/*
Theme Name: Tategumi
Theme URI: https://www.e-dako.com/
Author: Ryosuke KODA
Author URI: https://www.e-dako.com/
Description: 長い日本語の文章を読むためのテーマ。記事は既定で縦書きに組まれ、ワンタップで横書きに戻せます。行送りグリッドに沿ったページ送り、文字サイズと配色の切り替え、目次パネルを備えています。
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.8
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tategumi
Tags: blog, one-column, custom-menu, translation-ready, japanese, vertical-writing
*/

/* =========================================================
   1. トークン
   ========================================================= */

:root {
	--font-serif: "Hiragino Mincho ProN", "HiraMinProN-W3", "Yu Mincho", "YuMincho", "BIZ UDMincho", "Noto Serif JP", "Source Han Serif JP", "Sawarabi Mincho", serif;
	--font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Yu Gothic", "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
	--font-body: var(--font-serif);

	--paper: #faf7f0;
	--paper-raised: #fffdf8;
	--ink: #22201c;
	--ink-soft: #5f594e;
	--ink-faint: #8d8578;
	--rule: #e3ddce;
	--rule-soft: #efeade;
	--accent: #9c3a2c;
	--accent-soft: #c0705f;
	--shadow: 0 1px 2px rgba(34, 32, 28, .05), 0 8px 24px rgba(34, 32, 28, .05);

	--wrap: 68rem;
	--measure: 40rem;
	--gutter: clamp(1.25rem, 5vw, 3rem);
}

:root[data-palette="white"] {
	--paper: #ffffff;
	--paper-raised: #ffffff;
	--ink: #17171a;
	--ink-soft: #55555c;
	--ink-faint: #8a8a91;
	--rule: #e2e2e6;
	--rule-soft: #f0f0f2;
	--accent: #8d3325;
	--accent-soft: #b56a5b;
	--shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .05);
}

:root[data-palette="night"] {
	--paper: #16171a;
	--paper-raised: #1d1f23;
	--ink: #d8d4cb;
	--ink-soft: #a09a90;
	--ink-faint: #726d65;
	--rule: #2f3238;
	--rule-soft: #24262b;
	--accent: #d98f7e;
	--accent-soft: #b3705f;
	--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
	color-scheme: dark;
}

/* =========================================================
   2. 土台
   ========================================================= */

*,
*::before,
*::after { box-sizing: border-box; }

html {
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
	scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: var(--font-body);
	font-size: 1rem;
	line-height: 1.9;
	font-feature-settings: "palt" 1;
	text-spacing-trim: trim-start;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-wrap: break-word;
	line-break: strict;
}

img, video, iframe, svg { max-width: 100%; }
img, video { height: auto; }

a {
	color: inherit;
	text-decoration-color: var(--rule);
	text-underline-offset: .25em;
	text-decoration-thickness: 1px;
	transition: color .15s ease, text-decoration-color .15s ease;
}

a:hover { color: var(--accent); text-decoration-color: currentColor; }

:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 3px;
	border-radius: 2px;
}

hr {
	border: 0;
	border-top: 1px solid var(--rule);
	margin: 2.5rem 0;
}

.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	margin: -1px; padding: 0;
	overflow: hidden;
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: absolute;
	left: 50%;
	top: 0;
	transform: translate(-50%, -120%);
	z-index: 200;
	background: var(--paper-raised);
	border: 1px solid var(--rule);
	padding: .6em 1.2em;
	font-family: var(--font-sans);
	font-size: .8125rem;
}

.skip-link:focus { transform: translate(-50%, .5rem); }

.wrap {
	width: min(100% - var(--gutter) * 2, var(--wrap));
	margin-inline: auto;
}

/* =========================================================
   3. ヘッダー
   ========================================================= */

.site-header {
	border-bottom: 1px solid var(--rule);
	background: var(--paper);
	background: color-mix(in srgb, var(--paper) 88%, transparent);
	-webkit-backdrop-filter: saturate(1.4) blur(8px);
	backdrop-filter: saturate(1.4) blur(8px);
	position: sticky;
	top: 0;
	z-index: 60;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.5rem;
	min-height: 4rem;
	padding-block: .75rem;
}

