/*
Theme Name: 都市伝説ラボ Custom
Theme URI: https://toshidensetsu-labo.net
Author: MASUTO INC.
Description: 都市伝説ラボ専用ダークテーマ
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: Private
Text Domain: toshi-custom
*/

/* =========================================
   CSS Variables
   ========================================= */
:root {
  --bg-primary:   #08080f;
  --bg-secondary: #0e0e1a;
  --bg-card:      #111120;
  --bg-card-hover:#171728;
  --color-accent: #c0392b;
  --color-accent-hover: #e74c3c;
  --color-purple: #7b2d8b;
  --color-gold:   #c9a84c;
  --color-text:   #c0c0d0;
  --color-text-light: #8888a0;
  --color-heading: #f0f0ff;
  --color-border: #252538;
  --color-border-bright: #363658;
  --font-heading: 'Noto Serif JP', 'Hiragino Mincho ProN', serif;
  --font-body:    'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --container-width: 1180px;
  --sidebar-width: 300px;
  --radius: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.6);
  --shadow-hover: 0 8px 40px rgba(192,57,43,0.25);
  --transition: 0.3s ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--color-text);
  line-height: 1.8;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 背景の微細グリッド */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

#page { position: relative; z-index: 1; }

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.4;
}

ul, ol { padding-left: 1.5em; }

/* =========================================
   Layout
   ========================================= */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.site-content {
  padding: 40px 0 60px;
}

.content-area {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 40px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* =========================================
   Header
   ========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 8, 15, 0.95);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}

/* サイトロゴ・タイトル */
.site-branding { flex-shrink: 0; }

.site-branding .custom-logo { height: 44px; width: auto; }

.site-title-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.site-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

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

/* ヘッダー検索 */
.header-search { display: flex; align-items: center; }
.header-search-form { display: flex; gap: 0; }
.header-search-form input[type="search"] {
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-right: none;
  color: var(--color-text);
  padding: 6px 12px;
  border-radius: var(--radius) 0 0 var(--radius);
  font-size: 0.85rem;
  width: 180px;
  outline: none;
  transition: border-color var(--transition);
}
.header-search-form input[type="search"]:focus { border-color: var(--color-accent); }
.header-search-form button {
  background: var(--color-accent);
  border: none;
  color: #fff;
  padding: 6px 12px;
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition);
}
.header-search-form button:hover { background: var(--color-accent-hover); }

/* =========================================
   Navigation
   ========================================= */
.main-navigation { display: flex; align-items: center; }

.main-navigation ul {
  list-style: none;
  display: flex;
  gap: 0;
  padding: 0;
  margin: 0;
}

.main-navigation ul li { position: relative; }

.main-navigation ul li a {
  display: block;
  color: var(--color-text);
  font-size: 0.875rem;
  padding: 8px 14px;
  white-space: nowrap;
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.03em;
}

.main-navigation ul li a:hover,
.main-navigation ul li.current-menu-item > a,
.main-navigation ul li.current-menu-ancestor > a {
  color: var(--color-accent);
}

/* ドロップダウン */
.main-navigation ul ul {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-width: 200px;
  z-index: 200;
  flex-direction: column;
  gap: 0;
  padding: 6px 0;
  box-shadow: var(--shadow);
}
.main-navigation ul li:hover > ul { display: flex; }
.main-navigation ul ul li a { padding: 8px 16px; width: 100%; }

/* ハンバーガーメニュー */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-heading);
  transition: all var(--transition);
}
.menu-toggle.is-active .menu-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.is-active .menu-toggle-bar:nth-child(2) { opacity: 0; }
.menu-toggle.is-active .menu-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================
   Breadcrumb
   ========================================= */
.breadcrumb {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 0;
  font-size: 0.8rem;
  color: var(--color-text-light);
}
.breadcrumb a { color: var(--color-text-light); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb span { margin: 0 6px; }

/* =========================================
   Post Cards (Archive / Index)
   ========================================= */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.post-card__thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.post-card:hover .post-card__thumb img { transform: scale(1.05); }

.post-card__thumb-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--color-border-bright);
}

.post-card__category {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 3px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
}
.post-card__category:hover { background: var(--color-accent-hover); color: #fff; }

.post-card__body {
  padding: 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.post-card__title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}
.post-card__title a { color: var(--color-heading); }
.post-card__title a:hover { color: var(--color-accent); }

