/*
Theme Name: kuropon.mobi 2026
Theme URI: https://kuropon.mobi/
Author: Satoru MUKAI
Author URI: https://kuropon.mobi/
Description: kuropon.mobi 2026年テーマ
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: kuropon-theme
Tags: blog, minimal, responsive, custom-logo, custom-menu, featured-images, translation-ready
*/

/* ============================================================
   CSS Variables
   ============================================================ */
:root {
  /* Nothing Phone inspired palette */
  --color-teal:        #5ecfca;   /* primary teal/mint */
  --color-teal-light:  #a8e8e5;   /* light teal surface */
  --color-teal-dark:   #2a9e99;   /* dark teal for hover */
  --color-pink:        #e8448a;   /* magenta/pink accent */
  --color-yellow:      #d4e600;   /* electric yellow accent */
  --color-bg:          #f4fbfb;   /* very light teal-tinted white */
  --color-surface:     #e6f7f7;   /* light teal surface */
  --color-border:      #b8e5e3;   /* teal-tinted border */
  --color-text-primary:   #0d3535; /* deep teal-black */
  --color-text-secondary: #3a6e6c; /* muted teal-text */
  --color-text-muted:     #7ab5b3; /* soft teal-gray */
  --color-accent:         #5ecfca;
  --color-accent-hover:   #2a9e99;
  --color-link:           #0d3535;
  --color-tag-bg:         #d0f0ee;
  --color-tag-text:       #2a6e6b;

  --font-sans:  'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic UI', 'Yu Gothic', Meiryo, sans-serif;
  --font-serif: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic UI', 'Yu Gothic', Meiryo, sans-serif; /* ゴシック統一 */

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 40px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;

  --max-width: 1080px;
  --content-width: 860px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);

  --transition: 0.2s ease;
}

/* ============================================================
   Dark Mode
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:             #0e1f1f;
    --color-surface:        #162a2a;
    --color-border:         #1e3d3d;
    --color-text-primary:   #d6f0ee;
    --color-text-secondary: #8abfbc;
    --color-text-muted:     #4d8a87;
    --color-link:           #d6f0ee;
    --color-tag-bg:         #1a3535;
    --color-tag-text:       #7ab5b3;
    --shadow-sm: 0 1px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  }

  .site-header-wrap {
    background: rgba(14, 31, 31, 0.97);
  }

  .post-card,
  .single-post {
    background: #162a2a;
  }

  .post-content pre {
    background: #0a1a1a;
  }

  .toc,
  .author-box {
    background: #162a2a;
  }

  .global-nav {
    background-color: #0e1f1f;
  }

  /* ダークモード用検索フォーム */
  .search-form input[type="search"] {
    background: #162a2a;
    color: var(--color-text-primary);
    border-color: var(--color-border);
  }

  /* ダークモード用ドロップダウン */
  .global-nav .nav-menu .sub-menu {
    background: #162a2a;
  }

  /* ダークモード用タグ */
  .footer-tag-cloud a {
    background: #1a3535;
    border-color: #1e3d3d;
  }

  /* カードサムネイルのプレースホルダー */
  .post-card-thumb {
    background: #1a3535;
  }

  /* ダークモード用画像フィルター（白飛び防止） */
  img:not([src*=".svg"]) {
    filter: brightness(0.92) contrast(1.02);
  }
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden; /* 横スクロール防止 */
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: 62px;
  /* header-wrap(fixed) + main + footer を縦並びにする */
  display: flex;
  flex-direction: column;
  align-items: stretch;   /* 子要素を必ず横幅100%に */
  min-height: 100vh;
  overflow-x: hidden; /* 横スクロール防止 */
}
body.has-global-nav {
  padding-top: 102px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul, ol {
  list-style: none;
}

/* ============================================================
   Layout
   ============================================================ */

/* body をページ全体のフレックスコンテナにする */
/* header-wrap(fixed)・main・footer が body の直接の子 */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

/* site-wrapper は今後使わない。念のため無害化 */
.site-wrapper {
  display: contents;
}

.site-main {
  flex: 1;
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-3xl);
}

/* ============================================================
   Header Wrap  ← fixed で常に画面幅100%
   ============================================================ */
.site-header-wrap {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;          /* left:0 + right:0 で確実に画面幅100% */
  width: 100%;
  z-index: 100;
  background: rgba(244, 251, 251, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--color-teal);
  box-sizing: border-box;
}

.site-header {
  width: 100%;
}

/* fixed分を body で吸収（base bodyルールで定義済み） */

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-branding {
  display: flex;
  align-items: center;
}

