "Noto Sans Mono", Menlo, monospace;
}
* {
	box-sizing: border-box;
}
html {
	color-scheme: light;
}
body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: var(--body);
	font-size: 15px;
	line-height: 1.75;
}
.wrap {
	max-width: 52rem;
	margin: 0 auto;
	padding-inline: 1.25rem;
}
@media (min-width: 640px) {
	.wrap {
		padding-inline: 2rem;
	}
}

/* ヘッダー */
.hero {
	position: relative;
	overflow: hidden;
	background: var(--navy);
	color: #fff;
	padding-block: 1.75rem 2.75rem;
}
.hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background:
		linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px) 0 0 / 48px 48px,
		linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px) 0 0 / 48px 48px;
	pointer-events: none;
}
.hero .wrap {
	position: relative;
}
.nav {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 1rem;
	font-size: 0.875rem;
	margin-bottom: 2.25rem;
}
.brand {
	color: #fff;
	text-decoration: none;
	font-family: var(--display);
	font-weight: 900;
	font-size: 1.125rem;
	letter-spacing: 0.025em;
	white-space: nowrap;
}
.mark {
	display: inline-block;
	width: 0.75rem;
	height: 0.75rem;
	margin-right: 0.5rem;
	background: var(--teal);
	transform: rotate(45deg);
}
.links {
	display: flex;
	gap: 1.5rem;
}
.links a {
	color: var(--navy-100);
	text-decoration: none;
}
.links a:hover {
	text-decoration: underline;
}
h1 {
	font-family: var(--display);
	font-weight: 900;
	font-size: 2rem;
	line-height: 1.25;
	margin: 0;
	letter-spacing: -0.01em;
	text-wrap: balance;
}
h1 em {
	white-space: nowrap;
	font-style: normal;
	color: var(--teal);
}
.lead {
	color: var(--navy-100);
	margin: 0.75rem 0 0;
	max-width: 40ch;
}

/* ツール一覧 */
main {
	padding-block: 2.25rem 3rem;
}
.section-title {
	display: flex;
	align-items: baseline;
	gap: 0.75rem;
	margin: 0 0 1rem;
	padding-bottom: 0.5rem;
	border-bottom: 2px solid var(--rule-strong);
	font-family: var(--display);
	font-size: 1.125rem;
	font-weight: 700;
}
.section-title small {
	white-space: nowrap;
	font-family: var(--mono);
	font-size: 0.75rem;
	font-weight: 400;
	color: var(--ink-muted);
}
.tools {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 0.875rem;
}
.tool {
	display: block;
	position: relative;
	background: var(--card);
	border: 1px solid var(--rule);
	border-left: 4px solid var(--teal);
	padding: 1rem 1.25rem 1rem 1.125rem;
	color: inherit;
	text-decoration: none;
	transition:
		border-color 0.15s,
		transform 0.15s;
}
.tool:hover {
	border-color: var(--rule-strong);
	border-left-color: var(--teal);
}
.tool:focus-visible {
	outline: 2px solid var(--teal);
	outline-offset: 2px;
}
.tool-name {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.25rem 0.75rem;
	margin: 0;
	font-family: var(--display);
	font-size: 1.0625rem;
	font-weight: 700;
}
.tool-host {
	font-family: var(--mono);
	font-size: 0.75rem;
	font-weight: 400;
	color: var(--ink-muted);
}
.tool-desc {
	margin: 0.25rem 0 0;
	color: var(--ink-muted);
	font-size: 0.9375rem;
}
.tool-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 0.375rem;
	margin: 0.625rem 0 0;
	padding: 0;
	list-style: none;
}
.tool-tags li {
	font-family: var(--mono);
	font-size: 0.6875rem;
	letter-spacing: 0.04em;
	color: var(--teal-ink);
	background: #e3f7f1;
	padding: 0.1rem 0.5rem;
	border-radius: 999px;
}
.note {
	margin: 2.5rem 0 0;
	font-size: 0.875rem;
	color: var(--ink-muted);
	max-width: 46rem;
}
.note a,
.prose a {
	color: var(--ink);
	text-decoration: underline;
	text-underline-offset: 2px;
}
.note a:hover,
.prose a:hover {
	color: var(--ink-muted);
}