.post-card__excerpt {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border);
  padding-top: 10px;
  margin-top: auto;
}
.post-card__meta time { display: flex; align-items: center; gap: 4px; }

/* =========================================
   Page Header (アーカイブ・カテゴリータイトル)
   ========================================= */
.page-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0 30px;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
}
.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 3px;
  background: var(--color-accent);
}
.page-header .container { position: relative; z-index: 1; }

.page-title {
  font-size: 1.75rem;
  color: var(--color-heading);
  margin-bottom: 8px;
}
.page-title .cat-label {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 3px;
  margin-right: 10px;
  vertical-align: middle;
  font-weight: 700;
}
.page-description {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* =========================================
   Single Post
   ========================================= */
.single-post-header {
  margin-bottom: 32px;
}

.single-post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  font-size: 0.82rem;
  color: var(--color-text-light);
}
.single-post-meta .category-badge {
  background: var(--color-accent);
  color: #fff;
  padding: 3px 10px;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
}
.single-post-meta .category-badge:hover { background: var(--color-accent-hover); color: #fff; }

.single-post-title {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.45;
  margin-bottom: 20px;
}

.single-post-eye {
  border-left: 4px solid var(--color-accent);
  padding-left: 16px;
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  font-style: italic;
}

.single-featured-image {
  margin-bottom: 32px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 16/9;
}
.single-featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* =========================================
   Article Content
   ========================================= */
.entry-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-text);
}

.entry-content h2 {
  font-size: 1.4rem;
  margin: 2em 0 0.8em;
  padding: 12px 16px;
  border-left: 4px solid var(--color-accent);
  background: var(--bg-secondary);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.entry-content h3 {
  font-size: 1.2rem;
  margin: 1.8em 0 0.7em;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-heading);
}

.entry-content h4 {
  font-size: 1.05rem;
  margin: 1.5em 0 0.6em;
  color: var(--color-gold);
}

.entry-content p { margin-bottom: 1.4em; }

.entry-content a { color: var(--color-accent); border-bottom: 1px solid rgba(192,57,43,0.4); }
.entry-content a:hover { color: var(--color-accent-hover); border-bottom-color: var(--color-accent-hover); }

.entry-content ul, .entry-content ol { margin-bottom: 1.4em; padding-left: 1.8em; }
.entry-content li { margin-bottom: 0.4em; }

.entry-content blockquote {
  background: var(--bg-secondary);
  border-left: 4px solid var(--color-purple);
  margin: 1.8em 0;
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-light);
  font-style: italic;
}

.entry-content img {
  border-radius: var(--radius);
  margin: 1.2em auto;
  border: 1px solid var(--color-border);
}

.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}
.entry-content th {
  background: var(--bg-secondary);
  color: var(--color-heading);
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}
.entry-content td {
  border: 1px solid var(--color-border);
  padding: 9px 14px;
}
.entry-content tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

.entry-content code {
  background: var(--bg-secondary);
  color: var(--color-gold);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.88em;
  font-family: monospace;
}

.entry-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  margin: 1.5em 0;
}
.entry-content pre code { background: none; padding: 0; color: var(--color-text); }

/* =========================================
   Post Footer (タグ・シェアボタン)
   ========================================= */
.post-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  align-items: center;
}
.post-tags .tag-label {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-right: 4px;
}
.post-tags a {
  display: inline-block;
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 3px;
  transition: all var(--transition);
}
.post-tags a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* =========================================
   Related Posts
   ========================================= */
.related-posts {
  margin-top: 48px;
}
.related-posts__title {
  font-size: 1.1rem;
  color: var(--color-heading);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.related-posts__title::before {
  content: '◆';
  color: var(--color-accent);
  font-size: 0.75rem;
}

.related-posts__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-post-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.related-post-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}
.related-post-card__thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.related-post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.related-post-card:hover .related-post-card__thumb img { transform: scale(1.05); }
.related-post-card__body { padding: 12px; }
.related-post-card__title {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-heading);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-post-card:hover .related-post-card__title { color: var(--color-accent); }

/* =========================================
   Sidebar
   ========================================= */
.sidebar { display: flex; flex-direction: column; gap: 32px; }

.widget {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.widget-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-heading);
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.widget-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 2px;
}