.site-branding { display: flex; align-items: baseline; gap: .75rem; min-width: 0; }

.site-title {
	margin: 0;
	font-size: 1.3125rem;
	font-weight: 600;
	letter-spacing: .06em;
	line-height: 1.4;
}

.site-title a { text-decoration: none; }

.site-description {
	margin: 0;
	font-family: var(--font-sans);
	font-size: .6875rem;
	letter-spacing: .08em;
	color: var(--ink-faint);
}

@media (max-width: 47.9375em) { .site-description { display: none; } }

.primary-nav ul {
	list-style: none;
	display: flex;
	align-items: center;
	gap: clamp(.9rem, 2.4vw, 1.9rem);
	margin: 0;
	padding: 0;
}

.primary-nav a {
	display: block;
	text-align: center;
	text-decoration: none;
	font-size: .9375rem;
	letter-spacing: .04em;
	line-height: 1.35;
	white-space: nowrap;
}

.primary-nav .menu-sub {
	display: block;
	font-family: var(--font-sans);
	font-size: .625rem;
	letter-spacing: .06em;
	color: var(--ink-faint);
	margin-top: .15em;
}

.primary-nav .current-menu-item > a,
.primary-nav .current_page_item > a,
.primary-nav .current-menu-ancestor > a { color: var(--accent); }

.nav-toggle {
	display: none;
	appearance: none;
	background: none;
	border: 1px solid var(--rule);
	border-radius: 3px;
	color: inherit;
	padding: .5rem .7rem;
	font-family: var(--font-sans);
	font-size: .75rem;
	letter-spacing: .1em;
	cursor: pointer;
}

@media (max-width: 47.9375em) {
	.nav-toggle { display: block; }

	.primary-nav {
		position: fixed;
		inset: 4.05rem 0 auto 0;
		background: var(--paper);
		border-bottom: 1px solid var(--rule);
		padding: 1rem var(--gutter) 1.75rem;
		display: none;
		max-height: calc(100dvh - 4.05rem);
		overflow-y: auto;
	}

	.primary-nav.is-open { display: block; }

	.primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }

	.primary-nav li + li { border-top: 1px solid var(--rule-soft); }

	.primary-nav a { text-align: start; padding: .9rem .25rem; font-size: 1rem; }

	.primary-nav .menu-sub { display: inline; margin-inline-start: .8em; }
}

/* =========================================================
   4. ページ見出し・一覧
   ========================================================= */

.site-main { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(3.5rem, 8vw, 6rem); }

.page-header { margin-bottom: clamp(2rem, 5vw, 3.25rem); }

.page-header__label {
	display: block;
	font-family: var(--font-sans);
	font-size: .6875rem;
	letter-spacing: .18em;
	text-transform: uppercase;
	color: var(--ink-faint);
	margin-bottom: .6rem;
}

.page-header__title {
	margin: 0;
	font-size: clamp(1.5rem, 4vw, 2rem);
	font-weight: 600;
	letter-spacing: .04em;
	line-height: 1.5;
}

.page-header__desc {
	margin: .9rem 0 0;
	color: var(--ink-soft);
	font-size: .9375rem;
	max-width: var(--measure);
}

.post-list {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--rule);
}

.post-card {
	border-bottom: 1px solid var(--rule);
}

.post-card__link {
	display: grid;
	grid-template-columns: 1fr;
	gap: .5rem;
	padding: clamp(1.5rem, 3.5vw, 2.1rem) .25rem;
	text-decoration: none;
}

.post-card__link:hover { color: inherit; }
.post-card__link:hover .post-card__title { color: var(--accent); }

.post-card__meta {
	display: flex;
	align-items: center;
	gap: .9rem;
	font-family: var(--font-sans);
	font-size: .6875rem;
	letter-spacing: .1em;
	color: var(--ink-faint);
}