.site-logo img {
  height: 36px;
  width: auto;
}

.site-logo:hover {
  opacity: 0.8;
}

/* ============================================================
   Global Navigation
   ============================================================ */
.global-nav {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.global-nav-inner {
  display: flex;
  align-items: center;
}

.global-nav .nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
}

.global-nav .nav-menu li {
  position: relative;
}

.global-nav .nav-menu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
  white-space: nowrap;
}

.global-nav .nav-menu a:hover,
.global-nav .nav-menu .current-menu-item > a,
.global-nav .nav-menu .current-menu-ancestor > a {
  color: var(--color-teal-dark);
}

/* Dropdown */
.global-nav .nav-menu .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition);
  z-index: 200;
}

.global-nav .nav-menu li:hover > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.global-nav .nav-menu .sub-menu a {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.8125rem;
  border-bottom: 1px solid var(--color-border);
}

.global-nav .nav-menu .sub-menu li:last-child a {
  border-bottom: none;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition);
}

/* ============================================================
   Article Cards (Archive / Home)
   ============================================================ */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl) var(--spacing-lg);
}

.post-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(94, 207, 202, 0.25);
}

.post-card-thumb {
  position: relative;
  width: 100%;
  padding-top: 66.666%; /* 3:2 */
  overflow: hidden;
  background: var(--color-surface);
  border-radius: 0;
  margin: var(--spacing-md) var(--spacing-md) 0;
  width: calc(100% - var(--spacing-md) * 2);
  border-radius: var(--radius-md);
}

.post-card-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.post-card:hover .post-card-thumb img {
  transform: scale(1.04);
}

.post-card-no-thumb {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 2rem;
}

.post-card-body {
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.post-card-category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.post-card-category a:hover {
  color: var(--color-text-primary);
}

.post-card-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-title a {
  color: inherit;
}

.post-card-title a:hover {
  color: var(--color-teal-dark);
}

.post-card-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-meta {
  margin-top: auto;
  padding-top: var(--spacing-sm);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
  margin-top: var(--spacing-3xl);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xs);
}

.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.pagination .page-numbers:hover {
  border-color: var(--color-teal-dark);
  color: var(--color-teal-dark);
}

.pagination .page-numbers.current {
  background: var(--color-teal);
  color: #fff;
  border-color: var(--color-teal);
}

.pagination .page-numbers.dots {
  border-color: transparent;
  pointer-events: none;
}

.pagination .prev,
.pagination .next {
  width: auto;
  padding: 0 var(--spacing-md);
  gap: var(--spacing-xs);
}

/* ============================================================
   Single Post
   ============================================================ */
.single-post {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xl) var(--spacing-2xl) var(--spacing-2xl);
}

/* ブレッドクラムも .container 内で自然に流れる */

.post-header {
  margin-bottom: var(--spacing-xl);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.post-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
}

.post-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.post-eyecatch {
  margin: var(--spacing-xl) auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: var(--content-width);
}

.post-eyecatch-inner {
  position: relative;
  width: 100%;
  padding-top: 66.666%; /* 3:2 */
}

.post-eyecatch-inner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   Post Content
   ============================================================ */
.post-content {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--color-text-primary);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.4;
  margin: 2em 0 0.75em;
  color: var(--color-text-primary);
}

.post-content h2 { font-size: 1.5rem; border-bottom: 2px solid var(--color-teal-light); padding-bottom: var(--spacing-sm); }
.post-content h3 { font-size: 1.25rem; }
.post-content h4 { font-size: 1.125rem; }

.post-content p { margin-bottom: 1.5em; }

.post-content a {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-content a:hover { opacity: 0.7; }

.post-content ul,
.post-content ol {
  margin: 1em 0 1.5em 1.5em;
  list-style: revert;
}

.post-content li { margin-bottom: 0.4em; }

.post-content blockquote {
  margin: 1.5em 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 3px solid var(--color-teal);
  background: var(--color-surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.post-content pre {
  background: #1a1a1a;
  color: #e8e8e8;
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 1.5em 0;
}

.post-content code {
  background: var(--color-surface);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

.post-content img {
  border-radius: var(--radius-md);
  margin: 1.5em auto;
}

.post-content figure {
  margin: 1.5em 0;
}

.post-content figcaption {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}

.post-content th,
.post-content td {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

.post-content th {
  background: var(--color-surface);
  font-weight: 600;
}

/* ============================================================
   Post Tags
   ============================================================ */
.post-tags {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: center;
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.post-tags-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.tag-link {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 100px;
  font-size: 0.8125rem;
  transition: all var(--transition);
}

.tag-link:hover {
  background: var(--color-pink);
  color: #fff;
}

/* ============================================================
   Related Posts
   ============================================================ */
.related-posts {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.related-posts-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