.widget-content { padding: 16px; }

/* 最近の投稿 */
.widget-recent-posts { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0; }
.widget-recent-posts li {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.widget-recent-posts li:last-child { border-bottom: none; padding-bottom: 0; }
.widget-recent-posts .post-thumb {
  flex-shrink: 0;
  width: 64px;
  height: 44px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-secondary);
}
.widget-recent-posts .post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.widget-recent-posts .post-info { flex: 1; min-width: 0; }
.widget-recent-posts .post-title {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--color-heading);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition);
}
.widget-recent-posts li:hover .post-title { color: var(--color-accent); }
.widget-recent-posts .post-date { font-size: 0.72rem; color: var(--color-text-light); margin-top: 3px; }
.widget-recent-posts a { text-decoration: none; }

/* カテゴリー */
.widget-categories { list-style: none; padding: 0; margin: 0; }
.widget-categories li {
  border-bottom: 1px solid var(--color-border);
}
.widget-categories li:last-child { border-bottom: none; }
.widget-categories a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 4px;
  font-size: 0.85rem;
  color: var(--color-text);
  transition: color var(--transition);
}
.widget-categories a:hover { color: var(--color-accent); }
.widget-categories .count {
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 10px;
}

/* 検索ウィジェット */
.widget-search-form { display: flex; gap: 0; }
.widget-search-form input[type="search"] {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-right: none;
  color: var(--color-text);
  padding: 8px 12px;
  font-size: 0.85rem;
  border-radius: var(--radius) 0 0 var(--radius);
  outline: none;
  width: 100%;
}
.widget-search-form input[type="search"]:focus { border-color: var(--color-accent); }
.widget-search-form button {
  background: var(--color-accent);
  border: none;
  color: #fff;
  padding: 8px 14px;
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition);
  white-space: nowrap;
}
.widget-search-form button:hover { background: var(--color-accent-hover); }

/* =========================================
   Pagination
   ========================================= */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.88rem;
  transition: all var(--transition);
}
.pagination .page-numbers:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pagination .page-numbers.current {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* =========================================
   404 Page
   ========================================= */
.error-404 {
  text-align: center;
  padding: 80px 20px;
  max-width: 600px;
  margin: 0 auto;
}
.error-404 .error-code {
  font-size: 8rem;
  font-family: var(--font-heading);
  color: var(--color-accent);
  line-height: 1;
  opacity: 0.8;
  text-shadow: 0 0 40px rgba(192,57,43,0.4);
}
.error-404 h1 {
  font-size: 1.5rem;
  margin: 16px 0 12px;
  color: var(--color-heading);
}
.error-404 p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
}
.error-404 .btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: background var(--transition);
}
.error-404 .btn:hover { background: var(--color-accent-hover); color: #fff; }

/* =========================================
   Comments
   ========================================= */
.comments-area {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.comments-title {
  font-size: 1.1rem;
  margin-bottom: 24px;
  color: var(--color-heading);
  display: flex;
  align-items: center;
  gap: 8px;
}
.comments-title::before { content: '◆'; color: var(--color-accent); font-size: 0.75rem; }

.comment-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.comment-body {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
}
.comment-author { font-weight: 700; color: var(--color-heading); font-size: 0.9rem; }
.comment-meta { font-size: 0.78rem; color: var(--color-text-light); margin-bottom: 10px; }
.comment-content p { font-size: 0.9rem; }

.comment-respond {
  margin-top: 32px;
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.comment-reply-title {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--color-heading);
}
.comment-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 6px;
}
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form textarea {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  padding: 10px 14px;
  font-size: 0.9rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color var(--transition);
  margin-bottom: 16px;
}
.comment-form input:focus,
.comment-form textarea:focus { border-color: var(--color-accent); }
.comment-form textarea { min-height: 140px; resize: vertical; }
.comment-form .submit {
  background: var(--color-accent);
  border: none;
  color: #fff;
  padding: 10px 28px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-family: var(--font-body);
  transition: background var(--transition);
}
.comment-form .submit:hover { background: var(--color-accent-hover); }

/* =========================================
   Search Results
   ========================================= */
.search-header { margin-bottom: 28px; }
.search-header h1 { font-size: 1.4rem; }
.search-header h1 em { color: var(--color-accent); font-style: normal; }
.search-form-area {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 32px;
}
.search-form-area form { display: flex; gap: 0; }
.search-form-area input[type="search"] {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--color-border);
  border-right: none;
  color: var(--color-text);
  padding: 10px 16px;
  font-size: 0.95rem;
  border-radius: var(--radius) 0 0 var(--radius);
  outline: none;
}
.search-form-area input[type="search"]:focus { border-color: var(--color-accent); }
.search-form-area button {
  background: var(--color-accent);
  border: none;
  color: #fff;
  padding: 10px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition);
}
.search-form-area button:hover { background: var(--color-accent-hover); }