.post-card__cat {
	border: 1px solid var(--rule);
	border-radius: 999px;
	padding: .15em .8em;
	white-space: nowrap;
}

.post-card__title {
	margin: 0;
	font-size: clamp(1.125rem, 2.6vw, 1.375rem);
	font-weight: 600;
	line-height: 1.65;
	letter-spacing: .02em;
	transition: color .15s ease;
}

.post-card__excerpt {
	margin: 0;
	color: var(--ink-soft);
	font-size: .9375rem;
	line-height: 1.95;
	max-width: var(--measure);
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.post-card__more {
	font-family: var(--font-sans);
	font-size: .75rem;
	letter-spacing: .08em;
	color: var(--accent);
}

.no-results { color: var(--ink-soft); }

/* ページ送り（アーカイブ） */

.pagination {
	margin-top: clamp(2.5rem, 6vw, 4rem);
	font-family: var(--font-sans);
	font-size: .875rem;
}

.pagination .nav-links {
	display: flex;
	flex-wrap: wrap;
	gap: .4rem;
	justify-content: center;
}

.pagination .page-numbers {
	display: grid;
	place-items: center;
	min-width: 2.5rem;
	height: 2.5rem;
	padding-inline: .7rem;
	border: 1px solid var(--rule);
	border-radius: 3px;
	text-decoration: none;
	letter-spacing: .06em;
}

.pagination .page-numbers.current {
	background: var(--ink);
	border-color: var(--ink);
	color: var(--paper);
}

.pagination .page-numbers.dots { border-color: transparent; }

/* =========================================================
   5. フッター
   ========================================================= */

.site-footer {
	border-top: 1px solid var(--rule);
	padding-block: clamp(2.5rem, 6vw, 3.5rem);
	font-family: var(--font-sans);
}

.site-footer__inner {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 1.5rem;
	text-align: center;
}

.social-nav ul {
	list-style: none;
	display: flex;
	gap: 1.25rem;
	margin: 0;
	padding: 0;
}

.social-nav a {
	display: grid;
	place-items: center;
	width: 2.25rem;
	height: 2.25rem;
	border-radius: 999px;
	color: var(--ink-soft);
}

.social-nav a:hover { color: var(--accent); background: var(--rule-soft); }
.social-nav svg { width: 1.125rem; height: 1.125rem; fill: currentColor; }

.footer-nav ul {
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 1.25rem;
	margin: 0;
	padding: 0;
	font-size: .8125rem;
	letter-spacing: .06em;
}

.footer-nav a { text-decoration: none; }

.site-footer__copy {
	margin: 0;
	font-size: .75rem;
	letter-spacing: .08em;
	color: var(--ink-faint);
}

/* =========================================================
   6. 検索フォーム
   ========================================================= */

.search-form {
	display: flex;
	gap: .5rem;
	max-width: 30rem;
}

.search-form label { flex: 1; }

.search-form .search-field,
.search-form .search-submit {
	font: inherit;
	font-family: var(--font-sans);
	font-size: .9375rem;
	border: 1px solid var(--rule);
	border-radius: 3px;
	padding: .7em .9em;
	background: var(--paper-raised);
	color: inherit;
	width: 100%;
}

.search-form .search-submit {
	width: auto;
	cursor: pointer;
	background: var(--ink);
	border-color: var(--ink);
	color: var(--paper);
	letter-spacing: .1em;
}

.search-form .search-submit:hover { background: var(--accent); border-color: var(--accent); }

/* =========================================================
   7. 404 / 汎用
   ========================================================= */

.notice-block {
	max-width: var(--measure);
	color: var(--ink-soft);
}

.notice-block p { line-height: 2; }

.button-link {
	display: inline-block;
	margin-top: 1.5rem;
	font-family: var(--font-sans);
	font-size: .8125rem;
	letter-spacing: .1em;
	border: 1px solid var(--rule);
	border-radius: 3px;
	padding: .8em 1.6em;
	text-decoration: none;
}

.button-link:hover { border-color: var(--accent); color: var(--accent); }