/* ============================================================
   Page Header
   ============================================================ */
.page-header {
  padding: var(--spacing-xl) 0;
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.page-header-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.page-header-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.page-header-count {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

/* ============================================================
   Search
   ============================================================ */
.search-form {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.search-form input[type="search"] {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.875rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition);
  background: var(--color-surface);
  width: 200px;
}

.search-form input[type="search"]:focus {
  border-color: var(--color-teal);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(94, 207, 202, 0.2);
}

.search-form button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  transition: color var(--transition);
}

.search-form button:hover {
  color: var(--color-text-primary);
}

/* ============================================================
   Footer  ← 常に画面幅100%
   ============================================================ */
.site-footer {
  width: 100%;
  box-sizing: border-box;
  background: var(--color-surface);
  border-top: 2px solid var(--color-teal);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand .site-logo img {
  height: 30px;
  margin-bottom: var(--spacing-md);
}

.footer-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.footer-widget-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.footer-categories {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-categories a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.footer-categories a:hover {
  color: var(--color-text-primary);
}

/* Tag Cloud */
.footer-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  align-items: baseline; /* フォントサイズが違っても揃える */
}

.footer-tag-cloud a,
.footer-tag-item {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
  transition: all var(--transition);
  line-height: 1.6;
  text-decoration: none;
}

.footer-tag-cloud a:hover,
.footer-tag-item:hover {
  background: var(--color-pink);
  border-color: var(--color-pink);
  color: #fff;
}

.footer-tag-cloud a:hover {
  background: var(--color-pink);
  border-color: var(--color-pink);
  color: #fff;
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

/* ============================================================
   404 / No Results
   ============================================================ */
.no-results,
.error-404 {
  text-align: center;
  padding: var(--spacing-3xl) 0;
  max-width: 480px;
  margin: 0 auto;
}

.no-results-title,
.error-404-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.no-results-text,
.error-404-text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* ============================================================
   Accessibility
   ============================================================ */
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-text-primary);
  color: #fff;
  font-size: 0.875rem;
  z-index: 9999;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  top: 0;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
  }

  .single-post {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
  }

  .posts-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .related-posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .global-nav-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .global-nav .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    padding-bottom: var(--spacing-md);
  }

  .global-nav .nav-menu.is-active {
    display: flex;
  }

  .global-nav .nav-menu a {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  .global-nav .nav-menu .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding-left: var(--spacing-md);
  }

  .search-form input[type="search"] {
    width: 140px;
  }
}

@media (max-width: 480px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }

  .post-title {
    font-size: 1.375rem;
  }

  .pagination .page-numbers {
    width: 36px;
    height: 36px;
    font-size: 0.8125rem;
  }
}

/* ============================================================
   Nothing Phone Accent Helpers
   ============================================================ */

/* Yellow accent: sticky post indicator */
.sticky {
  border-left: 3px solid var(--color-yellow);
  padding-left: var(--spacing-md);
}

/* Pink accent: category label on hover */
.post-card-category a:hover {
  color: var(--color-pink);
}

/* Teal glow on card thumb focus */
.post-card-thumb:focus-within {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
}

/* Active nav item underline in teal */
.global-nav .nav-menu .current-menu-item > a {
  border-bottom: 2px solid var(--color-teal);
}

/* Post page-header: teal left accent */
.page-header {
  padding: var(--spacing-xl) 0;
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
  border-left: 4px solid var(--color-teal);
  padding-left: var(--spacing-lg);
}

/* Footer category link hover: teal */
.footer-categories a:hover {
  color: var(--color-teal-dark);
}

/* Selection color */
::selection {
  background: rgba(94, 207, 202, 0.3);
  color: var(--color-text-primary);
}

.alignleft { float: left; margin-right: var(--spacing-lg); margin-bottom: var(--spacing-md); }
.alignright { float: right; margin-left: var(--spacing-lg); margin-bottom: var(--spacing-md); }
.aligncenter { display: block; margin: 0 auto var(--spacing-md); }
.alignwide { margin-left: -40px; margin-right: -40px; }
.alignfull { margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); }
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: 0.8125rem; color: var(--color-text-muted); text-align: center; margin-top: var(--spacing-xs); }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-sm); margin: 1.5em 0; }
.gallery-item img { border-radius: var(--radius-sm); }