/* =========================================
   Footer
   ========================================= */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--color-border);
  margin-top: 60px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0 36px;
}

.footer-brand .footer-logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-heading);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.footer-brand .footer-logo span { color: var(--color-accent); }

.footer-brand p {
  font-size: 0.84rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.footer-social { display: flex; gap: 10px; }
.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-light);
  font-size: 0.9rem;
  transition: all var(--transition);
  text-decoration: none;
}
.footer-social a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.footer-section-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.footer-nav { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-nav a {
  font-size: 0.84rem;
  color: var(--color-text-light);
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-nav a::before { content: '›'; color: var(--color-accent); }
.footer-nav a:hover { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 0;
  text-align: center;
  font-size: 0.78rem;
  color: var(--color-text-light);
}
.footer-bottom a { color: var(--color-text-light); }
.footer-bottom a:hover { color: var(--color-accent); }

/* =========================================
   Utilities
   ========================================= */
.screen-reader-text {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.no-posts {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-light);
}
.no-posts p { font-size: 1rem; }

.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 32px 0;
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 1024px) {
  .content-area {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root { --container-width: 100%; }

  .menu-toggle { display: flex; }

  .main-navigation {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(8,8,15,0.98);
    overflow-y: auto;
    padding: 20px;
    z-index: 99;
  }
  .main-navigation.is-open { display: block; }
  .main-navigation ul {
    flex-direction: column;
    gap: 0;
  }
  .main-navigation ul li a {
    padding: 14px 8px;
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
  }
  .main-navigation ul ul {
    display: block;
    position: static;
    background: none;
    border: none;
    box-shadow: none;
    padding-left: 16px;
  }

  .header-search { display: none; }

  .posts-grid { grid-template-columns: 1fr; }
  .related-posts__grid { grid-template-columns: 1fr 1fr; }
  .single-post-title { font-size: 1.4rem; }
  .sidebar { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .error-404 .error-code { font-size: 5rem; }
}

@media (max-width: 480px) {
  .related-posts__grid { grid-template-columns: 1fr; }
  .posts-grid { gap: 16px; }
}

/* =========================================
   HOME ヒーローセクション
   ========================================= */
.hero-section {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #08080f 0%, #0e0e1a 50%, #110a0a 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-bg-effect {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(192,57,43,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(123,45,139,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
  padding-top: 60px;
  padding-bottom: 60px;
  position: relative;
  z-index: 1;
}

.hero-catch {
  font-size: 0.82rem;
  color: var(--color-text-light);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.hero-title .accent { color: var(--color-accent); }

.hero-desc {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 28px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-hero-primary {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn-hero-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
}

.btn-hero-ghost {
  display: inline-block;
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-bright);
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-hero-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* ヒービジュアル（装飾） */
.hero-visual {
  position: relative;
  width: 180px;
  height: 180px;
  flex-shrink: 0;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
}
.hero-orb--1 {
  width: 150px;
  height: 150px;
  top: 0;
  left: 0;
  background: radial-gradient(circle, rgba(192,57,43,0.25) 0%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}
.hero-orb--2 {
  width: 100px;
  height: 100px;
  bottom: 0;
  right: 0;
  background: radial-gradient(circle, rgba(123,45,139,0.2) 0%, transparent 70%);
  animation: pulse 5s ease-in-out infinite 1s;
}
.hero-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  filter: drop-shadow(0 0 20px rgba(192,57,43,0.5));
  animation: float 6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.7; }
}
@keyframes float {
  0%, 100% { transform: translate(-50%, -50%) translateY(0); }
  50% { transform: translate(-50%, -50%) translateY(-10px); }
}

/* =========================================
   注目記事（Featured）セクション
   ========================================= */
.featured-section {
  padding: 48px 0 0;
  background: var(--bg-primary);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.featured-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.featured-card__link { text-decoration: none; display: block; }
.featured-card__thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
}
.featured-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.featured-card:hover .featured-card__thumb img { transform: scale(1.05); }
.featured-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card-hover));
}
.featured-card__cat {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 3px;
}
.featured-card__body {
  padding: 16px;
}
.featured-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.featured-card:hover .featured-card__title { color: var(--color-accent); }
.featured-card__excerpt {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.featured-card__date {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