/* 本文ページ(プライバシー等) */
.prose > * {
	max-width: 46rem;
}
.prose h2 {
	font-family: var(--display);
	font-size: 1.125rem;
	margin: 2rem 0 0.5rem;
	padding-top: 0.75rem;
	border-top: 1px solid var(--rule);
}
.prose h3 {
	font-family: var(--display);
	font-size: 1rem;
	margin: 1.25rem 0 0.25rem;
}
.prose > h2:first-child {
	margin-top: 0;
	padding-top: 0;
	border-top: 0;
}
.prose p,
.prose ul,
.prose ol {
	margin: 0.5rem 0;
}
.prose li + li {
	margin-top: 0.25rem;
}
.prose code {
	font-family: var(--mono);
	font-size: 0.875em;
	background: #eef0f4;
	padding: 0.1em 0.35em;
	border-radius: 3px;
	overflow-wrap: anywhere;
}
.prose pre {
	margin: 0.75rem 0;
	padding: 0.75rem 1rem;
	background: var(--card);
	border: 1px solid var(--rule);
	border-left: 4px solid var(--navy-300);
	overflow-x: auto;
	font-family: var(--mono);
	font-size: 0.8125rem;
	line-height: 1.6;
}
.prose pre code {
	background: none;
	padding: 0;
	font-size: inherit;
	overflow-wrap: normal;
}
.prose strong {
	font-weight: 700;
}

/* ブログ */
.hero .crumbs {
	margin: -1.25rem 0 1rem;
	font-size: 0.75rem;
	color: var(--navy-100);
}
.crumbs ol {
	display: flex;
	flex-wrap: wrap;
	gap: 0 0.5rem;
	margin: 0;
	padding: 0;
	list-style: none;
}
.crumbs li + li::before {
	content: "/";
	margin-right: 0.5rem;
	color: var(--navy-300);
}
.crumbs a {
	color: var(--navy-100);
}
.hero h1.post-title {
	font-size: 1.625rem;
	line-height: 1.35;
}
@media (min-width: 640px) {
	.hero h1.post-title {
		font-size: 2rem;
	}
}
.prose .meta {
	margin: 0 0 1.25rem;
	font-size: 0.8125rem;
	color: var(--ink-muted);
}
.series {
	margin: 2.5rem 0 0;
	padding: 1rem 1.25rem;
	background: var(--card);
	border: 1px solid var(--rule);
	border-left: 4px solid var(--teal);
	font-size: 0.875rem;
}
.prose .series h2 {
	margin: 0 0 0.25rem;
	padding: 0;
	border: 0;
	font-size: 0.9375rem;
}
.series ol {
	padding-left: 1.25rem;
}
.series [aria-current="page"] {
	font-weight: 700;
}
.posts {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 0.875rem;
}
.post {
	display: block;
	background: var(--card);
	border: 1px solid var(--rule);
	padding: 0.875rem 1.25rem;
	color: inherit;
	text-decoration: none;
	transition: border-color 0.15s;
}
.post:hover {
	border-color: var(--rule-strong);
}
.post:focus-visible {
	outline: 2px solid var(--teal);
	outline-offset: 2px;
}
.post-name {
	margin: 0;
	font-family: var(--display);
	font-size: 1rem;
	font-weight: 700;
	line-height: 1.5;
}
.post-desc {
	margin: 0.25rem 0 0;
	color: var(--ink-muted);
	font-size: 0.875rem;
}
.post-date {
	display: block;
	margin-top: 0.375rem;
	font-family: var(--mono);
	font-size: 0.6875rem;
	color: var(--ink-muted);
}
.more {
	margin: 1rem 0 0;
	font-size: 0.875rem;
}
.more a {
	color: var(--ink);
	text-decoration: underline;
	text-underline-offset: 2px;
}
.section-title + .posts,
.section-title + .tools {
	margin-top: 0;
}
.tools + .section-title,
.note + .section-title {
	margin-top: 3rem;
}

/* フッター */
.foot {
	padding-block: 2rem;
	font-size: 0.75rem;
	color: var(--ink-muted);
	border-top: 1px solid var(--rule);
}
.foot nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.25rem 1rem;
}
.foot a {
	color: inherit;
	text-decoration: underline;
	text-underline-offset: 2px;
}
.foot a:hover {
	color: var(--ink);
}
a:focus-visible {
	outline: 2px solid var(--teal);
	outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
	.tool,
	.post {
		transition: none;
	}
}