/* ============================================================
   Article Multi-Column Layouts
   記事内で使える2・3カラムレイアウト
   使い方:
     2カラム → <div class="col-2"> ... </div>
     3カラム → <div class="col-3"> ... </div>
     各列   → <div class="col-item"> ... </div>
   オプション修飾子:
     .col--border   : 列間に縦線
     .col--card     : 各列をカード風に
     .col--center   : 列内コンテンツを中央揃え
     .col--gap-sm   : 列間を狭く
     .col--gap-lg   : 列間を広く
   ============================================================ */

/* ---- Base grid ---- */
.post-content .col-2,
.post-content .col-3 {
  display: grid;
  gap: var(--spacing-lg);
  margin: 2em 0;
  align-items: start;
}

.post-content .col-2 { grid-template-columns: repeat(2, 1fr); }
.post-content .col-3 { grid-template-columns: repeat(3, 1fr); }

/* ---- Column item ---- */
.post-content .col-item {
  min-width: 0; /* グリッドのはみ出し防止 */
}

/* ---- Gap modifiers ---- */
.post-content .col-2.col--gap-sm,
.post-content .col-3.col--gap-sm { gap: var(--spacing-sm); }

.post-content .col-2.col--gap-lg,
.post-content .col-3.col--gap-lg { gap: var(--spacing-xl); }

/* ---- Border between columns ---- */
.post-content .col-2.col--border,
.post-content .col-3.col--border {
  gap: 0;
}

.post-content .col--border .col-item {
  padding: 0 var(--spacing-lg);
  border-right: 1px solid var(--color-border);
}

.post-content .col--border .col-item:first-child { padding-left: 0; }
.post-content .col--border .col-item:last-child  { padding-right: 0; border-right: none; }

/* ---- Card style ---- */
.post-content .col--card .col-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.post-content .col--card .col-item:hover {
  box-shadow: 0 6px 20px rgba(94, 207, 202, 0.18);
  transform: translateY(-2px);
}

/* ---- Center align modifier ---- */
.post-content .col--center .col-item {
  text-align: center;
}

.post-content .col--center .col-item img {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Images inside columns ---- */
.post-content .col-item img {
  width: 100%;
  border-radius: var(--radius-sm);
  margin: 0 0 var(--spacing-sm);
}

/* ---- Headings inside columns ---- */
.post-content .col-item h3,
.post-content .col-item h4 {
  margin-top: 0.5em;
  font-size: 1rem;
  font-weight: 700;
}

.post-content .col-item p {
  font-size: 0.9375rem;
  margin-bottom: 0.75em;
  color: var(--color-text-secondary);
}

.post-content .col-item p:last-child { margin-bottom: 0; }

/* ---- Teal accent heading bar ---- */
.post-content .col--card .col-item h3,
.post-content .col--card .col-item h4 {
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-teal-light);
  margin-bottom: var(--spacing-sm);
}

/* ---- Comparison table style (2-col only) ---- */
.post-content .col-2.col--compare .col-item:first-child {
  border-right: 2px solid var(--color-teal);
}

.post-content .col-2.col--compare .col-item {
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border-radius: var(--radius-md);
}

.post-content .col-2.col--compare .col-item:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.post-content .col-2.col--compare .col-item:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ---- Responsive: collapse to 1 column on mobile ---- */
@media (max-width: 600px) {
  .post-content .col-2,
  .post-content .col-3 {
    grid-template-columns: 1fr;
  }

  .post-content .col--border .col-item {
    padding: var(--spacing-md) 0;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .post-content .col--border .col-item:last-child {
    border-bottom: none;
  }

  .post-content .col-2.col--compare .col-item,
  .post-content .col-2.col--compare .col-item:first-child,
  .post-content .col-2.col--compare .col-item:last-child {
    border-radius: var(--radius-md);
    border-right: none;
    border-bottom: 2px solid var(--color-teal);
  }

  .post-content .col-2.col--compare .col-item:last-child {
    border-bottom: none;
  }
}

/* ---- Tablet: 3-col → 2-col ---- */
@media (max-width: 768px) {
  .post-content .col-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .post-content .col-3 .col-item:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    max-width: 50%;
    margin: 0 auto;
  }
}

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb {
  margin-bottom: var(--spacing-lg);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  margin: 0 var(--spacing-sm);
  color: var(--color-border);
  font-size: 0.75rem;
}

.breadcrumb-item a {
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.breadcrumb-item a:hover {
  color: var(--color-teal-dark);
}

.breadcrumb-current {
  color: var(--color-text-secondary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 260px;
  display: inline-block;
  vertical-align: bottom;
}

/* ============================================================
   Back to List Buttons
   ============================================================ */
.post-back-nav {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.back-to-list {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px var(--spacing-lg);
  border: 1.5px solid var(--color-teal);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-teal-dark);
  background: var(--color-bg);
  transition: all var(--transition);
  white-space: nowrap;
}