/* =========================================
   セクションタイトル（TOP共通）
   ========================================= */
.section-title {
  font-size: 1.15rem;
  color: var(--color-heading);
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 24px;
}
.section-title span {
  font-size: 1rem;
}
.section-title--main {
  margin-top: 48px;
}

/* 最新記事エリア */
.latest-section {
  padding: 0 0 60px;
}

/* =========================================
   目次（TOC）
   ========================================= */
.toc-box {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 0;
  margin: 1.8em 0 2em;
  overflow: hidden;
}

.toc-box__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--bg-secondary);
  cursor: pointer;
  user-select: none;
}

.toc-box__title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-box__title::before {
  content: '📋';
  font-size: 0.9rem;
}

.toc-box__toggle {
  font-size: 0.72rem;
  color: var(--color-text-light);
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 3px 8px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.toc-box__toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.toc-box__list {
  padding: 16px 20px;
  counter-reset: toc-h2;
}

.toc-box__list ol,
.toc-box__list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-h2 {
  counter-increment: toc-h2;
  counter-reset: toc-h3;
  margin-bottom: 8px;
}
.toc-h2 > a {
  display: flex;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text);
  text-decoration: none;
  line-height: 1.5;
  transition: color var(--transition);
  border-bottom: none !important;
}
.toc-h2 > a::before {
  content: counter(toc-h2) '.';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  min-width: 1.4em;
}
.toc-h2 > a:hover { color: var(--color-accent); }

.toc-h3-list {
  margin-top: 6px;
  margin-left: 1.6em;
  counter-reset: toc-h3;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.toc-h3 {
  counter-increment: toc-h3;
}
.toc-h3 > a {
  display: flex;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--color-text-light);
  text-decoration: none;
  line-height: 1.5;
  transition: color var(--transition);
  border-bottom: none !important;
}
.toc-h3 > a::before {
  content: counter(toc-h2) '-' counter(toc-h3) '.';
  color: var(--color-purple);
  font-size: 0.78rem;
  flex-shrink: 0;
  min-width: 2em;
}
.toc-h3 > a:hover { color: var(--color-accent); }

/* =========================================
   SNSシェアボタン
   ========================================= */
.share-buttons {
  margin: 32px 0 24px;
}

.share-buttons__title {
  font-size: 0.82rem;
  color: var(--color-text-light);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  text-align: center;
}

.share-buttons__list {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: none;
}

.share-btn--twitter {
  background: #000;
  color: #fff;
}
.share-btn--twitter:hover { background: #1a1a1a; color: #fff; transform: translateY(-2px); }

.share-btn--line {
  background: #06c755;
  color: #fff;
}
.share-btn--line:hover { background: #05a846; color: #fff; transform: translateY(-2px); }

.share-btn--copy {
  background: var(--bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.share-btn--copy:hover { border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-2px); }
.share-btn--copy.copied {
  border-color: #27ae60;
  color: #27ae60;
}

.share-btn__icon { font-size: 1rem; }

/* =========================================
   レスポンシブ追加
   ========================================= */
@media (max-width: 1024px) {
  .featured-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }
  .featured-grid { grid-template-columns: 1fr; }
  .share-buttons__list { justify-content: center; }
  .toc-box__list { padding: 12px 16px; }
}

/* =========================================
   アフィリエイトバナー（記事末尾）
   ========================================= */
.affiliate-banner {
  margin: 40px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.affiliate-banner--kindle {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-color: #f39c12;
}

.affiliate-banner--unext {
  background: linear-gradient(135deg, #1a0a1e 0%, #2d1b3e 100%);
  border-color: #9b59b6;
}

.aff-banner-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
}

.aff-banner-icon {
  font-size: 3rem;
  flex-shrink: 0;
  line-height: 1;
}

.aff-banner-body {
  flex: 1;
}

.aff-banner-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 6px;
  line-height: 1.4;
}

.aff-banner-desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
  margin: 0 0 14px;
  line-height: 1.6;
}

.aff-banner-btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.aff-banner-btn--kindle {
  background: #f39c12;
  color: #1a1a2e;
}
.aff-banner-btn--kindle:hover {
  background: #f1c40f;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(243,156,18,0.4);
}

.aff-banner-btn--unext {
  background: #9b59b6;
  color: #fff;
}
.aff-banner-btn--unext:hover {
  background: #8e44ad;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(155,89,182,0.4);
}