.back-to-list:hover {
  background: var(--color-teal);
  color: #fff;
  border-color: var(--color-teal);
}

.back-to-list--home {
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

.back-to-list--home:hover {
  background: var(--color-text-primary);
  color: #fff;
  border-color: var(--color-text-primary);
}

@media (max-width: 480px) {
  .back-to-list {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================================
   PR Section (top page only)
   ============================================================ */
.pr-section {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 2px dashed var(--color-border);
}

.pr-section-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.pr-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  background: var(--color-text-muted);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.pr-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-secondary);
}

.pr-section-note {
  width: 100%;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: calc(-1 * var(--spacing-sm));
}

/* PR card variant */
.post-card--pr .post-card-thumb {
  position: relative;
}

.pr-card-badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  padding: 2px 8px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  line-height: 1.6;
}

.post-card--pr:hover .post-card-thumb img {
  transform: scale(1.04);
}

/* ============================================================
   Table of Contents（目次）
   ============================================================ */
.toc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-xl) auto;
  max-width: var(--content-width);
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.toc-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.toc-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 2px 10px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--transition);
}
.toc-toggle:hover { border-color: var(--color-teal); color: var(--color-teal-dark); }

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.toc-list.is-hidden { display: none; }

.toc-item a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 6px;
  transition: color var(--transition);
  line-height: 1.5;
}
.toc-item a::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-teal);
  flex-shrink: 0;
  margin-top: 2px;
}
.toc-item a:hover { color: var(--color-teal-dark); }
.toc-level-3 { padding-left: var(--spacing-lg); }
.toc-level-4 { padding-left: calc(var(--spacing-lg) * 2); }
.toc-level-3 a::before { width: 4px; height: 4px; background: var(--color-text-muted); }
.toc-level-4 a::before { width: 3px; height: 3px; background: var(--color-border); }

/* ============================================================
   Author Box
   ============================================================ */
.author-box {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) auto 0;
  max-width: var(--content-width);
}

.author-avatar img {
  border-radius: 50%;
  width: 80px;
  height: 80px;
  object-fit: cover;
  flex-shrink: 0;
}

.author-info {
  flex: 1;
  min-width: 0;
}

.author-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.author-name {
  display: inline-block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  text-decoration: none;
}
.author-name:hover { color: var(--color-teal-dark); }

.author-bio {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

@media (max-width: 480px) {
  .author-box { flex-direction: column; align-items: center; text-align: center; }
}

/* ============================================================
   In-article Ad
   ============================================================ */
.post-ad {
  margin: var(--spacing-xl) auto;
  max-width: var(--content-width);
  text-align: center;
}

/* PC広告：デフォルト表示、スマホでは非表示 */
.post-ad-pc    { display: block; }
.post-ad-mobile { display: none; }

@media (max-width: 768px) {
  .post-ad-pc    { display: none; }
  .post-ad-mobile { display: block; }
}

/* ============================================================
   Logo size fix（画像本来のサイズで表示）
   ============================================================ */
.site-logo img {
  height: auto;    /* 固定heightを解除 */
  max-height: 48px; /* ヘッダー内に収まる上限だけ設ける */
  width: auto;
}

/* ============================================================
   Diary Section（トップページ）
   ============================================================ */
.diary-section {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 2px dashed var(--color-border);
}

.diary-section-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.diary-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  background: var(--color-teal);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.diary-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  flex: 1;
}

.diary-section-more {
  font-size: 0.8125rem;
  color: var(--color-teal-dark);
  font-weight: 600;
  transition: color var(--transition);
}
.diary-section-more:hover {
  color: var(--color-pink);
}

@media (prefers-color-scheme: dark) {
  .diary-section { border-top-color: var(--color-border); }
  .diary-badge   { background: var(--color-teal-dark); }
}

/* ============================================================
   WordPress 管理バー対応
   ログイン中は body に margin-top:32px が付くため補正
   ============================================================ */
.admin-bar .site-header-wrap {
  top: 32px;
}

/* モバイルでは管理バーが 46px になる */
@media screen and (max-width: 782px) {
  .admin-bar .site-header-wrap {
    top: 46px;
  }
  .admin-bar body,
  .admin-bar .site-footer {
    /* モバイル管理バー分の補正 */
  }
}

/* ============================================================
   reCAPTCHA バッジ非表示
   ※ reCAPTCHA を使用する場合は利用規約に基づき
     「This site is protected by reCAPTCHA...」の
     テキストリンクをページ内に表示してください。
   ============================================================ */
.grecaptcha-badge {
  visibility: hidden !important;
  opacity: 0 !important;
}