.aff-banner-note {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.45);
  margin: 8px 0 0;
}

/* 記事末尾バナー スマホ対応 */
@media (max-width: 600px) {
  .aff-banner-inner {
    flex-direction: column;
    text-align: center;
    padding: 20px 16px;
    gap: 12px;
  }
  .aff-banner-icon { font-size: 2.2rem; }
  .aff-banner-btn { display: block; text-align: center; }
}

/* =========================================
   アフィリエイトウィジェット（サイドバー）
   ========================================= */
.affiliate-widget {
  border-radius: var(--radius);
  overflow: hidden;
}

.affiliate-widget--kindle {
  background: linear-gradient(160deg, #1a1a2e 0%, #16213e 100%);
  border: 1px solid #f39c12 !important;
}

.affiliate-widget--unext {
  background: linear-gradient(160deg, #1a0a1e 0%, #2d1b3e 100%);
  border: 1px solid #9b59b6 !important;
}

.affiliate-widget .widget-title {
  background: rgba(255,255,255,0.06);
  color: #fff;
  font-size: 0.88rem;
  padding: 10px 16px;
  margin: 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.aff-sidebar-content {
  padding: 14px 16px;
}

.aff-sidebar-desc {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.8);
  margin: 0 0 10px;
  line-height: 1.6;
}

.aff-sidebar-desc strong {
  color: #fff;
}

.aff-sidebar-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.aff-sidebar-list li {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.75);
  padding: 3px 0;
  line-height: 1.5;
}

.aff-sidebar-btn {
  display: block;
  text-align: center;
  padding: 9px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
}

.aff-sidebar-btn--kindle {
  background: #f39c12;
  color: #1a1a2e;
}
.aff-sidebar-btn--kindle:hover {
  background: #f1c40f;
  box-shadow: 0 3px 10px rgba(243,156,18,0.4);
}

.aff-sidebar-btn--unext {
  background: #9b59b6;
  color: #fff;
}
.aff-sidebar-btn--unext:hover {
  background: #8e44ad;
  box-shadow: 0 3px 10px rgba(155,89,182,0.4);
}

.aff-note {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  text-align: center;
  margin: 8px 0 0;
}

/* =========================================
   広告バナー レスポンシブ対応
   ========================================= */

/* 固定サイズ画像を親幅に収める */
.vc-widget img,
.admax-widget img,
.rakuten-widget img,
.rakuten-banner-post img,
.affiliate-banner img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* 楽天ウィジェット（468x160）をスマホで縮小 */
.rakuten-banner-post,
.rakuten-widget .widget-content {
  overflow: hidden;
  width: 100%;
}
.rakuten-banner-post > div,
.rakuten-widget .widget-content > div {
  max-width: 100%;
  overflow: hidden;
}

/* サイドバー広告ウィジェット全般 */
.vc-widget .widget-content,
.admax-widget .widget-content {
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 1024px以下: サイドバーが2カラムになる際の広告幅制御 */
@media (max-width: 1024px) {
  .vc-widget img,
  .affiliate-banner--unext img {
    max-width: 100%;
    width: 100%;
    height: auto;
  }
  .rakuten-banner-post {
    overflow: hidden;
  }
  /* 楽天スクリプトが生成するiframeを縮小 */
  .rakuten-banner-post iframe,
  .rakuten-widget iframe {
    max-width: 100% !important;
    width: 100% !important;
  }
}

/* 768px以下（スマホ）: 広告を中央寄せ・はみ出し防止 */
@media (max-width: 768px) {
  .affiliate-banner {
    margin: 24px 0;
  }
  .affiliate-banner--unext,
  .affiliate-banner--admax {
    text-align: center;
    overflow: hidden;
  }
  .affiliate-banner--unext img {
    max-width: 100%;
    height: auto;
    width: auto;
  }
  .vc-widget,
  .admax-widget {
    overflow: hidden;
  }
  .vc-widget img {
    max-width: 100%;
    height: auto;
  }
  /* 楽天ウィジェット横幅をコンテナに合わせてスケール */
  .rakuten-banner-post,
  .rakuten-widget .widget-content {
    overflow: hidden;
    transform-origin: left top;
  }
  .rakuten-banner-post iframe,
  .rakuten-widget iframe {
    max-width: 100% !important;
    width: 100% !important;
    transform: scale(0.75);
    transform-origin: center top;
    margin-bottom: -40px;
  }
}